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Muscle loss studies

Mon, 04/09/2007 - 8:27am — jwitt

Muscle loss studies

I have not read anywhere that diet without exercise preserves muscle mass. Here is the opposite - that resistance exercise preserves LBM: "Bryner RW, Ullrich IH, Sauers J, Donley D, Hornsby G, Kolar
M,Yeater R. Effects of resistance vs. aerobic training combined with an 800
calorie liquid diet on lean body mass and resting metabolic rate. Journal of the American College of Nutrition. 1999 Apr; 18(2):115-21.-" The only study I saw that diet alone was as effective as exercise was that one that showed up on yahoo, the one that admitted it had type 2 error and that although they saw no differences there may have been one.

On muscle mass and its effect on BMR, I have seen studies on both - some show no increase and some show as much as 20kcal / lb. What makes this difficult is the timing - there have been a few studies that show that EPOC (excess post oxygen consupmtion) is increased between 24-48 hours after resistance training. Not sure if multiday training (say 4 days on) would increase this further and therefore skew RMR measurements.

John

Thu, 04/12/2007 - 4:50pm — Daniel Leib

Re: Muscle loss studies

EyeOfTheTiger wrote:
I recall hearing about some studies that found that dieting without exercise did not result in any significant muscle loss

That'd be a straight out lie through statistics, or a study done on people with excptionally high bodyfats. If you do find one of those again, please post it here so we can rip it a new one.

-Dan

Tue, 04/24/2007 - 7:39pm — Guest

Muscle loss studies

Here's an interesting one on the preservation of LBW, despite an EXTREMELY low cal diet.

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dop...

Thu, 04/26/2007 - 9:56pm — Daniel Leib

Muscle loss studies

EyeOfTheTiger wrote:
Here's an interesting one on the preservation of LBW, despite an EXTREMELY low cal diet.

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=10204826

The human body is an amazing organism. To not lose significant lean mass on 800kcal a day for that long is frickin' mind boggling to me.

I would have to question why they didn't cite their method of bodyfat assessment, however. Since it was done in conjunction with a medical school I'd assume DEXA, though if they used something else with that heavy a population the results are pretty suspect.

-Dan