This weight training machine trains the abdominal muscles providing several advantages over other abdominal training exercises or machines,such as 1. combines weight resistance training with a controlled motion that is also natural to the physiology of the human body2. minimizes stress to other par.....
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This weight training machine trains the abdominal muscles providing several advantages over other abdominal training exercises or machines,such as 1. combines weight resistance training with a controlled motion that is also natural to the physiology of the human body2. minimizes stress to other par.....
[更多]
Technology is explained in the patent.
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