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Int J Prev Med. 2014 Apr;5(4):447-56.

Calorie shifting diet versus calorie restriction diet: a comparative clinical trial study.

Author information

  • 1Department of Clinical Nutrition and Dietetic, National Nutrition and Food Technology Research Institute, Faculty of Nutrition and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
  • 2Department of Food and Nutrition Policy and Planning Research, National Nutrition and Food Technology Research Institute, Faculty of Nutrition and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
  • 3Department of Pharmacognosy, Phytochemistry Research Center, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
  • 4Medical School, Islamic Azad University, Najafabad, Isfahan, Iran.
  • 5Department of Nutrition, School of Health, Iran University of Medical Sciences, Tehran, Iran.
  • 6Department Physiology and Physiology Research Center, Iran University of Medical Sciences and Nano Vichar Pharmaceutical Ltd, Tehran, Iran.

Abstract

BACKGROUND:

Finding new tolerable methods in weight loss has largely been an issue of interest for specialists. Present study compared a novel method of calorie shifting diet (CSD) with classic calorie restriction (CR) on weight loss in overweight and obese subjects.

METHODS:

Seventy-four subjects (body mass index ≥25; 37) were randomized to 4 weeks control diet, 6 weeks CSD or CR diets, and 4 weeks follow-up period. CSD consisted of three phases each lasts for 2 weeks, 11 days calorie restriction which included four meals every day, and 4 h fasting between meals follow with 3 days self-selecting diet. CR subjects receive determined low calorie diet. Anthropometric and metabolic measures were assessed at different time points in the study.

RESULTS:

Four weeks after treatment, significant weight, and fat loss started (6.02 and 5.15 kg) and continued for 1 month of follow-up (5.24 and 4.3 kg), which was correlated to the restricted energy intake (P < 0.05). During three CSD phases, resting metabolic rate tended to remain unchanged. The decrease in plasma glucose, total cholesterol, and triacylglycerol were greater among subjects on the CSD diet (P < 0.05). Feeling of hunger decreased and satisfaction increased among those on the CSD diet after 4 weeks (P < 0.05).

CONCLUSIONS:

The CSD diet was associated with a greater improvement in some anthropometric measures, Adherence was better among CSD subjects. Longer and larger studies are required to determine the long-term safety and efficacy of CSD diet.

KEYWORDS:

Calorie shifting diet; calorie restriction diet; obesity; resting metabolic rate; weight loss

PMID:
24829732
PMCID:
PMC4018593
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