1. Knowledge about the physical exercise. Personnel with the knowledge of exercise. In should warm up before exercise begins every time, about 5-10 minutes per cent 68.89 in during exercise. If symptoms, dizziness, dizziness should stop exercising. คิดเป็น 61 percent.11 and in the proper shoes with the type of exercise. To make the movement skill and reduce the possibility of accident down the percentage of 60.00.
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