As you gain proficiency in the standard step-up, increase the difficulty of the exercise by
continuing to find higher steps. Never go so high that you can’t maintain an arch in the low
back and the pelvis in a neutral position or slightly tilted back. Do not let the lower back
round or the pelvis tuck under. Going ultrahigh encourages lumbar flexion and posterior
pelvic tilt, which you should avoid. This variation is a favorite glute exercise of many of my
female clients and, when performed correctly, provides an excellent single-leg strengthening
stimulus.