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Jennifer Parkin and Joseph Grassadonia 5/19/26 Jennifer Parkin and Joseph Grassadonia 5/19/26

Inside Astronaut Training: What Christina Koch Reveals About Human Performance

Astronaut Christina Koch reveals how spacewalking challenges the body and mind — from marathon-level exertion in a pressurized suit to the strength, endurance, recovery, and focus required to perform in microgravity.