So you want to strengthen your muscles or improve your posture? The Meidai Rolling Exercise Training Seat can help. By shifting your weight from one side to another, you get to work on your stomach, hips, and back. It also helps you combat incontinence.
More gadgets like this: here
GIE-304 勝野式ゆらゆら美クス
You will have to use this seat for about 5 minutes a day. The above video gives you a better idea how it works.
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