The general rule of thumb with step-ups is height before load: determine the appropriate height first, then choose an appropriate load to accomplish the reps you plan to perform. With the side step-up in particular, the maximum height is determined by how far forward you can move the working knee, or put simply, how much…
Start with a low step beside you and use only your bodyweight at first. As your strength and stability improve, you can progress to holding a pair of dumbbells. Keep your hips level throughout the movement. If the step is too high, maintaining this position will be difficult. A common mistake is pushing off with…