DA VINCI Dual Wheel Ab Exerciser- Abdominal Rollout Equipment with Anti Slip GriEffective exercise device designed to provide one of the best upper body and core building exercises Double wheel design with plastic roller wheels offers added stability, control and support Anti-slip sweat resistant thick textured grips for added safety and a sure grip Designed and manufactured with a metal axle to ensure stability and durability An Abdominal wheel is a simple but incredibly effective abdominal exercise device that when used properly builds strength in your abs and back, resulting in a solid core. An ab wheel works the core muscles in your lower torso, including the rectus abdominis in the stomach area, your hip flexors and the latissimus dorsi, which extend across your back from the pelvis to the shoulder. The most basic roller exercise, the rollout, works all these muscles. You can also use the ab wheel to work out your arms, shoulders and thighs. dual wheel roller is manufactured with the highest quality standards in sporting equipment. The double wheel construction offers added stability and the anti slip grips absorb hand moisture and sweat for a safer more productive exercise. Here is a short instruction on how to use the ab wheel: Hold the Roller with both hands and kneel on the floor. Now place the roller on the floor in front of you so that you are on all your hands and knees as in a kneeling push up position. This will be your starting position. Slowly roll the wheel straight forward, stretching your body into a straight position. Tip: Go down as far as you can without touching the floor with your body. Breathe in during this portion of the movement. After a pause at the stretched position, start pulling yourself back to the starting position as you breathe out. Tip: Go slowly and keep your abs tight at all times. Caution: This exercise is not advised for people with lower back problems or hernias. Variations: If you are advanced you can perform the exercise moving the roller to the sides in a diagonal fashion as opposed to straight forward. This version places more emphasis on the obliques. Payment DetailsWe currently accept payment via PayPal only. Once payment is cleared, we will dispatch your shipment within 1-3 business days. Please refer to the "Shipping" tab for more information regarding shipping speed to your destination.Return PolicyAs our valued customer, we will do our best to make sure the product you receive arrives to you on time and as expected. If you are not satisfied with your purchase, please contact us within 30 days of receiving your order to process a return.