What happens to your body in space?

INDIANAPOLIS (WISH) – Have you ever wondered what happens to your body in space?

NASA said when you are in space you may be uncomfortable, disoriented, and experience motion-sickness.

“As soon as you arrive in weightlessness, the fluids start shifting in your body. Your organs of balance and your inner ear immediately sense there’s no gravity pulling down on ’em anymore. All of your joints and your muscles also sense that,” Dr. John Charles, NASA Human Research Program said.

Researchers said they have been studying the effects on humans in space for the past 15 years.

NASA astronaut, Scott Kelly, is helping researchers learn more about how our bodies react in space. Kelly spent nearly a year on the International Space Station (ISS).

“As you spend more time in space, you lose muscle mass, your bones gradually lose calcium. They gradually lose structural integrity because they’re not fighting the force of gravity,” Dr. John Charles said.

An important activity for astronauts on the ISS is exercise. They spend about 2 hours a day exercising.

“Sometimes you’ll feel a little bit stuffier, like you’ve got allergies or something like that. You can lose up to 2.5% of your bone density in a– in a month in space. And this is very, very important part of counteracting that,” Mike Hopkins, Astronaut said.

In addition to exercise, astronauts must be cautious to what they consume. Food scientists are working to make sure astronauts are happy with their food system. For example, on a mission to Mars the food must stay good for five years. Scientists said this is a difficult task for them. They said they are also working on growing green peppers, tomatoes and lettuce in space, as well as other nutrients.CNN contributed to this report.