Set-up: Lying on the ground by a cable tower, find an attachment that can securely lock to the upper portion of your foot. Securely fasten your foot.
Lift: Lift your working foot towards your body, without using momentum or changing the angle at your knees or hips. Lower your toes below perpendicular to the floor and repeat.
Repetitions: Perform all prescribed reps on one side, then on the other. This counts as one set.
