Step-Down

Move · Resistance Training · Movement, Typed Supps

There is no push-off anywhere in it, so the working leg only ever gets to lower — never to drive.

Stage by stage

Set-up (Step height sets the dose): Single-leg stance on a step, with height rather than added load as the primary variable that is progressed.
During the set (Eccentric braking only): The quadriceps control the descent with no concentric push-off available from the standing limb.
Immediately after (Hip abductors hold alignment): Inward knee drift usually signals hip abductor and external rotator weakness rather than a quadriceps problem.
Weeks later (Symmetry becomes measurable): Because it is unilateral and countable, it serves as a return-to-sport criterion after knee injury as well as a training exercise.

Muscles trained

Primary: quads
Secondary: abs, glutes, hip abductors

Intensity

3.5 METs (Resistance (weight) training, multiple exercises, 8-15 repetitions at varied resistance).

Time to effect

Weeks: Control over the knee during the slow lowering phase improves quickly, and wobbling or the knee caving inward usually settles down within a couple of weeks.
Months: Quad strength and side-to-side symmetry keep improving over 2 to 3 months, which is why the exercise is often used to track recovery progress after a knee injury.

Common myth

"A step-down and a step-up train the same thing." In reality: A step-up is a concentric, push-off-dominant movement, while a step-down is built around slow, controlled eccentric lowering with no push-off at all. That deliberate removal of the concentric drive is exactly why clinicians favor the step-down for isolating quad control during rehab.