Feature: Powerful ab workout Defines upper,middle,lower and oblique abs Get an attractive waist and defines abs It can also do some yoga exercises to exercise the flexibility of your arms, legs, feet, waist and back, so that the body can coordinate and balance. Boys can use this exercise to have eight pack abs, arm muscle lines, latissimus dorsi, firming buttocks. Girls can use this exercise to have thin arms, breast enlargement, thin waist, abdomen, lifting leg lines, firming buttocks.