Internal rotation strengthens the subscapularis muscle, an important part of rotator cuff. Attach a resistance band to a ...

YOU WON'T BE able to build big arms without training smart ... Tuck your elbows in tight to the sides of your body, and get into external rotation. You'll still get the elbow extension you ...

Lie on your left side and extend your left arm in front of you ... You have four main muscles that aid movement including shoulder rotation (internal and external) and abduction and help perform ...