15m

Fifteen Minutes of Daily Exercise:

Fifteen minutes a day of exercise adds three years to your life, according to FuturePundit.

HOUSTON -- Taiwanese who exercise for 15 minutes a day, or 92 minutes per week, extended their expected lifespan by three years compared to people who are inactive, according to a study published today in The Lancet.

"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."

92 minutes per week of exercise is 4784 minutes per year, which is about 80 hours. Over twenty years, then, you'll pay for your extra time: you'll be spending one thousand, six hundred hours exercising. It's still a good bargain, though, since three years contain over twenty-six thousand hours.