A new study shows that 40 minutes of intense exercise, 3x a week for 10 weeks Improves Fitness and Health

Short, Intense Workouts Improve Fitness and Health

Don’t complain that you do not have enough time to gain the health benefits of exercise. A new study shows that forty minutes of intense exercise, three times a week for 10 weeks:
* increased VO2max,
* lowered blood pressure,
* lowered blood sugar levels,
* reduced body fat, and
* lowered total cholesterol, the bad low-density lipoprotein (LDL) cholesterol, and the oxidized LDL cholesterol that forms plaques in arteries. 

VO2max measures the maximal ability to take in and use oxygen. It is a measure of fitness level that also predicts how long a person is likely to live (Med Sci Sports Exerc 1999;31: S646–662).