Indian-origin astronaut Sunita Williams has been cautioned about the significant health risks she faces during her extended mission aboard the International Space Station (ISS). Dr. Kirsty Lindsay, an aerospace medicine expert, highlighted the physical toll of space missions, including muscle atrophy, bone density loss, and metabolic changes.
Dr. Lindsay described spacewalks as equivalent to the “heaviest gym session” on Earth, with added challenges from microgravity. She noted the critical need for astronauts, including Williams and her fellow astronaut Butch Wilmore, to prepare for reduced atmospheric pressure by breathing pure oxygen in an airlock to prevent decompression sickness. This condition, caused by nitrogen bubbles in the blood, is a common risk during transitions in pressure.
NASA also takes precautions against vertigo and dizziness that astronauts may experience while exiting the airlock, as these disorienting effects can hinder mission safety.
Long-duration spaceflights exacerbate health risks, including muscle atrophy, fluid redistribution, and weight loss. Images of Williams from earlier this year revealed significant weight loss due to the high caloric needs in space. Astronauts require nearly double the calories of those on Earth to sustain themselves in microgravity.
Experts emphasize the importance of rigorous preparation and recovery protocols to mitigate these risks. Williams’ health remains a priority as she continues her challenging mission on the ISS.
