Comment Re:How you get hooked (Score 5, Interesting) 700
The minimum amount of exercise was, interestingly enough, 4 one minute sprints on an exercise bicycle, all out, as hard as you can go with no holding back. You can take a break after each sprint for a short while to catch your breath. Do this twice a week.
The test subject and controls were from time to time given a glass of glucose water, and the experimenters measured how long it took to clear the sugar from the blood.
The theory was this. The muscles have a ready reserve of energy and resist taking more from the blood unless you deplete some of it. Experiments indicate that the benefits of this "minimum" exercise program last for weeks after ceasing it.
This is not my field and I could not tell you why sugar in the blood is bad for you, or why certain sugars are worse. However, I understand that the Berkley Wellness Letter and Science/Nature are evidence based publications. Anyone not credulous can spend about an afternoon looking these things up, though a library is probably better than the internet because many relevant publications are not free.