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.
You use the tendons and muscles in your wrist to move your wrist in all directions. Tendons can be injured suddenly or they may be slowly damaged over time. You can have tiny or partial tears in your tendon. If you have a complete tear of your tendon, it is called a rupture.ther tendon injuries may be called a strain, tendinosis, or tendinitis. Wrist tendon injuries can be caused by: 1  Overuse of the tendon from a sport or work activity that involves moving your wrist, such as throwing, catching, bowling, hitting a tennis ball, typing, or sewing.