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Tiangong Space Station! Exercise Like It's 1953

The year - 2021. Here's a pretty cool shot of Shenzhou12 astronaut Nie Haisheng working out to maintain his body for eventual return to Earth:

The year: 1953. Science fiction author Murray Leinster publishes his novel Space Tug, in which he wrote about a gravity-simulator harness for astronauts to maintain a good level of fitness:

"When we got back," Joe told Brown, "we were practically invalids. No exercise up here. This time we've brought some harness to wear. We've some for you, too..." Joe got out the gravity-simulator harnesses. He showed Brent how they worked. Brown hadn't official instructions to order their use, but Joe put one on himself, set for full Earth-gravity simulation.

He couldn't imitate actual gravity, of course. Only the effect of gravity on one's muscles. There were springs and elastic webbing pulling one's shoulders and feet together, so that it was as much effort to stand extended—with one's legs straight out—as to stand upright on Earth. Joe felt better with a pull on his body.
(Read more about Leinster's gravity-simulator harness)

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