14 Common Judo injuries (Prevention & Treatment)

The judo injuries that come up most on the mat: bruises, ankle and wrist sprains, collateral ligament damage and dislocated shoulders or fingers.

Throws and hard landings also cause concussions, ACL and meniscus injuries, back and neck pain, a dislocated elbow and forearm fractures, each with its causes and warning signs.

Injury Rates and Numbers

The figures below come from injury surveillance data and peer reviewed studies. Each row names the population it was measured in, because rates from elite athletes and from recreational players are not comparable.

Finding	Measured in	Source
Across 21 seasons of medically supervised judo competition in France, 3,511 injuries were recorded among 316,203 judoka, an injury proportion of 1.1 percent.	316,203 competing judoka of all ages, sexes, and performance levels at French competitions, 1993 to 2014; published 2019	Frey A et al., Orthopaedic Journal of Sports Medicine, Epidemiology of Judo-Related Injuries in 21 Seasons of Competitions in France
Sprains are by far the most common judo competition injury at 54.3 percent of all cases, ahead of fractures at 15.6 percent and dislocations at 12.5 percent.	Competing judoka at French judo competitions, all ages and levels, 1993 to 2014; published 2019	Frey A et al., Orthopaedic Journal of Sports Medicine, Epidemiology of Judo-Related Injuries in 21 Seasons of Competitions in France
Female judoka were injured at a higher rate than male judoka in French competition, 1.33 percent versus 1.04 percent, driven mainly by knee sprains.	78,571 female and 237,632 male competing judoka in France, 1993 to 2014; published 2019	Frey A et al., Orthopaedic Journal of Sports Medicine, Epidemiology of Judo-Related Injuries in 21 Seasons of Competitions in France
Young adult judoka aged 18 to 20 carry the highest competition injury rate at 1.56 percent, more than double the 0.68 percent seen in children aged 10 to 14.	50,022 competing judoka aged 18 to 20 and 84,321 aged 10 to 14 in France, 1993 to 2014; published 2019	Frey A et al., Orthopaedic Journal of Sports Medicine, Epidemiology of Judo-Related Injuries in 21 Seasons of Competitions in France
A systematic review of 25 judo tournament studies found time loss injuries in 1.1 to 4.1 percent of judoka, with the head the most frequently injured body part.	Judoka competing in tournaments, pooled across 25 included studies, Systematic review published 2023, literature from inception	Translational Sports Medicine, Epidemiology of Injuries during Judo Tournaments

Overview

Injury	Body area	Typical time out
Bruises and Contusions	Whole body	Days to 2 weeks, 3 to 6 if deep
Sprains (ankle, wrist)	Ankle and wrist	1 to 8 weeks, 3 months if complete
Collateral Ligament Injury	Knee	2 to 10 weeks, 3 months if complete
Strains (muscle)	Thigh, groin, and back	2 to 12 weeks, longer if complete
Fractures (hand, foot)	Hand and foot	4 to 8 weeks, 3 months if surgery
Dislocations (shoulder, fingers)	Shoulder and fingers	2 weeks to 6 months by joint
Concussions	Head	1 to 2 weeks min, months if persistent
Knee Injuries (e.g., ACL tear, Meniscus injury)	Knee	6 weeks to 12 months by injury
Cuts and Abrasions	Skin	0 days to 2 weeks if stitched
Rotator Cuff Injury	Shoulder	6 to 12 weeks, 4 to 6 months post op
Back Pain	Lower back	1 to 4 weeks, up to 3 months
Neck Pain	Neck	Days to 3 weeks, 6 to 12 with nerve pain
Dislocated Elbow	Elbow	6 to 12 weeks, 3 to 6 months if complex
Fractures of the Humerus or Forearm	Arm	6 weeks to 6 months, longer post op
Ankle Sprain	Ankle	1 to 6 weeks, 2 to 3 months if severe
Turf Toe (Sprain of the Big Toe Joint)	Toe	1 to 6 weeks, 2 to 3 months if severe
Shin Splints (Medial Tibial Stress Syndrome)	Shin	2 to 6 weeks, 2 to 3 months if fracture

Bruises and Contusions

A contusion is bleeding inside a muscle or under the skin after direct impact, when small vessels in the tissue tear but the skin stays closed. In judo the usual causes are landing on a hip, elbow or shoulder during ukemi, a knee or forearm pressing into the thigh in newaza, and the repeated grip fights that leave the forearms sore. Deeper thigh contusions involve the quadriceps muscle belly itself, which is why they stiffen more than a surface bruise.

