Injuries in Brazilian Jiu Jitsu

Recent Study on BJJ Injuries: Analyzing Data from 800 Practitioners

Bumps and bruises are inevitable as we journey deeper into our Jiu Jitsu practice. While we strive to mitigate risks, injuries can still occur, often requiring lengthy recovery times. The most crucial aspect of our training is not just learning how to win, but also how to train safely. By understanding where the risks lie, we can shape our behavior for safer and healthier training.

A recent master’s thesis by researchers at the Amsterdam University Medical Center collected data from over 800 BJJ practitioners worldwide. This study aimed to uncover what causes the most injuries in our sport [00:10]. The findings challenge much of the common gym wisdom—especially regarding the most "dangerous" submissions. Let’s break down these fascinating results and explore how we can use this data to stay safer on the mats.

The Most Dangerous Submissions (Spoiler: It’s Not Heel Hooks)

When we think of catastrophic injuries, our minds often jump to leg locks. However, the data paints a very different picture:

• Armbars Take the Crown: The submission responsible for the highest number of injuries and the most training days lost is the armbar [00:43]. While elbow pops tend to heal relatively quickly, the worst armbar injuries occur when the pec tendon tears from the humerus. This can lead to a grueling 6 to 9 months of recovery time [01:00].

  
  

• The Triangle Trap (For the Attacker!): Triangles come in second on the injury list, but with a bizarre twist. Out of 17 reported triangle injuries, 11 happened to the person applying the submission [01:24]. These injuries often stem from poor lock angles and getting stacked, leading to rib, back, and neck issues.

  
  

• Calf Slicers: While not incredibly common, calf slicers resulted in the highest average time lost per injury at 70 days [02:09]. Similar to triangles, the person applying the calf slicer was the one who got hurt in 6 out of the 8 recorded incidents.

  
  

• The Heel Hook Myth: Despite their terrifying reputation, inside heel hooks had one of the shortest recovery times. There was only one reported ACL injury from an inside heel hook, and the athlete returned to the mats within 90 days [02:39].

  
  

The Most Commonly Injured Body Parts

When analyzing where the body takes the most damage, the lower body bears the brunt of the impact:

• Knees: Nothing comes close to the knee. Knee injuries accounted for nearly 10,000 lost training days across the surveyed athletes [03:21]. These injuries occurred across the board: 26% from submissions, 21% from takedowns, and the rest split between guard passing and playing.

  
  

• Shoulders: Coming in at number two, shoulder injuries were evenly split, with 30% occurring from takedowns and 30% from submissions [03:37].

  
  

• Ribs: Rib injuries ranked third. Interestingly, 25% of rib injuries happened from "random stuff" during scrambles, while another 25% occurred while having the guard passed [03:44].

  
  

Competition vs. Training Environment

Are competitions really that much more dangerous than a tough night of training at our local gym? Statistically, yes.

• If we compare 1 hour of gym training to a 5-minute competition match, we are 10 times more likely to get hurt in the 5-minute match [04:17].

  
  

• In competition, 50% of injuries are directly caused by submissions. In the training room, submissions only account for 20% of injuries [04:00].

  
  

• That being said, because we spend exponentially more hours training than competing, the vast majority of overall injuries still occur in the training room.

  
  

Who is Most at Risk?

The data revealed clear physical and demographic trends regarding who is most likely to get sidelined:

• The "Goldilocks" Zone: Practitioners who weigh over 242 lbs (110 kg) or have a BMI under 20 or over 30 face a significantly higher risk of injury [04:54].

  
  

• Age and Experience: Being over 40 naturally increases injury risk. However, there is a massive drop-off in injury rates once a practitioner reaches the purple belt level, or roughly 7 years of training experience [05:18]. By this point, athletes likely possess the defensive awareness and ego-control to keep themselves safe.

  
  

How to Stay Safe on the Mats

To ensure longevity in the sport, creating a safe training environment is vital. John Danaher's submission safety rules offer an incredible framework for this:

1. Controlled Extension: We can extend our partner's arm, but we must never hyperextend it [06:21].

   
   

2. The 3-Second Rule: If we can hold a joint in a state of full extension with control for 3 seconds, we've secured the submission and could have broken it. There is no need to rip it [06:21].

   
   

Furthermore, the data showed that the vast majority of training injuries happen during free sparring. Transitioning more of our gym time to positional sparring and structured games can drastically lower the injury rate [07:02].

Interestingly, the study noted that "warming up" did not statistically correlate to a lower injury rate [07:14]. However, context is key—younger, highly flexible, and experienced athletes might skip warm-ups entirely and still not get hurt, which skews the data. Always listen to your body and prepare it appropriately for the wear and tear of Jiu-Jitsu!

Want to dive deeper into the statistics? Check out the full breakdown in this excellent video by Less Impressed More Involved BJJ: *https://youtu.be/x6BGngGC4Xo

Embracing the Journey Together

As we navigate our Jiu Jitsu journey, let’s remember that personal growth comes from understanding our bodies and respecting our limits. We are all in this together, learning and growing as a community. Let’s support one another in fostering resilience and confidence on and off the mats.

In the spirit of encouragement, let’s reflect on Philippians 4:13: “I can do all things through Christ who strengthens me.” Together, we can create a safe and empowering environment for everyone involved in our practice.