That hasn’t stopped buff men from touting the weekly muscle injections as the holy ... “The average guy, I think, definitely sees only the big, ripped guys and they think that’s the norm ...

Brie Larson shows off the muscles ... ripped, as she showed in a video posted to Instagram. In the video, the Academy Award-winning actress does five pull-ups and shows off her insane back muscles.

If your form is incorrect, you're at greater risk of straining your lower back, wrists or knees. 3. It strengthens your core Rowing strengthens the core muscles in your abdomen, lower back ...