Exercise researcher Dr Mike Israetel is joined by bodybuilder Jesse James West and trainer Jared Feather on his YouTube ...

These important muscles stabilize your back and shoulders and help you move your arm to the front, side ... best workouts to feel the stretch and power of your rear deltoid muscles.

Here's how you can go from barely bendy to doing perfect front and side splits in just a few weeks—including the exact stretches you need to give Simone Biles a run for her money. When learning ...

This week: seated deltoid stretch. After a weekend hard at the mill (read: office), your shoulders are up by your ears and your back is screaming. Those deltoids work hard every day and yet ...