Cited by 271Muscle metabolism and nutritionNutrition and Health in AgingBody Composition Measurement Techniques

Higher compared with lower dietary protein during an energy deficit combined with intense exercise promotes greater lean mass gain and fat mass loss: a randomized trial

Open access
Longland, Thomas M, Oikawa, Sara Y, Mitchell, Cameron J, Devries, Michaela C, Phillips, Stuart M·2016·The American Journal of Clinical Nutrition

Abstract

Background A dietary protein intake higher than the Recommended Dietary Allowance during an energy deficit helps to preserve lean body mass (LBM), particularly when combined with exercise.Objective The purpose of this study was to conduct a proof-of-principle trial to test whether manipulation of dietary protein intake during a marked energy deficit in addition to intense exercise training would affect changes in body composition.Design We used a single-blind, randomized, parallel-group prospective trial. During a 4-wk period, we provided hypoenergetic (~40% reduction compared with requirements) diets providing 33 ± 1 kcal/kg LBM to young men who were randomly assigned (n = 20/group) to consume either a lower-protein (1.2 g · kg(-1) · d(-1)) control diet (CON) or a higher-protein (2.4 g · kg(-1) · d(-1)) diet (PRO). All subjects performed resistance exercise training combined with high-intensity interval training for 6 d/wk. A 4-compartment model assessment of body composition was made pre- and postintervention.Results As a result of the intervention, LBM increased (P < 0.05) in the PRO group (1.2 ± 1.0 kg) and to a greater extent (P < 0.05) compared with the CON group (0.1 ± 1.0 kg). The PRO group had a greater loss of fat mass than did the CON group (PRO: -4.8 ± 1.6 kg; CON: -3.5 ± 1.4kg; P < 0.05). All measures of exercise performance improved similarly in the PRO and CON groups as a result of the intervention with no effect of protein supplementation. Changes in serum cortisol during the intervention were associated with changes in body fat (r = 0.39, P = 0.01) and LBM (r = -0.34, P = 0.03).Conclusions Our results showed that, during a marked energy deficit, consumption of a diet containing 2.4 g protein · kg(-1) · d(-1) was more effective than consumption of a diet containing 1.2 g protein · kg(-1) · d(-1) in promoting increases in LBM and losses of fat mass when combined with a high volume of resistance and anaerobic exercise. Changes in serum cortisol were associated with changes in body fat and LBM, but did not explain much variance in either measure. This trial was registered at clinicaltrials.gov as NCT01776359.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.3945/ajcn.115.119339

Cites

34 of 34 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Longland, T. M., Oikawa, S. Y., Mitchell, C. J., Devries, M. C., & Phillips, S. M.
Affiliations
McMaster University (CA)
Corresponding author
Phillips, Stuart M
Venue
The American Journal of Clinical Nutrition
Publisher
Elsevier BV
Published
2016-03
Volume
103
Issue
3
Pages
738-746
ISSN
0002-9165 (ISSN-L)
OpenAlex
W2259417356
Cited by
271
References
34
Citations by year
2026: 34 · 2025: 18 · 2024: 26 · 2023: 29 · 2022: 26 · 2021: 24 · 2020: 27 · 2019: 21 · 2018: 28 · 2017: 30 · 2016: 8
FWCI
19.88
Type
journal article
Language
en
Open access
Locations
  • American Journal of Clinical Nutrition (publishedVersion)
  • PubMed (publishedVersion)
  • ResearchSpace (University of Auckland) (submittedVersion)
Funders
Natural Sciences and Engineering Research Council of Canada (RGPIN-2015-04613)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Health Sciences › Medicine › Physiology › Nutrition and Health in Aging
  • Health Sciences › Medicine › Physiology › Body Composition Measurement Techniques
Keywords
dietary protein, negative energy balance, lean body mass, fat loss, body composition, resistance training, high-intensity interval training, serum cortisol, protein supplementation, weight loss, young men, exercise performance, 4-compartment model, anaerobic exercise, muscle protein synthesis, muscle protein degradation, fat oxidation, substrate oxidation, energy expenditure, fat mass
MeSH terms
Adipose Tissue, Adult, Body Composition, Body Fluid Compartments, Energy Intake, Diet, Dietary Proteins, Physical Exertion, Humans, Hydrocortisone, Male, Nutritional Requirements, Prospective Studies, Exercise, Single-Blind Method, Caloric Restriction, Resistance Training, Young Adult

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review