1. Lie on floor with knees up, lower legs parallel to floor.
2. Place tubing around one foot; use other foot to squeeze tubing between feet, keeping it secure.
3. Work upper body and lower body separately to start; extend arms overhead or do shoulder press, return to start.
4. Extend legs away from body, keeping back secured to floor; return to bent knee position.
5. Alternate between arms and legs, or extend both arms and legs simultaneously.