Symptoms

• A tender spot that hurts when you press it or lie on it
• Skin that turns red, then blue or purple, then yellow over about two weeks
• Local swelling and a feeling of tightness in the muscle
• Stiffness that is worst in the morning or after sitting still
• Pain when you contract or stretch the muscle underneath

How serious it is: A superficial bruise involves only skin and fat and settles quickly. A deep muscle contusion, most often in the thigh, limits how far you can bend the joint and takes far longer; a rough guide is how much knee flexion you keep in the first day.

Typical time out: Most surface bruises stop limiting training within a few days to two weeks. A deep thigh contusion that leaves you with less than ninety degrees of knee bend often needs three to six weeks, and longer if you keep training through it and the muscle bleeds again.

See a doctor if: See a doctor if a bruised limb becomes tight, numb, or increasingly painful out of proportion to the injury, since that can signal bleeding under pressure rather than a simple bruise.

What helps

• Keep moving the limb gently within a pain free range from the first day instead of holding it still
• Short cooling for pain relief in the first hours is fine, but do not rely on it beyond that
• For a thigh contusion, hold the knee in a comfortably bent position early, then work the range back
• Return to falls and randori in stages once you can contract the muscle without sharp pain
• Get it looked at if the swelling grows over days rather than shrinking

Sprains (ankle, wrist)

A sprain is a stretch or tear of a ligament, the short fibrous band that holds two bones together. At the ankle it is usually the anterior talofibular ligament on the outer side, loaded when the foot rolls inward as you post out of a throw or catch a foot in the mat. At the wrist it is often the scapholunate or the ulnar side ligaments, loaded when you brace a hand against the mat or hold a stiff grip while your partner turns.

Symptoms

• Sharp pain at the moment of the twist, then a duller ache
• Swelling around the joint within an hour or two
• Tenderness over one specific spot rather than the whole joint
• Pain when you weight the ankle or push through the palm
• A sense that the joint is loose or not to be trusted

How serious it is: Grade 1 means the ligament is stretched with tenderness but a stable joint, grade 2 a partial tear with more swelling and some looseness, grade 3 a complete tear with obvious instability. Sprains are the most common judo competition injury by a wide margin, at 54.3 percent of all recorded cases in the French competition data.

Typical time out: A grade 1 sprain usually allows light mat work again within one to three weeks. Grade 2 takes about four to eight weeks to hold up under randori, and a grade 3 tear or a wrist ligament rupture can take three months or more, especially if surgery is needed. The spread is wide because ligaments regain stiffness slowly even after the pain goes.

See a doctor if: Get imaging if you cannot take four steps on the ankle, if bone feels tender at the tip of either ankle bone, or if a wrist stays swollen and painful in the snuffbox area beyond a few days.

What helps

• Load the joint early within a pain limit, since protected walking beats waiting for it to feel normal
• Balance and single leg work for the ankle, starting on the floor and progressing to unstable surfaces
• Tape or a lace up brace for the first months back, which reduces the chance of a repeat sprain
• Grip strength and forearm work for the wrist before you return to hard kumikata
• Physiotherapy if the joint still gives way or swells after four to six weeks

Collateral Ligament Injury

The medial and lateral collateral ligaments run along the inner and outer side of the knee and stop it from bending sideways. In judo the medial one takes most of the damage, when a planted foot stays fixed and the knee is forced inward during osoto gari, uchi mata or a defended throw. The inner ligament also blends with the joint capsule and the medial meniscus, which is why the two are often hurt together.

Symptoms

• Pain on the inner or outer side of the knee, not in the middle
• Swelling along the joint line rather than a ballooned knee
• A feeling that the knee opens up sideways when you cut or turn
• Pain when you push the knee inward or stand on one leg
• Difficulty straightening the knee fully in the first days

How serious it is: Grade 1 is a stretch with pain but no opening of the joint, grade 2 a partial tear with some sideways give and a firm end point, grade 3 a full tear where the joint opens with no end point. Isolated grade 1 and 2 medial injuries heal well without surgery; a grade 3 with cruciate or meniscus damage is a different problem.

Typical time out: Two to four weeks for a grade 1, roughly four to ten weeks for a grade 2, and three months or more for a grade 3 or a combined injury with the cruciate ligament. Knee sprains are also the main reason female judoka show a higher competition injury rate than men in the French data, 1.33 percent versus 1.04 percent.

See a doctor if: See a doctor the same day if the knee swelled within an hour, locks, or gives way under body weight, since that points beyond an isolated collateral injury.

