Roughly the time you spend watching TV commercials

Less than 15 minutes.

A study of more then 400,000 Taiwanese concludes that just 15 minutes of light exercise a day will extend your pathetic life by three years.

Your risk of dying decreases four percent for each additional 15 minutes of exercise a day.

Light exercise includes: falling out of bed, reaching for the remote, putting on your socks ... wait, I just made that up.

"Exercising at very light levels reduced deaths from any cause by 14 percent," said study senior author Xifeng Wu, M.D., Ph.D., professor and chair of The University of Texas MD Anderson Cancer Center Department of Epidemiology. "The benefits of exercise appear to be significant even without reaching the recommended 150 minutes per week based on results of previous research."

So if you don't want to die, get out there and do something.