Ab Roller Ls9030 / Ab Crunch Safely Works Your Core Instantly. Perform effective abdominal crunches at any fitness level with the Ab Roller Evolution. A multi-functional tool, this ab workout piece can be reversed to help you complete a total body workout. Work your core instantly and easily with just one piece of equipment. For a more advanced session, add weight to this ab roller machine for extra resistance. While you’re performing your workout, this machine offers support to your neck, head and upper body to help reduce strain. This compact piece of equipment is small enough to fit in any size home gym without taking up a lot of space. You can now do all of your abdominal exercises from the comfort of your home gym with this ab exercise machine.