NASA astronaut and Expedition 67 Flight Engineer Bob Hines works out on the Advanced Resistive Exercise Device (ARED) inside the International Space Station's Tranquility module. The ARED mimics the inertial forces generated when lifting free weights on Earth enabling crew members to experience load and maintain muscle strength and mass during a long-term space mission.

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Photo credit: © NASA/piemags / Alamy / Afripics
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