I'm not sure. I think for people who start quite heavy and have a blood-sugar imbalance, a more gentle approach to exercise is probably better, rather than vigorously stirring up the blood sugar levels. For slim people with stable blood sugar, it probably works great, as the extra muscle will increase the metabolism. I think Scottie123 made great points in his post.
I have just started two exercise methods, neither of which will disrupt my trigger-happy blood-sugar levels:
One involves 30 secs of vigorous activity, followed by 30 secs of rest, then same thing another 3 times making 2 mins. exercise.
New studies have shown that if you do bursts of intensive exercise, then it is as beneficial as hours spent at the gymn. Here is the full article:
http://www.independent.co.uk/life-s...ss-1605271.html
I've also started Beginning Callanetics, which is a toning programme - very relaxing and gentle, but good for streamlining the body without adding bulk.
The Callanetics is very gentle and relaxing.
Muscle weighs heavier than fat, so when you do these activities, your weight might not change, so you have to guage the results in the way your clothes fit.