What action is most likely to be painful for a person with bicipital tendonitis?

Active and resisted glenohumeral (shoulder) flexion will likely be painful for someone with bicipital tendonitis. This involves inflammation and pain at the long head of the biceps muscle. Pressing on the tendon around the bicipital groove of the humerus will increase symptoms. The special test used to identify biceps muscle or tendon involvement is known as Speed’s test.