People who exercise as little as 15 minutes a day have a 14 percent lower mortality risk than people who don’t exercise at all.
That statistic covers all causes of death, which translates at age 30 to a three-year increase in life expectancy. When it comes to cancer, those who work out 15 minutes daily are 10 percent less likely to die of it than those who don’t exercise at all.
Every additional 15 minutes of daily exercise reduces the all-cause mortality risk by another 4 percent and the cancer mortality risk by another 1 percent.
C. P. Wen et al., “Minimum Amount of Physical Activity for Reduced Mortality and Extended Life Expectancy.” The Lancet, 2011, doi:10.1016/S0140-6736(11)60749