Body gets very weak: The skeletal muscle system gets very weak once you get into space because of gravity.
Heart gets very weak: Many parts of the cardiovascular system, including the heart, are influenced bygravity. On Earth, for example, the veins in our legs work against gravity to getblood back to the heart. Without gravity, however, the heart and blood vesselschange – and the longer the flight, the more severe the changes.
You are very sick and you might have more than 1 disease because of your travel to space.
Fitness Suffers: Reduced blood flow to the muscles, combined with the loss of muscle mass, impacts aerobic capacity. This is a measure of aerobic fitness, or the maximum amount of oxygen that the body can use during exercise.
You Lose Bone: Research shows that a 3.5 percent loss of bone occurs after 16 to 28 weeks of spaceflight. About 97 percent of this loss happens in weight-bearing bones, such as the pelvis and legs. IT would affect your bones massively.
Your immune system suffers: This means that it will be very easy for you being in space may cause a big disease that could be deadly since your immune system suffers and loses its powers to the diseases.