| 摘要 |
A flexible and adjustable training aid for use by all levels and sizes of athletes to teach and practice the proper body position while passing or moving to pass a volleyball. A harness on the athlete's torso and a leg member on the athlete's leg below the knee are connected by a low position member. Detachment of the low position member indicates failure to maintain proper low position. Other attachments indicate whether shoulders are far enough forward or legs are far enough apart.
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