Comments on: Comparing the Diets: Part 4

By: lylemcd

lylemcd — Wed, 17 Feb 2010 23:00:45 +0000

You couldn’t be more wrong.

Here’s one of about 300 reviews.

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Int J Sports Med. 2000 Jan;21(1):1-12.
Exercise and insulin sensitivity: a review.

Borghouts LB, Keizer HA.

Department of Movement Sciences, Maastricht University, The Netherlands. lars.borghouts@bw.unimaas.nl

Physical activity has a beneficial effect on insulin sensitivity in normal as well as insulin resistant populations. A distinction should be made between the acute effects of exercise and genuine training effects. Up to two hours after exercise, glucose uptake is in part elevated due to insulin independent mechanisms, probably involving a contraction-induced increase in the amount of GLUT4 associated with the plasma membrane and T-tubules. However, a single bout of exercise can increase insulin sensitivity for at least 16 h post exercise in healthy as well as NIDDM subjects. Recent studies have accordingly shown that acute exercise also enhances insulin stimulated GLUT4 translocation. Increases in muscle GLUT4 protein content contribute to this effect, and in addition it has been hypothesized that the depletion of muscle glycogen stores with exercise plays a role herein. Physical training potentiates the effect of exercise on insulin sensitivity through multiple adaptations in glucose transport and metabolism. In addition, training may elicit favourable changes in lipid metabolism and can bring about improvements in the regulation of hepatic glucose output, which is especially relevant to NIDDM. It is concluded that physical training can be considered to play an important, if not essential role in the treatment and prevention of insulin insensitivity.

By: John

John — Wed, 17 Feb 2010 22:32:59 +0000

you say that exercise elevates insulin sensitivity to high levels temporarily??? what on earth are you talking about. this is 100% untrue!! insulin sensitivity is drastically reduced right after a workout, you are basically severely insulin resistant for 30 min to an hour due to your elevated cortisol.

By: Jim

Jim — Fri, 15 Jan 2010 05:07:12 +0000

Thanks for writing this great summary – I’ve been reading a lot on nutrition lately, especially the Paleo stuff, and this helps put it in perspective. Now I will proceed to demonstrate how a little knowledge is a dangerous thing.

Regarding carb addiction, I read somewhere that if you feel an intense craving for carbs, and the idea of eating a piece of fruit doesn’t sound very satisfying but a Ho Ho sounds great, this might be more than just a low blood sugar-driven craving. It could be a genuine addiction to processed food additives: milk and wheat protein concentrates that bind to opioid receptors, MSG to stimulate appetite, fructose that disrupts the “full” signal to the brain, and on and on … What do you think of the notion that carb addicts are often “additive addicts” who may have a genetic pre-disposition to get higher on this stuff than your average joe?

By: NUO

NUO — Thu, 30 Jul 2009 18:23:26 +0000

I find that people willing to take the time to provide nuanced answers, rather than just yelling one point of view are more often correct. I think your evaluation is the best I’ve seen, period. The medical community is slowly catching up. A new study in Annals of internal medicine (Boden et al, Effect of a low-carb diet on appetite ….) was one of the first to study low carb diet in insulin resistant people (diabetics) on Lockdown i.e. no cheating. The subjects could eat anything or any amount just within the diet. It found good amount of weight loss that came because these people were low activity, insulin resistant, carb addicts. Once the carbs were removed they were able to eat only the amount of calories their bodies needed without any other prodding or restriction.
So it’s all about body type like you stated.
Excellent work. I wish others, especially doctors were as open minded and sophisticated as you. Maybe we would have prevented the food pyramid driven obesity-diabetes epidemic that we are now facing.

By: JJ

JJ — Mon, 16 Mar 2009 03:55:20 +0000

This is incredible. I have Crohn’s AND am narcoleptic…I just finished a Master Cleanse after a particularly heavy carb period…I do tend to be a carboholic. After the cleanse, I was really energetic…after reintroducing carbs, I find it really affected me. Now I understand the mechanics (yeah, I’m a research dork) and am going to try something different. The hubby doesn’t care as much as I do about the weight gain, so he can have the carbs!

Many many thanks!

By: Fabian

Fabian — Fri, 16 Jan 2009 23:10:20 +0000

Thank you for the insight into the different diet types and clearing all that up. (I was one of the ‘just eat less’ people, but would get hungrier after eating carbs). I’m going to look into the TKD or CKD. Thanks heaps!