What are the differences between performing a pec fly and a rear delt exercise, and how do they target different muscle groups?

Performing a pec fly primarily targets the chest muscles, specifically the pectoralis major and minor. This exercise involves bringing the arms together in front of the body against resistance. On the other hand, a rear delt exercise targets the rear deltoid muscles located at the back of the shoulders. This exercise involves pulling the arms backward against resistance. In summary, pec fly works the chest muscles while rear delt exercises target the muscles at the back of the shoulders.