Stress obviously interferes with sleep, but lack of sleep can also impact your stress level. "In experimental studies, if you're restricting sleep, you see higher levels of cortisol, which is a stress hormone," says Knutson. This is likely related to the increased activity of the sympathetic nervous system that can occur as a result of poor sleep.
Credit: Ibai Acevedo / Getty Images
Powered By ZergNet
The New NFL
Andrew Luck and the Super-Athletes Making Football Faster, Meaner, and More Fun
Plus: A New Approach to Heart Health
ON NEWSSTANDS NOW
Building Haiti's Dream Team: Basketball's Biggest Longshot
The War on Sharks
Sign up to receive the Men’s Journal newsletter and special offers from MJ and its marketing partners.