When astronauts return to Earth, they experience several physical effects due to the readjustment to Earths gravity. Here are some of the effects:

• Orthostatic hypotension: Astronauts may experience dizziness when standing up due to the stronger gravity on Earth, which makes it more difficult to deliver blood from the heart to the head.

• Muscle and bone loss: Astronauts may experience a significant loss of muscle and bone mass over time due to the lack of gravity in space. This can lead to weaker bones and muscles, making it difficult to walk and move around after returning to Earth.

• Cardiovascular issues: The heart may not be as efficient at pumping blood throughout the body after returning to Earth, which can cause dizziness or lightheadedness.

• Balance and coordination issues: Astronauts may experience balance issues and problems with coordination when they return to Earth, as their otolith organs need to readjust to the force of gravity.

• Swelling: Astronauts may experience swelling in their face due to the accumulation of fluids in the upper body.

• Fatigue: Astronauts may experience fatigue due to the heavy workload and shifting schedules during spaceflight.

It is worth noting that NASA and other space agencies have developed rehabilitation programs to help astronauts recover from the physical effects of spaceflight.