Brazilian Jiu-Jitsu (BJJ) is an excellent combat sport for developing strength, mobility, coordination, and fitness. But like any physical activity, it comes with a risk of injury, particularly because training involves grappling, joint locks, takedowns, repetitive movements, and sustained positions. Understanding the most common BJJ injuries can help practitioners recognize problems early, manage them appropriately, and return to training safely. Why Do BJJ Injuries Happen?