A study published Online First by The Lancet shows that just 15 minutes of physical activity per day reduces a person's risk of death by 14% and increases life expectancy by 3 years compared with inactive people. The Article is by Dr Chi-Pang Wen, National Health Research Institutes, Taiwan, and China Medical University Hospital, and Dr Jackson Pui Man Wai, National Taiwan Sport University, and colleagues.
On the basis of self-reported weekly exercise, participants were placed into one of five categories of exercise volumes: inactive, or low, medium, high, or very high activity. The authors calculated hazard ratios (HR) for mortality risks for every group compared with the inactive group, and calculated life expectancy for every group.
Compared with individuals in the inactive group, those in the low-volume activity group, who exercised for an average of 92 min per week (about 15 min a day) had a 14% reduced risk of all-cause mortality, a 10% reduced risk of all-cancer mortality, and on average a 3 year longer life expectancy. Every additional 15 min of daily exercise beyond the minimum amount of 15 min a day further reduced all-cause mortality by 4% and all-cancer mortality by 1%. These benefits were applicable to all age groups and both sexes, and to those with cardiovascular disease risks. Individuals who were inactive had a 17% increased risk of mortality compared with individuals in the low-volume group.
If you liked this article, please give it a quick review on ycombinator or StumbleUpon. Thanks