Astronauts exercise for hours daily using special machines and straps in space because zero gravity causes their muscles and bones to weaken, making even basic activities like standing difficult after months in orbit.
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Why Astronauts Exercise in Space追加:
In zero gravity, astronauts don't use their muscles the same way.
That's why astronauts exercise for hours using straps and special machines to stay strong.
After months in space, even standing can feel overwhelming.
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