Sunita Williams Return To Earth: Severe Muscle Loss And Other Health Challenges NASA Astronaut Will Face Post-Landing

Microgravity affects blood circulation and heart function, leading to cardiovascular deconditioning. This can cause lower blood volume, making astronauts feel dizzy or lightheaded when standing up. The prolonged exposure to microgravity can also lead to weakened heart muscles, requiring them to readapt to pumping blood efficiently under Earth’s gravity.