What helps

• Full range of motion work early, since a stiff knee is harder to fix than a slightly lax one
• A hinged brace for the first weeks of a grade 2, which allows bending while blocking sideways force
• Quadriceps and hip abductor strengthening before any turning or throwing
• Controlled uchikomi before randori, avoiding the throw that caused it until the leg holds under load
• Imaging if there is a large effusion, locking, or no clear improvement in two to three weeks

Strains (muscle)

A strain is a tear in muscle fibers, usually where the muscle meets its tendon. In judo the hamstrings and adductors are the classic sites, torn when a leg is stretched under load in a sprawl or a defended leg grab, and the hip flexors and erector spinae when you lift and rotate a resisting partner. The tear happens most often during eccentric work, that is while the muscle is lengthening and braking at the same time.

Symptoms

• A sudden pull or catch during an explosive movement
• Pain in a defined spot that hurts when you stretch or contract the muscle
• Bruising that shows up a day or two later, often lower than the tear
• Weakness or an unwillingness to push hard on that side
• Cramping and tightness around the sore area

How serious it is: Grade 1 is a minor tear with pain but near normal strength, grade 2 a partial tear with clear weakness and a painful gap on pressing, grade 3 a complete tear or a tendon pulled off the bone, which can need surgery. Tears near the tendon or at the sitting bone heal slower than tears in the muscle belly.

Typical time out: Two to six weeks for a grade 1, six to twelve weeks for a grade 2, and three months or more for a proximal hamstring tear or after surgical repair. The spread is wide because the recurrence risk stays high for weeks after the pain settles.

See a doctor if: Get it checked if you felt a pop and cannot walk normally, if there is a visible dent or lump in the muscle, or if there is numbness down the leg.

What helps

• Start gentle isometric holds in the first days, then progress to eccentric loading such as Nordic curls or Copenhagen adductor work
• Build load week by week rather than testing the muscle with a maximal effort
• Do not return to randori while the muscle is still weaker than the other side under resistance
• Address the hip and trunk strength that let the muscle be overloaded in the first place
• Physiotherapy if the same muscle tears twice, since that usually means the rehab ended too early

Fractures (hand, foot)

A fracture is a break in the bone itself. In the hand it is typically a metacarpal or a finger phalanx, broken when a finger is caught and levered in the sleeve or lapel, or when a hand is trapped under a falling body. In the foot the metatarsals and toes take the impact from a foot planted and rolled during a throw or kicked into a shin or the mat edge.

Symptoms

• Immediate sharp pain that does not settle after a few minutes
• Swelling and bruising over the back of the hand or foot
• Pain when you press directly on the bone rather than on soft tissue
• A finger or toe that points the wrong way or rotates when you make a fist
• Difficulty gripping or pushing off the foot

How serious it is: Undisplaced fractures where the bone ends stay in line are usually treated with a splint or buddy taping. Displaced, rotated, or joint involving fractures need to be set and sometimes fixed with wires or a plate. Fractures made up 15.6 percent of injuries in the French competition study, second only to sprains.

Typical time out: Four to eight weeks for a simple undisplaced hand or foot fracture before full grip or push off returns, and three months or more when the fracture is displaced, involves a joint, or needs surgery. Scaphoid and fifth metatarsal fractures often take longer because their blood supply is poor.

See a doctor if: Go to a doctor if a finger or toe looks crooked or crosses its neighbor when you bend it, if the skin is broken over the break, or if the digit is pale, cold or numb.

What helps

• Get an x-ray early rather than taping a suspected break and hoping, since rotation left uncorrected stays permanent
• Splint or buddy tape only as long as prescribed, then start moving the neighboring joints
• Keep training everything that does not load the injury, including legs and conditioning
• Grip and intrinsic hand work once the bone is stable, since stiffness is the usual long term problem, not weakness of the bone
• Tape the finger for the first months back on the mat and expect the joint to stay thickened

Dislocations (shoulder, fingers)

A dislocation means the joint surfaces have come completely apart. The shoulder usually comes out forward when the arm is pulled up and back during a throw or when you land on an outstretched arm, tearing the labrum and stretching the capsule. Finger dislocations happen at the middle joint when a grip is broken violently and the finger is bent backward or sideways.

Symptoms

• An obvious change in the shape of the shoulder or the finger
• Severe pain and an arm you hold against your body and refuse to move
• A joint that feels blocked and springs back if you try to move it
• Rapid swelling around the joint
• Pins and needles or numbness down the arm in shoulder cases

How serious it is: A first time shoulder dislocation in a young athlete carries a high chance of coming out again, because the labrum rarely heals back tight. Finger dislocations without a fracture usually stay stable after being put back, but a dislocation with a chip of bone in the joint is a surgical question. Dislocations accounted for 12.5 percent of injuries in the French competition data.

