Rotation chop

Instructions

Stand up, feet apart more than shoulder width, knees bent, arms held together and stretched forward.
Quickly rotate your bust 90 degrees to the left while lowering your hips. Your feet turn but do not change their position. Your left thigh should be almost parallel to the floor (as if you were in the "lunge" position) and your back is straight.
Quickly return to the initial position but do not stop there and turn your bust 90 degrees to the right (like for the left turn).
Continue to alternate these movements.

Muscles