Aerobic Step Platform

How to adjust

Add or remove risers/blocks under the platform to change its height.
Pick a height where, with your whole foot on the platform, your thigh stays no higher than hip level (about 90° at the knee or less): beginners use the bare platform, and if your knees complain, take a riser out.

Set the platform to your desired height using the risers.
Step up onto the platform leading with one foot fully, bringing the trailing foot up.
Step back down with control, alternating which leg leads.

Check the platform and risers are locked together securely and sitting flat on the floor before stepping on, since a wobbly or uneven platform is the main fall risk.
Tired legs are when the edge catches you: the moment you start clipping the edge or gasping, finish on the floor — step both feet down and rest instead of pushing one more round on the platform.
Place your whole foot on the platform each step rather than just the toes.
Keep the stepping area clear of other equipment.