| NASA astronaut Steve Lindsey, commander of STS-133, |
exercising on the International Space Station
Photo credit NASA via Wikimedia Commons
I have found this to be true in my own life as well. The nights I don't sleep well are when I am trapped inside all day writing a paper or watching videos on the Internet. My uncle is a rancher in Wyoming and says he has never has trouble sleeping. It is really nice to see a study like this to confirm my own anecdotal experience.
So, if you do have trouble getting through the night, try to find a half hour each day to ride a bike, run, swim, hike, lift, climb, whatever works for you.