Spider-Man Push-UpMuscles targeted: chest, triceps, shoulders, coreHow to:Get into a push-up position with your hands underneath your shoulders and your head, hips and heels in line (not shown).Do a standard push-up, then bring one foot forward and place it to the outside of your hand. Do another push-up with your foot forward, then return your foot to the start and do another standard push-up.