Participation in sport is associated with a with a 20—40% reduction in all-cause mortality compared with non-participation. Exercise might also be considered as a fifth vital sign, according to the Lancet: http://goo.gl/gyxYf
Dr. Michael Roizen, Cleveland Clinic Chief Wellness Officer, answers the question "How much exercise is enough?"
Three parts of exercise have been shown to be beneficial to health:
1. Moving the equivalent to 10,000 steps a day.
2. Resistance exercise for 30 minutes a week.
3. 20 minutes of cardiovascular exercise.
The videos are part of the Cleveland Clinic Let's Move It! program. See the CEO promoting it: