Michael Menna, DO, is a board-certified, active attending emergency medicine physician at White Plains Hospital in White Plains, New York. There are 24 muscles in the upper and lower arm, each ...

Learn what muscles pull-ups work, including lats, arms, shoulders, core, grip roles and mechanics. Start training!

Jun 29, 2026, 11:04 PM ET Philadelphia Phillies outfielder Brandon Marsh has been flexing his muscles all month, and that continued in Monday night's 11-7 loss to the visiting Pittsburgh Pirates at ...

Gains are just around the corner.

Background Few interventions reduce patellar tendinopathy (PT) pain in the short term. Eccentric exercises are painful and have limited effectiveness during the competitive season. Isometric and ...