says
Fair Play first
The Chinese are studying our Soviet textbook BIOMECHANICS 1977, so Chinese athletes used to play topspin "from the upper shoulder". On the contary, for the many poor-educated tutors it became an ill habit to force children to play "from the elbow." This is an utter mistake, look at the kinematic scheme, and you will see the disadvantage a young athlete gets into when playing from the elbow apex..
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