You know from my posting that I know how important insulin is. I never stated it was irrelevant in one of my posts. My post alluded to insulin is not the be all end all of dieting.
If you are creating a caloric deficit, you will lose fat. Studies are showing more and more the irrelevance of the GI. The GI was directly the result of insulin response as to controlling diet.
While insulin is indeed our most anabolic hormone, again, when it comes to dieting, caloric deficit is the bottom line. If insulin was indeed the key to losing weight, this surely disputes it....
General Clinical Research Center, Department of Medicine, School of Public Health, University of Minnesota, Minneapolis, MN, USA.
1.
[email protected]
Reducing the dietary glycemic load and the glycemic index was proposed as a novel approach to weight reduction. A parallel-design, randomized 12-wk controlled feeding trial with a 24-wk follow-up phase was conducted to
test the hypothesis that a hypocaloric diet designed to reduce the glycemic load and the glycemic index would result in greater sustained weight loss than other hypocaloric diets. Obese subjects (n = 29) were randomly assigned to 1 of 3 diets providing 3138 kJ less than estimated energy needs: high glycemic index (HGI), low glycemic index (LGI), or high fat (HF). For the first 12 wk, all food was provided to subjects (feeding phase). Subjects (n = 22) were instructed to follow the assigned diet for 24 additional weeks (free-living phase). Total body weight was obtained and body composition was assessed by skinfold measurements. Insulin sensitivity was assessed by the homeostasis model (HOMA). At 12 wk, weight changes from baseline
were significant in all groups but not different among groups (-9.3 +/- 1.3 kg for the HGI diet, -9.9 +/- 1.4 kg for the LGI diet, and -8.4 +/- 1.5 kg for the HF diet).
All groups improved in insulin sensitivity at the end of the feeding phase of the study. During the free-living phase, all groups maintained their initial weight loss and their improved insulin sensitivity. Weight loss and improved insulin sensitivity scores were independent of diet composition.
In summary, lowering the glycemic load and glycemic index of weight reduction diets does not provide any added benefit to energy restriction in promoting weight loss in obese subjects.
The first response to this I can hear now....but we are bodybuilders, not obese. Physiology does not change.
Now, if contest level bodyfats are at issue, there may be some change. But, I can use N=1 data, my last contest I "saved" calories for night. In other words, I did not want to go to bed hungry. I was of course hypocaloric, and energy deficient for the day. Some nights I would have yogurt and protein, other nights eggs and vegetables, and others meat and beans. I achieved 5% bodyfat and placed second in my class. This is an indisputable fact, I did it.
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