Typical time out: Six to twelve weeks for a first shoulder dislocation treated without surgery, four to six months after a stabilization operation, and two to six weeks for a simple finger dislocation before full grip returns. Shoulders vary most because the decision to operate depends on age, recurrence, and how much labral damage the scan shows.

See a doctor if: Have it reduced by a medical professional the same day, and go immediately if the arm or finger is numb, pale, or cold, which suggests nerve or vessel involvement.

What helps

• Do not let an untrained partner yank it back in, and do not repeat self reduction as a habit
• Short sling use for comfort only, then early range of motion, since long immobilization does not lower the recurrence rate
• Rotator cuff and scapular strengthening as the core of shoulder rehab, progressing to overhead and load bearing work
• Buddy taping and early movement for fingers, because a stiff finger joint is the usual outcome of over splinting
• Discuss surgery if a young judoka dislocates a shoulder more than once, since repeat dislocations damage the joint further

Concussions

A concussion is a functional disturbance of the brain after a blow or a rapid acceleration of the head, not a structural break visible on a normal scan. In judo it comes mainly from the head striking the mat during a throw, from being driven down in osoto gari or seoi nage, and from head to head contact in grip exchanges. Poor ukemi that lets the head snap back is the mechanism to watch, and a systematic review of 25 judo tournament studies found the head to be the most frequently injured body part.

Symptoms

• Headache or a pressure feeling in the head after impact
• Dizziness, feeling slowed down, or as if in a fog
• Nausea, blurred vision, or sensitivity to light and noise
• Trouble concentrating or remembering the sequence around the throw
• Feeling unusually irritable, tearful, or unable to sleep

How serious it is: There is no useful grading during the event: any suspected concussion means the session ends, whether or not there was loss of consciousness. Most cases resolve within a few weeks; symptoms that persist beyond a month need specialist assessment.

Typical time out: A minimum of one to two weeks before contact, following a stepwise return to play with at least twenty four hours per stage and no symptom return. Persistent symptoms can mean a month or several months away, and repeated concussions in a short window justify a much longer break.

See a doctor if: Go to emergency care for a worsening headache, repeated vomiting, seizure, weakness or numbness in a limb, slurred speech, unequal pupils, or increasing drowsiness.

What helps

• Stop the session immediately and do not return the same day, no matter how quickly you feel better
• Relative rest for the first day or two, then light activity such as walking that stays below the symptom threshold
• Reduce screen time and mental load early, then reintroduce study or work gradually
• Follow a written return to play progression supervised by your coach and a clinician
• Get medical clearance before ukemi and randori, and rebuild falling technique before free practice

Knee Injuries (e.g., ACL tear, Meniscus injury)

The anterior cruciate ligament runs through the middle of the knee and stops the shin from sliding forward and rotating. It tears in judo when a foot is fixed on the mat and the body rotates over it, classically during uchi mata or when defending a throw. The menisci are the two cartilage wedges between the bones; they tear from twisting on a bent, loaded knee, often in the same movement.

Symptoms

• A pop or tearing sensation at the moment of the twist
• The knee swelling within a few hours rather than days
• A feeling that the knee gives way when you turn or step sideways
• Locking or catching, so the knee will not straighten fully
• Deep pain along the joint line when you squat

How serious it is: A partial cruciate tear may leave a stable knee that copes with rehab, while a complete tear usually leaves rotational instability that judo exposes quickly. Small stable meniscus tears at the outer rim can heal; a torn flap that blocks the joint does not.

Typical time out: Nine to twelve months after cruciate reconstruction before competitive judo, and rarely less, since the graft needs time to remodel. Meniscus injuries range from four to eight weeks after a trimming operation to four to six months after a repair that must be protected from deep bending.

See a doctor if: See a doctor promptly if the knee swelled within hours, locks in a bent position, or will not take your weight.

What helps

• Get the swelling down and the knee straight before anything else, since a knee that will not extend heals badly
• Restore quadriceps activation early, because that muscle switches off within days of a knee injury
• Neuromuscular training with landing and cutting drills, which lowers reinjury risk more than strength alone
• Return by criteria, meaning strength and hop symmetry close to the other leg, not by the calendar
• MRI when instability, locking, or a rapid effusion suggests more than a sprain

Cuts and Abrasions

Abrasions are friction burns where the mat or a gi sleeve scrapes off the outer layers of skin, most often on the toes, elbows, and the side of the face during ne waza. Cuts come from fingernails, a partner’s teeth, or the head clash of two judoka driving in for a grip. The judogi weave itself causes mat burn on the neck and jawline during collar grips.

