Causes & Symptoms
Tears in the distal biceps tendon, partial or complete, are generally caused by rapid and/or forced extension of the elbow. It is uncommon for a tear to occur simply because of heavy lifting alone; rather, an unexpected load can force the arm to straighten and tear the tendon.
Pain typically occurs during the acute injury (sometimes accompanied by a pop sound) but subsides after one or two weeks. Bruising on the arm is likely, but other visible symptoms are uncommon if the tear is partial. Noticeable weakness in the arm is almost certain, especially with twisting motions.