Slowly lower back to the starting position. Repeat for 10 repetitions. This exercise targets your shoulders and core — and hits a lot of other muscles for full-body engagement! Start in a full ...
'The rear delts (known as the posterior deltoids) are the muscles on the backside of the shoulders,' says Macy Pruett, CPT, a certified personal trainer and the founder of Fittest Core. 'They sit on ...