Skating

Ice or inline skating; the side-to-side push loads the outer and inner thigh.

How to do it

Setup

Skates snug, protection as needed, knees bent from the first push.

Steps

Push side-to-back with long strokes.
Stay low – bent knees are both speed and safety.
Log the session by time.

Common mistakes

Straight legs: every wobble becomes a fall; bend. Pushing straight back: the edge grips SIDEWAYS. Looking at the feet: eyes ahead, the feet follow.

Breathing

Steady with the strides.