Crunch On Swiss Ball Expolsive

While lying face up on a swiss ball, drop your head back into your interlocked hands looking straight up. Tighten your core and lift your upper torso straight up and slightly forward. Keep your core flexed the whole time, the ball still and focus on a fast paced crunch still using full range of motion, and a breath out at the to.

If the ball is moving around you are going too fast. Keep your neck and shoulders relaxed.