Symptoms

• A raw, stinging patch of skin that weeps clear fluid
• Bleeding that stops with a few minutes of pressure
• Pain that is worst when the area is stretched or sweated on
• Redness spreading around the edge if it becomes infected
• Itching as the area closes over

How serious it is: Most are superficial and heal without a scar. A cut that gapes open, goes through the full thickness of skin, or crosses a joint crease needs closing within hours, and any wound on the mat carries a real infection risk from skin bacteria and fungus shared between training partners.

Typical time out: Usually no time off at all if it can be covered, or a few days for a deeper wound. A cut needing stitches means about seven to fourteen days before gripping and ground work, longer if it opens again.

See a doctor if: See a doctor if the redness spreads, the wound produces pus, or you develop a fever, and get any bite wound or deep facial cut assessed the same day.

What helps

• Clean the wound with running water and cover it before you go back on the mat, for your partners as much as yourself
• Keep it moist under a dressing rather than letting it dry to a hard scab
• Cut and keep fingernails short, which is the single biggest reduction in facial scratches in a club
• Wash the gi after every session and shower promptly, since mat borne skin infections spread through shared kit
• Cover any open wound before rolling, and stay off the mat entirely with an undiagnosed spreading rash

Rotator Cuff Injury

The rotator cuff is four tendons, most often the supraspinatus, that hold the ball of the shoulder centered in its socket. In judo they are loaded by holding a stiff sleeve grip against a partner pulling away, by the sudden traction of being thrown while holding on, and by the repeated overhead pull of uchikomi. Damage ranges from tendon irritation to a partial or full thickness tear.

Symptoms

• Pain on the outer upper arm rather than on top of the shoulder
• Pain when lifting the arm out to the side between roughly sixty and one hundred twenty degrees
• Weakness holding a grip out in front of you
• Pain at night when lying on that shoulder
• Difficulty reaching behind your back to tie the belt

How serious it is: Tendinopathy and partial tears usually respond to loading rehab. A full thickness tear, particularly after a sudden traction injury with immediate weakness, may need surgery, and an acute tear in a younger athlete is repaired sooner rather than later.

Typical time out: Six to twelve weeks for tendinopathy or a partial tear managed with progressive loading, and four to six months or more after a repair, since the tendon must be protected before it can be loaded. The spread is wide because pain often settles long before the tendon tolerates gripping under load.

See a doctor if: Get it examined if the arm was suddenly weak after a specific incident and you cannot hold it out to the side, which suggests a full tear rather than irritation.

What helps

• Progressive loading of the cuff and the shoulder blade muscles, starting isometric and building to heavy slow resistance
• Adjust training rather than stopping, for example lighter uchikomi and no one armed hanging grips for a while
• Fix the pulling pattern, since gripping with a locked elbow and a dropped shoulder blade concentrates load on the tendon
• A corticosteroid injection is at most a short term option to allow rehab, and it tends to worsen tendon outcomes over time, so treat it as an exception
• Imaging if weakness persists beyond a few weeks or night pain does not improve with rehab

Back Pain

Most judo back pain comes from the lumbar muscles, the small facet joints at the back of the spine, or the discs between the vertebrae. The loading pattern is specific: lifting a resisting body while bent and rotated during a throw, arching hard to defend a turn, and absorbing repeated impact on landing. Young judoka who train heavy volume can also develop a stress reaction in the pars, the thin bony bridge at the back of a vertebra.

Symptoms

• A dull ache across the lower back that worsens through a session
• Sharp pain when you bend and twist to lift
• Stiffness getting out of bed or out of a car
• Pain that eases with walking and worsens with sitting, or the reverse
• Pain that shoots into the buttock or down the leg in disc related cases

How serious it is: Nonspecific back pain without leg symptoms is common and usually improves over weeks. Pain radiating below the knee with numbness or weakness suggests nerve involvement, and one sided back pain in an adolescent that hurts on arching needs to be assessed for a stress fracture rather than trained through.

Typical time out: One to four weeks for a simple episode, with modified rather than stopped training. Disc related pain with leg symptoms often takes six to twelve weeks, and a confirmed pars stress fracture in a young judoka usually means about three months of protected loading.

See a doctor if: Seek urgent care for numbness around the groin or saddle area, loss of bladder or bowel control, or progressive leg weakness, and get an assessment for back pain that wakes you at night with fever or weight loss.

