This will make
your back slim
Abdomen
exercise
Level 1
side stretching
Sit on the device and cross your legs. Twist
your upper body with your hands. Stay still
and do the same turning the other way.
Level 2
bridge
Lie on the ground with your hands touching the floor. Put one leg on the
device and the other straight up.
Focus on your abdomen strength and put your waist up and dow.
Rest for a bit and do the same with the other leg on slim wave.