Common BJJ injuries and how to prevent them

I am a heavyweight, so people ask me about injuries more than they ask the lighter coaches. The assumption is that I have a catalogue of horror stories. I have a few, but almost none of them came from the thing the person asking is worried about.

Almost nobody loses training time to a choke, which is the thing beginners picture. That does not make a strangle harmless; going out is a medical event, not a party trick, and a coach who treats it casually is telling you something about the room. But the injuries that actually cost people months are duller than that, and most of them are decisions rather than accidents.

What actually hurts people

Three patterns account for most of what I see.

The first is a late tap. Somebody knows they are caught, decides to ride it out one more second, and the joint goes before the hand moves. Nobody has ever gotten tougher that way. They just traded six weeks of training for four seconds of pride.

The second is intensity mismatch. Two white belts in month four who both decide the round matters. Nothing technical goes wrong; they just go at eleven, and one of them lands wrong.

The third is volume. Somebody falls in love with the sport, trains six days in their first two weeks, and their connective tissue, which adapts much slower than their lungs and their enthusiasm, gives out somewhere. It is the least dramatic thing on this page and one of the most common. The warning sign is soreness that is worse after each session instead of better.

The list

Knees

This is the one worth a section of its own, because a bad knee is the injury most likely to cost somebody a season rather than a fortnight.

Modern No-Gi has a large leg-lock game. That is not a bad thing; leg entanglements are legitimate positions and everybody should learn them. But the knee is a hinge that does not like rotation, and a heel hook applies rotation directly to it, often without the warning pain an armbar gives you. By the time it hurts, something may already have moved.

So the rule in leg entanglements is different from the rule everywhere else in jiu-jitsu. Everywhere else, you can be patient and work your escape. In a heel hook you tap when the position is locked, rather than waiting for pain to tell you. And you do not spin out. A lot of the worst knee injuries in this sport come from the escaping person's own rotation, which is a horrible way to hurt yourself.

The other knee injury is unglamorous: your partner lands on your planted leg while passing. Keep your feet off the mat when you are on bottom, and be aware of where your weight is going when you are on top. That is basic positional hygiene, and it is the kind of thing our beginners class covers step by step, in a class built entirely for new students.

The skin part nobody warns you about

Ringworm, staph, and impetigo are real in every contact sport, and a skin problem is a likelier reason to miss a week in your first year than anything in the table above. They are also the easiest to prevent, and prevention is mostly on you rather than on the gym.

Shower as soon as you get home, not after dinner. Wash your rash guard and shorts after every single session, never twice from the bag. A small, closed cut can be covered with a waterproof patch; anything open or weeping means you stay off the mat until it closes. If you find a spot that is round, raised, and itchy, stay home and go get it looked at rather than guessing, and tell a coach. A week off for a skin issue you treated is a small thing; a month off because you trained through it and spread it is not. Cleaned mats do half the work, and the other half is what you do in the twenty minutes after class.

Month four is riskier than month one

Brand-new students get hurt less often than you would guess. They move slowly, they cannot yet generate the kind of force that breaks anything, and everybody in the room is being careful with them.

In my experience the injuries start turning up around month three, when the panic has gone and the ego has arrived. You now know enough to fight hard for a position and not enough to know which fights are worth having. This is when people blow out fingers, wrench their own backs escaping, and hold onto submissions past the tap.

Then it settles down again. By a year in, most people have been humbled enough times to relax, and relaxed grapplers get injured far less. If you want a sense of how that arc feels from the inside, no-gi jiu-jitsu for beginners walks through the first month in more detail, and what the first class looks like covers the part before any of it.

Four habits that remove most of the risk

1. Tap early and tap often. Nobody in the room is counting your taps. I tap in training every week.
2. Start in a beginners class rather than jumping into an all-levels room. You get the positions and the escapes before you need them under pressure.
3. Pick your partners for the first six months. You are allowed to say no to a round. If somebody goes too hard with you twice, train with somebody else and tell a coach.
4. Tell the coach about the old injury on day one. A bad knee, a fused disc, or a shoulder that dislocates is not a disqualification here. Let your coach know before class about any injury, condition, or learning difference and they will adapt accordingly, because every technique can be modified and every drill can be scaled. That only works if we know.

One more thing you can do tonight, before you ever book a class: trim your nails and buy athletic tape. Two cheap items, and they save more training days than most of what you will be tempted to buy instead. Ears are the other preventable one, and cauliflower ear covers that in full.

Common questions

Is BJJ safe for a beginner?

It is one of the gentler combat sports to start, because nobody is punching you and because sparring is optional until you want it. There is still impact: takedowns, falls, and a heavier partner landing where you did not plan. Most of the risk sits in how hard the two of you decide to go, and that is the part you get a say in.

How often do people actually get injured?

Minor stuff is routine: sore fingers, a stiff neck, a bruise you cannot explain. Injuries that stop training for a week or more are much less common, and they tend to cluster in the people training five or six days a week or getting ready to compete. Two or three sessions a week with early taps is a very quiet way to train, and two to three a week is what we recommend for beginners anyway.

What is the most common serious injury in jiu-jitsu?

The knee, usually in a leg entanglement. Most of the fix is behavioural rather than technical: tap when the position is locked rather than when it hurts, and do not rotate out of a heel hook.

I have a bad back. Can I still train?

Usually, yes. Tell the coach before class, and expect them to change what you do rather than tell you to sit out. Our standing rule is that you let a coach know about any injury, condition, or learning difference beforehand and they adapt accordingly, because every technique can be modified and every drill can be scaled.

If you want to try it with the guardrails on, our beginners class runs Monday, Wednesday, and Friday at 6:00 PM in Ashburn and the first one is free: book a trial, or if Sterling is the easier drive, book there instead.