What helps

• Keep moving and return to modified judo early, since bed rest makes back pain worse
• Trunk endurance work such as loaded carries, side planks and hip hinge patterns rather than endless sit ups
• Learn to lift with the hips in uchikomi so the load does not sit in a bent, rotated spine
• Manage weekly training volume, especially during weight cutting periods when recovery drops
• Imaging is not needed for most first episodes, but it is warranted for nerve symptoms or one sided pain in a teenager

Neck Pain

Neck pain in judo comes from the muscles and facet joints of the cervical spine, loaded when the head is whipped during a throw, when you bridge out of a hold down, and when you post on your head defending a turnover. The small joints and the deep neck flexors take the strain; disc irritation with nerve pressure is less common but does occur.

Symptoms

• A stiff, sore neck that is worst turning to one side
• Pain that spreads into the upper shoulder blade area
• Headache starting at the base of the skull
• Muscle spasm that pulls the head to one side
• Tingling or numbness down an arm if a nerve is irritated

How serious it is: Muscular and joint irritation settles within days to weeks and allows gradual return. Pain with arm numbness, weakness, or clumsiness in the hands is a different category and needs medical assessment before any contact.

Typical time out: A few days to three weeks for a muscular strain, with mat work resumed as symptoms allow. Nerve related neck pain typically takes six to twelve weeks and sometimes longer, and any suspicion of bony injury means no contact until it has been cleared.

See a doctor if: Stop and get seen urgently if there is numbness or weakness in both arms or legs, an electric shock down the spine, or midline bony tenderness after a hard landing.

What helps

• Gentle range of motion in the first days rather than a collar, since keeping the neck still prolongs the problem
• Deep neck flexor and upper back strengthening, built up gradually before bridging or heavy contact
• Work on ukemi so the chin stays tucked and the head does not strike the mat
• Reduce hold down escapes that load the head until the neck settles
• Get an assessment for pain that persists beyond three to four weeks or comes with arm symptoms

Dislocated Elbow

An elbow dislocation means the ulna and radius are driven out of their fit with the humerus, tearing the collateral ligaments and the joint capsule. In judo it happens when the arm is straightened forcibly, either by an armlock held past the tap or by landing on an outstretched hand during a fall. A hyperextension injury without full dislocation still damages the same ligaments and the anterior capsule.

Symptoms

• A visibly deformed elbow that you hold slightly bent
• Immediate severe pain and an inability to bend or straighten it
• Rapid swelling around the joint
• Numbness or tingling in the little finger or the hand
• A feeling that the joint shifts when the arm is straightened, after it has been put back

How serious it is: A simple dislocation without a fracture usually stays stable after reduction and does well. A complex dislocation with fractures of the radial head or coronoid is unstable and often needs surgery. Loss of full extension afterward is common and is the price of a stiff elbow rather than a loose one.

Typical time out: Six to twelve weeks before grappling after a simple dislocation, and three to six months or more if there is a fracture or a repair. The main limiter is not pain but the return of stable, full movement.

See a doctor if: Go to emergency care the same day, and immediately if the hand is numb, pale or cold, since the nerves and artery run close to the joint.

What helps

• Have it reduced and x rayed in a hospital rather than on the mat
• Splint for a short period only, usually under two weeks, then start moving, because prolonged immobilization causes lasting stiffness
• Active range of motion with the shoulder kept close to the body to protect the ligaments while the elbow moves
• Rebuild grip and forearm strength before returning to kumikata and armlock defense
• Tap early in training; an elbow taken past its limit by a training partner is the mechanism that is fully within your control

Fractures of the Humerus or Forearm

These are breaks of the upper arm bone or of the radius and ulna, usually from landing on an outstretched or twisted arm during a throw, or from rotational force on a trapped arm. The distal radius at the wrist is the most frequent site in falls, while a spiral humerus fracture comes from the arm being twisted under load. The radial nerve wraps around the humerus, which is why weakness lifting the wrist can accompany these breaks.

Symptoms

• Severe pain with an arm you cannot use at all
• Visible bend, shortening, or an unnatural angle in the arm
• Swelling and bruising along the length of the bone
• A grinding sensation when the arm is moved
• Inability to lift the wrist or fingers if the radial nerve is involved

How serious it is: Undisplaced fractures may be treated in a cast or brace. Displaced forearm fractures in adults are almost always plated, since both bones must be restored precisely for the forearm to rotate. Any nerve deficit changes the management and needs specialist follow up.

