18. ISS Astronauts Exercise 2 Hours Per Day
Do you think your fitness buff? ISS astronauts must work out at least two hours per day. That’s because the human body tends to lose muscle and bone mass while in space.
This create a variety of health issues. So astronauts are on a strict exercise regimen every day (including Sundays!)
They run on treadmills, use specially designed weight, and perform a variety of other activities all designed to help improve muscle mass. Think you can handle the astronaut workout?