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[i]The suit arms rotate at the shoulder and can get rotated around like that. Usually doesn't happen since the elbow bends better if rotated to the normal orientation. On a space suit, the internal pressure makes it hard to bend the suit so you don't want the pressure to get higher when bending a joint. So there are "constant pressure" joints with more material on the back side to allow the suit to bend normally without changing internal volume. If the volume decreased while bending a joint, the pressure would go up, making the suit stiffer. So that allows bending them in one direction more easily. I don't know if it started that way when I put on the suit (I can't see the shoulder very well from inside) or if it got rotated while working. We were trying a lot of ISS assembly tasks so did a lot of arm work. I did not notice it during the EVA and it didn't constrain me in any noticeable way. One other possible explanation for the rotation — we were testing a new electronic wrist checklist. It was strapped to your arm. To see the screen it needed to be oriented in a particular way so I may have rotated the arm to see the screen. It was easier to rotate the arm than it was to loosen the strap and rotate the checklist.[/i]
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