Sunita Williams and Butch Wilmore bracing for toughest challenge after return – readjusting to Earth’s gravity


Upon their return to Earth on March 19, 2025, NASA astronauts Sunita Williams and Butch Wilmore will face the significant challenge of readjusting to Earth's gravity after spending over eight months on the International Space Station (ISS).

Here are some of the challenges and readjustments they will face:

  • : The shift back to gravity will cause discomfort and a feeling of heaviness as their bodies readjust to gravitational forces. Astronaut Butch Wilmore noted that "even lifting a pencil will feel like a workout".

  • : In microgravity, bodily fluids redistribute, leading to "puffy faces" and thinner limbs. Upon returning to Earth, these fluids will shift back to normal distribution, potentially causing temporary discomfort.

  • : Extended stays in microgravity can cause muscle atrophy and bone density loss. Astronauts may lose up to 1% of their bone mass per month due to the absence of weight-bearing activities.

  • : NASA has planned a rigorous rehabilitation program to help Williams and Wilmore regain strength and adapt to life on solid ground. This program includes physical therapy, cardiovascular conditioning, nutritional support, and neurological readjustment.

  • : Despite the challenges, both Williams and Wilmore remain optimistic and have successfully readjusted after previous missions.


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