Functional characteristics: It is equipped with a lower limb fixed blocking handle and an arc-shaped training device with an upward convex surface. The trunk part can lie on the arc platform for forward flexion and backward extension training, with the help of the arc surface for abdominal muscle strength training and stretching the joints of the whole body. It is suitable for patients who need to strengthen abdominal muscle strength training. It is also a good helper for sit-ups. Product property: 138 47 50cm,The adjustment range of the distance between the hook foot pad and the sea surface pad is 30 ~ 42 cm (4 gears, 40 mm for each gear), and the rated load is 135 kg.