Wonder Core works your abs twice as hard‎‎.‎‎ Sit‎‎-ups and crunches only work your muscles on the way up‎‎;‎‎ Wonder Core reclines‎‎,‎‎ working your core all the way up and all the way down to double the resistance‎‎.‎‎ With 180° of motion‎‎,‎‎ you can isolate and train you lower‎‎,‎‎ middle and upper abs for a toner‎‎,‎‎ tighter core‎‎.‎‎ The recline stretches muscles‎‎,‎‎ helping to relieve back pain‎‎.‎‎ And you can also perform knees tucks and twisting oblique exercises on the swivel seat‎‎.‎‎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!