Crunches with legs: Quickly build 8-pack abs

Crunches are considered to be the only way to build abdominal muscles. Since the lower back is required to stay on the ground when doing crunches,

< p> Therefore, abdominal crunches are smaller than sit-ups, are safe and reliable, and stimulate the abdomen more continuously.

In order to increase the intensity, you can put a piece of equipment between your legs. The weight depends on your personal ability.

This way, you can get faster and more explosive results than traditional crunches. A set of 20, fast shaping in 30 days!