Abdominal back trainer is not only a kind of fitness equipment, but also can relieve the back fascia strain of people with lumbar muscle strain. 60 times a day, divided into two groups, will relax the back.

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Correctly regulate actions

No matter whether your head is up or down, always lie on the board with your waist. When the head is up, the upper body should cling to the board, and the legs of the lower body should slightly clamp the knees. When lifting the legs, the thighs are at right angles to the body. Pay attention to the reduction of legs, and slowly fall back so that your feet don't land. Then slowly lift it up. When your head is lowered, tighten your chin, open your sides with your hands, touch your ears, and don't hold your head! The head and shoulders should leave the board (all the way), and the upper back can leave the board with the contraction of abdominal muscles, and then slowly recover.

Source: Key Network Baidu Encyclopedia