Step-ups are a great exercise for both beginners and elite athletes because you can gradually increase the difficulty of the exercise by increasing the step height, the weight lifted, and even the speed of the movement during the exercise. … The higher the step, the more the hamstrings and glutes are worked.
Will step ups build muscle?
Step-ups hit all the major muscle groups in your lower body. The quads bear the brunt of the action but the move works your glutes, hamstrings and calves too. That means that as well as improving your stair-climbing game, step-ups will improve your strength and resilience for sports like running and cycling.