תזונה ותוספים Intermittent versus daily calorie restriction: which diet regimen is more effective f

[Mike Bikov]

Obes Rev. 2011 Mar 17. doi: 10.1111/j.1467-789X.2011.00873.x. [Epub ahead of print]
Intermittent versus daily calorie restriction: which diet regimen is more effective for weight loss?

Varady KA.

Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL, USA.
Abstract

Dietary restriction is an effective strategy for weight loss in obese individuals. The most common form of dietary restriction implemented is daily calorie restriction (CR), which involves reducing energy by 15-60% of usual caloric intake every day. Another form of dietary restriction employed is intermittent CR, which involves 24 h of ad libitum food consumption alternated with 24 h of complete or partial food restriction. Although both diets are effective for weight loss, it remains unknown whether one of these interventions produces superior changes in body weight and body composition when compared to the other. Accordingly, this review examines the effects of daily CR versus intermittent CR on weight loss, fat mass loss and lean mass retention in overweight and obese adults. Results reveal similar weight loss and fat mass loss with 3 to 12 weeks' intermittent CR (4-8%, 11-16%, respectively) and daily CR (5-8%, 10-20%, respectively). In contrast, less fat free mass was lost in response to intermittent CR versus daily CR. These findings suggest that these diets are equally as effective in decreasing body weight and fat mass, although intermittent CR may be more effective for the retention of lean mass.
© 2011 The Author. obesity reviews © 2011 International Association for the Study of Obesity.

PMID: 21410865 [PubMed - as supplied by publisher]
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[Mike Bikov]

עושים שטויות, אבל מחקר נחמד:

It is important to note, however, that comparing values for fat mass and fat free mass between studies is difficult as different tech- niques were employed to assess these parameters. More specifically, the majority of daily CR trials implemented dual-energy X-ray absorptiometry (DXA) and magnetic resonance imaging (MRI), while the majority of inter- mittent CR trials employed bioelectrical impedance analysis. It is well known that DXA and MRI are vastly more accurate techniques for the assessment of fat mass and fat free mass when compared to bioelectrical impedance analysis (33). Thus, the different methods employed could create variability when comparing find- ings between diets.
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[Avocado]

איך יכול להיות שבשתי הקבוצות הייתה ירידה זהה במשקל ובאחוז שומן, אבל באחת איבדו פחות מסת שריר?

 

[Mike Bikov]

איך יכול להיות שבשתי הקבוצות הייתה ירידה זהה במשקל ובאחוז שומן, אבל באחת איבדו פחות מסת שריר?

כי מדובר בטווחים באחוזים וסטיות משמעותיות או לא, סטטיסטית.

 

[SpellStorm]

אם מדדו את ה IF ע"י התנגדות חשמלית כל המאמר הזה לפח.