<ul><li>Exercise research and muscle stimulation were the main research topics aboard the International Space Station</li><li>Crew spends two hours daily on workout to counteract the effects of weightlessness including muscle and bone loss</li><li>NASA Flight Engineer conducted experiments to understand the impact of exercising in zero gravity</li><li>Roscosmos' Progress 91 cargo craft is scheduled to dock at the International Space Station on Saturday for a six-month cargo mission</li></ul>

Crew Studies Space Exercise While Waiting for Saturday Delivery

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