NASA astronaut Steve Swanson, Expedition 39 flight engineer, works out on the Advanced Resistive Exercise Device (ARED) aboard the Earth-orbiting International Space Station on April 11, 2014

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Keywords: american, astronaut, astronauts, exercise, exercising, exploration, historic, historical, history, international, mission, nasa, people, person, resistance, space, squat, squats, station, steve, swanson, training, workout