with the ab rocket, the design supports your neck and back, so you can tone your abs doing crunches, reverse crunches and side exerces that are now made easy. ab rocket adjusts to you, with three sets of cylinders to adjust your resistance level. so whether you're increasing strength as you progress or adjusting to your fitness level from beginner to seasoned athlete, ab rocket has the right momentum for you. and the cushioned headrest is simple to adjust to fit almost any height. listen to this-- if you've tried doing pilates in the past but it just left you with a pain in the neck, ab rocket is also a pilates assister, 'cause it supports your neck and back. now, fun pilates exercises like scissors or the hundreds are made easier and pain-free. it's a surefire way to sculpt that lean, sexy body you've always wanted. ab rocket is made with gym-quality steel that's built to last, so it's durable, yet it's lightweight and compact, so you can take it with you. and the sleek cushioned backrest folds down easily in seconds to store under the bed or almost anywhere.