Set-up: Position a stable box or jumping platform next to you. The platform should be roughly knee height. Standing sideways to the platform, brace through the core, pull your shoulder blades back and establish a neutral spine position. Place your nearest foot onto the box, and distribute your weight across your heels.
Movement: Place your weight across the heel of the elevated foot, and raise your other leg up and onto the box. Drive through the raised leg and do not attempt to push off using the other side. Make sure that the knee of your elevated leg tracks in a line with your toes. Lower the off leg back to the start position under control on each repetition. Be sure to repeat the exercise on the opposite side.
Repetitions: Perform all prescribed reps on one side, then on the other. This counts as one set.
Optional weighting: When you are ready, the movement may also be weighted with dumbbells, barbells, chains and weight vests. If you have access to them, the chains and weight vests are the least obtrusive method.
Assists: While starting the movement it may help to use a shorter box and build up the height over time.
Instructions and effects for the Side Step-Ups exercise 
