RitFit Evolution Abdominal Machine Exercise Crunch Roller Workout Exerciser Tone and sculpt your core muscles with this easy-to-use crunch tool.Allows you to perform effective abdominal crunches at any level. Sturdy, ergonomic design will help eliminate back and neck strain often associated with crunches. Supports your neck, head and upper body perfectly. Works your core instantly. Flips over for a total body workout. Advanced ergonomic protective and no assembly needed headrest helps to provide comfort and relieve pressure/pain on your head while training. Our new headrest made from high-quality, high-density, thick EVA foam for increased durability. Add to cart and try RitFit 2018 New Ab Fitness Crunch Now! Can do wonders to slim the midsection and tighten the abdominal area. Can use for sit ups, dips and total body workout. Allows you to perform effective abdominal crunches at any level. Will help eliminate back and neck strain often associated with crunches. Use our AB t<span class="a-text-italic">rainer</span>to tone and sculpt your core muscles effectively! Sturdy&amp;ergonomic design, easy-to-use crunch tool. Easy assembly and ideal for home use. Cushioned headrest for support, made of durable steel. Material: Durable steel Weight Capacity: 220 lbs Whole size: 22.5 x 24.5 x 27.0 (L x W x H) inches Package include: 1 x AB fitness crunch, 1 x workout instruction Always start slowly and listen to your body to know what level of exercise is right for you. Use proper breathing. Exhale as you curl up and inhale as you lower down. Make sure your rest you head on the pad and keep your low back in contact with the floor. Using an Ab trainershould decrease neck and back pain, not make it worse. For more detailed information&amp;exercises, refer to out workout instruction.