Typical time out: Roughly six to twelve weeks for the bone to unite, and three to six months before full contact judo, longer after plating or when a nerve was involved. The wide spread reflects the difference between a simple wrist break and a two bone forearm fracture with surgery.

See a doctor if: Treat any suspected arm fracture as an emergency, and go immediately if the skin is broken, the hand is numb or cold, or the forearm becomes tight and increasingly painful.

What helps

• Splint the arm as found and get it x rayed, without trying to straighten it yourself
• Move the shoulder, elbow, and fingers as allowed to prevent stiffness while the fracture heals
• Keep training legs and conditioning so you do not lose overall fitness in three months
• Structured rehab for grip and forearm rotation once the fracture is stable, since rotation is what limits gripping
• Return to falls in stages, starting with rolls onto the good side before any contact

Ankle Sprain

The classic judo ankle sprain is an inversion injury of the lateral ligaments, mainly the anterior talofibular and calcaneofibular ligaments, when the foot rolls under the body. It happens when a foot catches in the mat during a turn for seoi nage, when you post out of a sweep, or when a partner lands on a planted leg. A high ankle sprain of the syndesmosis, above the joint line, comes from the foot being fixed while the leg rotates.

Symptoms

• Pain on the outer ankle just below and in front of the bony bump
• Swelling that appears within an hour
• Bruising that spreads into the foot over a couple of days
• Limping or being unable to put full weight through the foot
• The ankle feeling unreliable on uneven ground weeks later

How serious it is: Grade 1 is a stretch with minimal swelling, grade 2 a partial tear with marked swelling and bruising, grade 3 a complete tear with instability. A high ankle sprain hurts above the joint, is worse on rotation, and takes considerably longer than the ordinary outer sprain.

Typical time out: One to two weeks for a grade 1, three to six weeks for a grade 2, and two to three months for a grade 3 or a syndesmosis injury. Recurrence is the real problem, since around a third of poorly rehabilitated sprains lead to lasting instability.

See a doctor if: Get an x ray if you cannot take four steps on it, if the bone is tender at the back edge of either ankle bone, or if pain sits above the joint and worsens when the leg is twisted.

What helps

• Weight bear early within a pain limit, using crutches only until you can walk with a normal pattern
• Balance training on one leg, then eyes closed, then on a soft surface, continued for months not weeks
• Calf and peroneal strengthening, since those muscles resist the rolling movement
• Tape or a lace up brace for competition and randori for at least six months after a significant sprain
• Reassess if the ankle keeps giving way despite rehab, since that suggests instability rather than incomplete healing

Turf Toe (Sprain of the Big Toe Joint)

Turf toe is a sprain of the ligaments and the small plate of tissue under the joint at the base of the big toe. In judo it happens when the toe is bent sharply upward as you drive off a bare foot on a grippy mat, typically during the turn in for uchi mata or seoi nage, or when the toe is stubbed and jammed into the mat during a sprawl. The same joint can also be injured in the opposite direction when the toe is caught and forced down under a falling partner.

Symptoms

• Pain at the base of the big toe on the sole side
• Swelling and bruising around the joint
• Pain when you push off, especially when turning in for a throw
• Reduced ability to bend the toe upward
• A sense of weakness or looseness in the toe when pushing off

How serious it is: Grade 1 is a stretch of the tissue with local tenderness and normal push off, grade 2 a partial tear with swelling and a clear limp, grade 3 a complete tear where the joint feels unstable and the toe cannot be loaded at all. Grade 3 injuries and those with an associated fracture need specialist assessment.

Typical time out: About one to two weeks for a grade 1, three to six weeks for a grade 2, and two to three months for a grade 3 or after surgical repair. Judo prolongs recovery because barefoot training constantly loads the toe, so pushing back too early frequently restarts the clock.

See a doctor if: See a doctor if you cannot bear weight on the ball of the foot, if the joint looks displaced, or if pain and swelling are still marked after two weeks.

What helps

• Tape the toe to limit how far it bends upward when you return to the mat
• A stiff soled shoe for walking outside training reduces load on the joint through the day
• Rebuild strength of the toe flexors and the small foot muscles before returning to hard turning entries
• Modify entries in the first weeks, favoring techniques that do not pivot on the ball of the foot
• Get an x ray if the joint was jammed hard, since a fracture of the small sesamoid bones under the joint can look identical

Shin Splints (Medial Tibial Stress Syndrome)

Medial tibial stress syndrome is pain along the inner edge of the shin bone where the deep calf muscles and the covering layer of the bone are irritated by repeated loading. Judo produces it through the running, jumping, and shrimping drills in warm ups, through hundreds of repeated entries in uchikomi where the front leg brakes hard, and through the sudden increases in mat volume before a grading or a competition camp. The shin is also a direct impact site, and a bruise on the bone lining from a blocked foot sweep can feel similar.

