It is a commonly held perception that getting in shape and staying there requires hard work and hours upon hours of training. New research shows the opposite - it seems that only four minutes of vigorous activity three times per week is enough to be fit and healthy.

Regular training improves maximal oxygen uptake (VO2max), which is a well-established measure of physical fitness. However, just how much exercise, and how intense that exercise should be to deliver the biggest benefit remains to be defined.

Continued at MedicalNewsToday>>