It's no surprise, then, that "Popeye" sign is usually seen in people 55 and older, though some serious tennis players and golfers may experience a biceps tendon tear at a younger age.

The muscle tends to ball up, forming a “Popeye” bulge that doesn’t improve. It usually is accompanied by swelling, bruising, cramping and extreme pain, as well as loss of function.

Popeye domain-containing proteins (POPDC) are a family of proteins that play crucial roles in muscle function and cardiac health. These proteins are essential for maintaining the integrity and ...