Physorg.com, a science website, reports that cardiovascular fitness can be improved, and the risk of diabetes reduced, by brief, high intensity workouts:
A regular high-intensity, three-minute workout has a significant effect on the body’s ability to process sugars. Research published in the open access journal BMC Endocrine Disorders shows that a brief but intense exercise session every couple of days may be the best way to cut the risk of diabetes.
According to the article:
The subjects in this trial used exercise bikes to perform a quick sprint at their highest possible intensity.
Apparently for only three minutes.
No more excuses not to exercise?