MODEL RELEASED. Strength training. Woman using a resistance training machine in a gymnasium. Strength training is the use of resistance (gravity, elas

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MODEL RELEASED. Strength training. Woman using a resistance training machine in a gymnasium. Strength training is the use of resistance (gravity, elastic or hydraulic forces) to oppose muscular contraction. This builds the strength, endurance and size of muscles.

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Size: 4992px × 3328px
Photo credit: © MARK TURNBALL/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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