The bicep is particularly susceptible to overuse injuries, especially in individuals performing repetitive lifting activities. It is connected to the shoulder by a long tendon that passes through a groove in the upper arm bone (humerus). The bicep tendon, in turn, is held in the humerus by a ligament. If this ligament becomes injured or stretched, the tendon is not held firmly in place and it slides in the groove causing severe discomfort and pain and, in some cases, leads to bicipital tendonitis. Other causes of pain and discomfort may include poor lifting techniques and conditioning. Tendonosis is another bicep problem and is caused by repetitive elbow flexion against resistance at the distal portion of the biceps at the elbow. The triceps is the strong muscle at the back of the upper arm. It, too, is susceptible to injury. Tricipital tendinitis can develop at the triceps insertion in the elbow (olecronon) and can be caused by overuse and repetitive resisted elbow extension. The Cho-Pat Bicep/Triceps Cuff applies dynamic circumference pressure to the upper and lower portions of the bicep and triceps muscles. This action spreads out the stress and direct pull on the muscle attachments which helps (1.) to reduce the likelihood of developing bicipital tendinitis/tendinosis or tricipital tendinitis (2.) to ease existing bicep/triceps pain and discomfort. Sizing: Measure Around The Arm At Mid-Bicep. Note: If you are between sizes, we suggest you order the smaller size.