Jack Groppel, Master Professional, answers the question, “I’ve heard you […]
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Serving footwork: Choose the weapon that...
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by Jack Groppel, Ph.D.
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Jack Groppel, Ph.D., answers the question, “At the recent USPTA […]
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Communication helps eliminate fear of lo...
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by Jack Groppel, Ph.D.
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Jack Groppel, Ph.D., addresses the question, “I understand the point […]
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Train your muscles for the long or short...
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by Jack Groppel
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Jack Groppel answers the question, “I have read and heard […]
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The case for forward movement depends on...
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by Jack Groppel
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Jack Groppel, Ph.D., addresses the following inquiry, “My question is […]
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Keep it simple - the best approach to st...
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by Jack Groppel, Ph.D.
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Jack Groppel, Ph.D., addresses the question, “Can you continue with […]
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Qualitative analysis
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by Jack Groppel, Ph.D.
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Jack Groppel, Ph.D., answers the question, “In your work in […]
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Developing risk-taking habits
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by Jack Groppel, Ph.D.
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Jack Groppel, Ph.D., answers the question, “Reaching most levels of […]
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Balance critical to better tennis
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by Jack Groppel
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Jack Groppel addresses the following, “I have read so much […]
