The value of the vertical jump is that it show's a player's ability to burst off the line of scrimmage with lower body strength. That's why the drill is important for linebackers and defensive linemen despite the fact that they, in theory, are not jumping around much trying to defend passes.
Wrist tendonitis, also called tenosynovitis, is a common condition characterized by irritation and inflammation of the tendons around the wrist joint. Many tendons surround the wrist joint. Wrist tendonitis usually affects one of the tendons, but it may also involve two or more.
De Quervain's tendinitis occurs when the tendons around the base of the thumb are irritated or constricted. The word tendinitis refers to a swelling of the tendons. Thickening of the tendons can cause pain and tenderness along the thumb side of the wrist.