The Wonder Core lets you take advantage of resistance on the way down and up with every repetition so you‎'‎re essentially getting double the workout in half the time‎!‎ This brilliant fitness tool also provides a full 180 degree range of motion‎,‎ meaning you can isolate and train your lower‎,‎ middle and upper abs‎-more more for tighter and faster results‎.‎ A thick foam cushion supports create an invigorating massage up and down your back as you train to help revitalize your spine and back‎.‎ And best of all‎,‎ you‎'‎re nestled in an ultra‎-comfortable seated position with your head and neck fully supported through the full range of motion so anybody can do it‎!