Add Yahoo as a preferred source to see more of our stories on Google. The chest is a powerful muscle group, but it’s not a complicated one. It’s composed primarily of two muscles (the pectoralis major ...
Medically reviewed by Theresa Marko, PT, DPT, MS Key Takeaways Abduction moves your arm or leg to your sides, away from the midline.Adduction brings your arm or leg back toward the midline.These ...