NEVER BOUNCE

98. NEVER BOUNCE it s amazing that some people ever walk out of i gym. One of the most abused machines in any fitnes. facility is the leg extension. People load the thing up with more weight than they can lift in good style, and then bounce it up and down using body momentum. The amount of stress this places on the knees at the top of the exercise is enormous. It's bad enough if you stop just short of locking out, but many people actually hyperextend at the knee joint when they do leg Extensions. Next to the lower back, the knee is the easiest joint to damage. Always treat knees with kindness!