Hollow Rock

General and Specifics

• this ab exercise strengthens and improves the stability of your core

Starting Position

• lay your back on the ground or a fitness mat
• brace the core the pull the abs to the floor
• roll in the back, until only the lower back and hip have contact to the ground
• your arms are stretched out above your head, so that your upper arms are right next to your ears
• the legs are together and hover across the floor

Correct Execution

• swing back and forward in a controlled motion, keep the back arched
• keep the angle of the legs
• do this for a longer period of time

tip for the workout

• beginners should start with only holding the final position (isometric workout), then go over to the swinging motion