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J Nutr. 2015 Apr;145(4):681-90. doi: 10.3945/jn.114.201574. Epub 2015 Jan 28.

Habitual physical activity and plasma metabolomic patterns distinguish individuals with low vs. high weight loss during controlled energy restriction.

Author information

1
Obesity and Metabolism Research Unit, USDA Agricultural Research Service Western Human Nutrition Research Center, Davis, CA; West Coast Metabolomics Center, University of California, Davis, Genome Center, Davis, CA; and.
2
Obesity and Metabolism Research Unit, USDA Agricultural Research Service Western Human Nutrition Research Center, Davis, CA; Department of Nutrition, University of California, Davis, Davis, CA.
3
West Coast Metabolomics Center, University of California, Davis, Genome Center, Davis, CA; and.
4
Obesity and Metabolism Research Unit, USDA Agricultural Research Service Western Human Nutrition Research Center, Davis, CA; West Coast Metabolomics Center, University of California, Davis, Genome Center, Davis, CA; and Department of Nutrition, University of California, Davis, Davis, CA john.newman@ars.usda.gov.

Abstract

BACKGROUND:

Total weight loss induced by energy restriction is highly variable even under tightly controlled conditions. Identifying weight-loss discriminants would provide a valuable weight management tool and insights into body weight regulation.

OBJECTIVE:

This study characterized responsiveness to energy restriction in adults from variables including the plasma metabolome, endocrine and inflammatory markers, clinical indices, body composition, diet, and physical activity.

METHODS:

Data were derived from a controlled feeding trial investigating the effect of 3-4 dairy product servings in an energy-restricted diet (2092 kJ/d reduction) over 12 wk. Partial least squares regression was used to identify weight-loss discriminants in 67 overweight and obese adults. Linear mixed models were developed to identify discriminant variable differences in high- vs. low-weight-loss responders.

RESULTS:

Both pre- and postintervention variables (n = 127) were identified as weight-loss discriminants (root mean squared error of prediction = 1.85 kg; Q(2) = 0.43). Compared with low-responders (LR), high-responders (HR) had greater decreases in body weight (LR: 2.7 ± 1.6 kg; HR: 9.4 ± 1.8 kg, P < 0.01), BMI (in kg/m(2); LR: 1.0 ± 0.6; HR: 3.3 ± 0.5, P < 0.01), and total fat (LR: 2.2 ± 1.1 kg; HR: 8.0 ± 2.1 kg, P < 0.01). Significant group effects unaffected by the intervention were determined for the respiratory exchange ratio (LR: 0.86 ± 0.05; HR: 0.82 ± 0.03, P < 0.01), moderate physical activity (LR: 127 ± 52 min; HR: 167 ± 68 min, P = 0.02), sedentary activity (LR: 1090 ± 99 min; HR: 1017 ± 110 min, P = 0.02), and plasma stearate [LR: 102,000 ± 21,000 quantifier ion peak height (QIPH); HR: 116,000 ± 24,000 QIPH, P = 0.01].

CONCLUSIONS:

Overweight and obese individuals highly responsive to energy restriction had accelerated reductions in adiposity, likely supported in part by higher lipid mobilization and combustion. A novel observation was that person-to-person differences in habitual physical activity and magnitude of weight loss were accompanied by unique blood metabolite signatures. This trial was registered at clinicaltrials.gov as NCT00858312.

KEYWORDS:

body composition; branched-chain amino acids; calorie restriction; metabolomics; obesity; physical activity; respiratory exchange ratio; statistical modeling; weight loss

PMID:
25833772
PMCID:
PMC4381764
DOI:
10.3945/jn.114.201574
[Indexed for MEDLINE]
Free PMC Article

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