Transcription: Weightlessness affects a shuttle astronaut's body almost as if their entire time in space was spent in bed. To counteract this, astronauts engage in daily exercise. An astronaut receives exercise by running on a treadmill while held in place by an elaborate system of bungee cords and harnesses. For flights lasting less than a week, astronauts are advised to get 15 minutes of exercise per day. For missions lasting longer, 30 minutes per day is recommended.
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