Start standing - skates parallel, at hip distance and forward facing - lower body bending at the knees into crouch - simultaneously extend arms out to front of the body, parallel and to shoulder height - push upwards through legs raising the body slightly - simultaneously roll one leg forwards on the heel wheels of skates into full extension - reverse action rolling the leg back to crouch and change the rolling leg - alternate legs with a rhythmic action - the exercise is fast paced really challenging the muscular strength and endurance of the legs - continue for 1 minute.