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-   -   Eating majority of calories at night spares muscle (http://www.catalystathletics.com/forum/showthread.php?t=191)

Neal Winkler 11-15-2006 04:11 PM

Eating majority of calories at night spares muscle
 
Keim NL, Van Loan MD, Horn WF, Barbieri TF, Mayclin PL.
Weight loss is greater with consumption of large morning meals and fat-free mass is preserved with large evening meals in women on a controlled weight reduction regimen. J Nutr. 1997 Jan;127(1):75-82.


The purpose of this study was to determine whether meal ingestion pattern [large morning meals (AM) vs. large evening meals (PM)] affects changes in body weight, body composition or energy utilization during weight loss. Ten women completed a metabolic ward study of 3-wk weight stabilization followed by 12 wk of weight loss with a moderately energy restricted diet [mean energy intake +/- SD = 107 +/- 6 kJ/(kg.d)] and regular exercise. The weight loss phase was divided into two 6-wk periods. During period 1, 70% of daily energy intake was taken as two meals in the AM (n = 4) or in the PM (n = 6). Subjects crossed over to the alternate meal time in period 2. Both weight loss and fat-free mass loss were greater with the AM than the PM meal pattern: 3.90 +/- 0.19 vs. 3.27 +/- 0.26 kg/6 wk, P < 0.05, and 1.28 +/- 0.14 vs. 0.25 +/- 0.16 kg/6 wk, P < 0.001, respectively. Change in fat mass and loss of body energy were affected by order of meal pattern ingestion. The PM pattern resulted in greater loss of fat mass in period 1 (P < 0.01) but not in period 2. Likewise, resting mid-afternoon fat oxidation rate was higher with the PM pattern in period 1 (P < 0.05) but not in period 2, corresponding with the fat mass changes. To conclude, ingestion of larger AM meals resulted in slightly greater weight loss, but ingestion of larger PM meals resulted in better maintenance of fat-free mass. Thus, incorporation of larger PM meals in a weight loss regimen may be important in minimizing the loss of fat-free mass.

Steve Shafley 11-15-2006 06:14 PM

Now you've got the big questions:

Does it apply in males?

What were the macronutrient breakdowns of both the total diet and the evening meals?

Plus, metabolic ward means "so damn obese they are in the hospital" doesn't it? If that's the case, that's a significant thing to consider.

Neal Winkler 11-15-2006 07:32 PM

No, metabolic ward just means they stayed at the hospital so precise data that they are 99% sure is accurate could be taken. Anyone can be in a metabolic ward study.

Robb Wolf 11-25-2006 09:39 AM

I asked Prof. Cordain about this a while back. Any type of food partitioning along the intermittent fasting line appears to be helpful for insulin sensitivity but he felt that emulating the ancestral pattern- Lions share of calories in the afternoon evening would yield better results. The Warrior Diet certainly advocated this. Good stuff!


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