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Calisthenics for Beginners: Step-by-Step Workouts to Build Strength at Any Fitness Level: Schifferle, Matt: 9781646111688: Amazon.com: Books
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Frontiers | Exercising With a Six Pack in Virtual Reality: Examining the Proteus Effect of Avatar Body Shape and Sex on Self-Efficacy for Core-Muscle Exercise, Self-Concept of Body Shape, and Actual Physical
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