Both running and skipping rope puts pressure on your lower body and has some impact on your joints. They work on your core muscles and help to provide stabilisation. Apart from that, running involves your buttocks to move forward, shoulders (deltoids) and sustained flexion of the biceps to balance your leg movement. In jumping rope, your buttock muscles are involved which helps to keep your pelvis stable. It also involves your shoulder, biceps, triceps, and forearm flexor grip.