Symptoms

• A dull ache along the inner shin during and after training
• Tenderness spread over a hand width of the bone rather than one small point
• Pain that eases as you warm up but returns afterward
• Both shins affected at once, often after a jump in training volume
• Discomfort walking on hard floors the day after a session

How serious it is: The mild form hurts at the start of training and settles with movement. The advanced form hurts during the whole session and afterward at rest, which shifts the concern toward a tibial stress fracture, especially if the pain narrows to one small point you can cover with a fingertip.

Typical time out: Two to six weeks with load management for a typical case, and two to three months if it has progressed to a stress fracture, which cannot be trained through. The wide range reflects how long the problem was ignored before the load was reduced.

See a doctor if: See a doctor if the pain concentrates in one small spot on the bone, wakes you at night, or hurts when you hop on that leg, all of which suggest a stress fracture.

What helps

• Reduce the impact volume rather than stopping altogether, keeping technique work and ground work
• Build calf strength, including heel raises with the knee bent to load the deeper muscles
• Increase running and jumping volume in steps of no more than about ten percent per week
• Train on the mat rather than a hard floor for conditioning circuits, and use shoes with cushioning outside the dojo
• Get imaging if the pain is focal and persists despite four to six weeks of reduced load

First Aid for Soft Tissue Injuries: PEACE and LOVE

Sports medicine has moved on from RICE. The current guidance, published in the British Journal of Sports Medicine in 2019, splits care into the first days after the injury and everything that follows.

PEACE, the first two to three days

• Protect: unload the area and limit movement that hurts, but only briefly.
• Elevate: keep the limb above heart level when you can.
• Avoid anti-inflammatories: they may blunt the healing you need.
• Compress: a bandage or taping limits swelling.
• Educate: your body heals this on its own; passive treatments rarely speed it up.

LOVE, from day three onward

• Load: return to movement as pain allows, early loading builds tissue.
• Optimism: expectations shape recovery more than most people assume.
• Vascularization: easy cardio that does not hurt brings blood to the area.
• Exercise: restore strength, mobility and balance before returning to play.

Ice still helps with pain in the first hours. What changed is the evidence that long icing and routine anti-inflammatory drugs slow tissue repair.

How to Lower Your Risk in Judo

• Treat ukemi as a technical skill you keep practicing, not a beginner drill. Most judo injuries happen on landing, and a fall that lets the head snap back or drives an arm out straight is the mechanism behind concussions, elbow and shoulder injuries alike.
• Tap early and let go early. An armlock held one second past the tap and a partner who refuses to release a grip while being thrown produce elbow and shoulder injuries that no amount of conditioning prevents.
• Match randori partners by weight and experience, and speak up when a partner is out of control. Injury rates are highest in young adults, the group most likely to train at competition intensity every session.
• Build the legs for the twisting load of judo: single leg strength, hamstring and adductor eccentric work, and landing and cutting drills. Knee sprains are the injury type that drives the higher recorded injury rate in female judoka.
• Strengthen the neck and the shoulder blade muscles deliberately, since both are loaded constantly in judo and rarely trained directly. Keep fingernails and toenails short as well, which removes most facial scratches in a club.
• Manage the training week and the weight cut. Piling competition camp volume onto a calorie deficit is when back pain, shin pain and tendon problems tend to appear.

When to Stop and Get Medical Help

Most of the injuries on this page are treated at home. These signs are not.

• Any head impact followed by headache, dizziness, confusion, or memory gaps. Stop for the day and do not return to contact until you have been assessed.
• A visibly deformed joint or limb, or a bone that is tender to direct pressure after a hard landing.
• Numbness, tingling, or weakness in an arm or leg, particularly in both limbs at once or with an electric shock feeling down the spine.
• A joint that will not move, locks in position, or gives way completely under your body weight.
• A limb that becomes pale, cold, or increasingly tight and painful out of proportion to the injury.
• Loss of bladder or bowel control, or numbness around the groin, after a back injury. This is an emergency.

Sources

• Frey A et al., Orthopaedic Journal of Sports Medicine, Epidemiology of Judo-Related Injuries in 21 Seasons of Competitions in France
• Translational Sports Medicine, Epidemiology of Injuries during Judo Tournaments

This article is general information, not medical advice. If you are hurt, a doctor or physiotherapist who can examine you is worth more than any web page. Last reviewed: August 2026.

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