character: David Smith
topic: Effects of Warm-up on Muscle Performance
grade: 9
subject: Science
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character: John Doe
topic: Muscle Physiology and Performance
grade: 9
subject: Science
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character: Emily Johnson
topic: Importance of Warm-up Before Exercise
grade: 9
subject: Science
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character: Michael Brown
topic: Impact of Stretching on Athletic Performance
grade: 9
subject: Science
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