• Question: How munch muscle mass did the astronauts loose

    Asked by 748tch48 to Charlie 🚀 on 23 Jun 2016.
    • Photo: Charles Laing

      Charles Laing answered on 23 Jun 2016:

      Hi 748tch48,

      Astronauts spend 2 hours a day exercising but even after this they return with muscle loss.

      The amount of muscle mass lost depends on each individual and which muscles in the body. For example the ‘weight bearing’ of the legs lose much more than the arms for example.

      The arm muscle size in space can actually get bigger as the astronauts use their arms to move about the Space Station instead of their legs!

      Charlie 🚀

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