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.
Tendons are cords of tough, fibrous connective tissue that attach muscles to bones. Tendinitis is an inflammation of the tendon. The condition may also involve the tendon sheath, usually close to where the tendon joins the muscle. Tendinitis is also informally spelled tendonitis.Tendons are generally healthy structures that appear glistening white to the naked eye. Achilles tendinitis is caused by downhill running, jumping, or other activities that can strain the calf muscles. 2  Peroneal tendinitis is inflammation of the tendon that is located in the side of the ankle and foot. 3  Excessive hiking, tennis, or many other activities may cause peroneal tendinitis.