With the revolutionary dual-resistance design, your muscles are firing throughout the entire range of motion, on the way down as well as on the way up! You’re doing a reverse crunch against resistance as you lie back and a regular crunch as you come up. And unlike Ab machines in the gym that work through a limited range of motion. Six pack care can go beyond 180 degrees with an extended range of motion to target your core like never before! Its unique ergonomic design focuses the resistance like a laser right on your upper, middle, lower abs and your obliques, so there’s no wasted effort or wasted time!It even has a built in twisting seat so you can target your obliques. Then blast away your waistline by adding a tuck to work the lower abs, or do a lower ab press to really tighten that pooch! Then, when you’re done, lay back for a soothing upper body stretch.That makes the six pack care an incredible “6 in one” total core workout machine! You can do crunches, reverse crunches, obliques twists, lower ab tucks, a lower Ab press and stretches!