Evidence map›Paper›PMID 27782114›Full record

Trial reportEuropean journal of clinical nutrition2017

Less-than-expected weight loss in normal-weight women undergoing caloric restriction and exercise is accompanied by preservation of fat-free mass and metabolic adaptations.

K Koehler, M J De Souza, N I Williams

Abstract readRandomized Controlled Trial
PubMed Publisher
In one paragraph

Trial report in European journal of clinical nutrition, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

20 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Guideline
  2. Trial
  3. Article
  4. Article
  5. Article
  6. Review
  7. Review
  8. Article
  9. Review
  10. Does eating less or exercising more to reduce energy availability produce distinct metabolic responses?Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2023
    Review
  11. Review
  12. Article
  13. Article
  14. Review
  15. Article
  16. Review
  17. Review
  18. Response.Medicine and science in sports and exercise · 2019
    Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

K KoehlerDepartment of Kinesiology, Pennsylvania State University, University Park, PA, USA.ORCID 0000-0002-9618-2069
M J De SouzaDepartment of Kinesiology, Pennsylvania State University, University Park, PA, USA.
N I WilliamsDepartment of Kinesiology, Pennsylvania State University, University Park, PA, USA.

Funding

WRITING AND THE DAILY EXPERIENCE OF ILLNESSM01RR010732 · NCRR · PENNSYLVANIA STATE UNIV HERSHEY MED CTR · PI DONG, CHENG · 1995 to 2009
$29.8M
BIOENERGETICS OF EXERCISE-INDUCED MENSTRUAL DISTURBANCESR01HD039245 · NICHD · PENNSYLVANIA STATE UNIVERSITY-UNIV PARK · PI WILLIAMS, NANCY IMBODEN · 2001 to 2003
$1.3M
NCRR NIH HHS M01 RR010732NICHD NIH HHS R01 HD039245
6 · The paper itself

Abstract

BACKGROUND/

objectivesNormal-weight women frequently restrict their caloric intake and exercise, but little is known about the effects on body weight, body composition and metabolic adaptations in this population. SUBJECTS/

methodsWe conducted a secondary analysis of data from a randomized controlled trial in sedentary normal-weight women. Women were assigned to a severe energy deficit (SEV: -1062±80 kcal per day; n=9), a moderate energy deficit (MOD: -633±71 kcal per day; n=7) or energy balance (BAL; n=9) while exercising five times per week for 3 months. Outcome variables included changes in body weight, body composition, resting metabolic rate (RMR) and metabolic hormones associated with energy conservation.

resultsWeight loss occurred in SEV (-3.7±0.9 kg, P<0.001) and MOD (-2.7±0.8 kg; P=0.003), but weight loss was significantly less than predicted (SEV: -11.1±1.0 kg; MOD: -6.5±1.1 kg; both P<0.001 vs actual). Fat mass declined in SEV (P<0.001) and MOD (P=0.006), whereas fat-free mass remained unchanged in all groups (P>0.33). RMR decreased by -6±2% in MOD (P=0.020). In SEV, RMR did not change on a group level (P=0.66), but participants whose RMR declined lost more weight (P=0.020) and had a higher baseline RMR (P=0.026) than those whose RMR did not decrease. Characteristic changes in leptin (P=0.003), tri-iodothyronine (P=0.013), insulin-like growth factor-1 (P=0.016) and ghrelin (P=0.049) occurred only in SEV. The energy deficit and adaptive changes in RMR explained 54% of the observed weight loss.

conclusionsIn normal-weight women, caloric restriction and exercise resulted in less-than-predicted weight loss. In contrast to previous literature, weight loss consisted almost exclusively of fat mass, whereas fat-free mass was preserved.

Indexed as

Basal MetabolismCaloric RestrictionExerciseWeight LossAdolescentAdultBody CompositionBody Mass IndexDietDietary CarbohydratesDietary FatsDietary ProteinsFemaleHumansPatient ComplianceRetrospective StudiesDietary CarbohydratesDietary FatsDietary Proteins

Identifiers

PMID27782114

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.