Let's talk about knees
Common sense says Listen to your Body and Listen to your Doctor.
If your body is telling you something is wrong, don't wait to see your doctor.
Why do injuries happen?
The main cause of injuries is because two people care too much about the engagement. A good question to ask is :
Are the training partners more concerned with safety
or with catching the submission?
Anterior Cruciate Ligament (ACL)
Medial Collateral Ligament (MCL)
AKA Knee injuries
Knee bars don't feel the same as arm bars in terms of the pain felt before it's too late. If a knee bar is tight, err on the side of caution and tap. Don't test your knee to see how much it can handle.

Twisting, popping of the knee joint can result in tears of various degrees.

If the lockdown is very tight, both partners are at risk if the body moves quickly and unexpectedly in the wrong direction.
Muscular or Ligament damage
The right doctor can help determine whether your injury is ligament or muscular related.
If you hear a loud pop, that's a serious concern. Go see the doctor.
Training Modifications
When easing back on the mat from a knee injury or surgery, keep your legs together and don't use them. You will sharpen your defenses during this time, focus on surviving from the bottom.

Always communicate with your partner your situation and make sure you are both on the same page.
Cooperative Learning Environment
The standards of the Gracie Academy demands that all Certified Training Centers adhere to Safety over Submission. If this sounds appealing to you, find the Certified Training Center nearest you and don't hesitate to visit us at GRACIE DURHAM anytime.