Evidence map›Paper›PMID 27243823›Full record

ArticlePloS one2016

Effect of Chronic Athletic Activity on Brown Fat in Young Women.

Vibha Singhal, Giovana D Maffazioli, Kate E Ackerman, Hang Lee, Elisa F Elia, Ryan Woolley, Gerald Kolodny, Aaron M Cypess, Madhusmita Misra

Erratum issuedAbstract read
In one paragraph

Article in PloS one, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 30 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing 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

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

  1. Pooled it
  2. Trial
  3. The Effects of 10-Week Strength Training in the Winter on Brown-like Adipose Tissue Vascular Density.International journal of environmental research and public health · 2022
    Trial
  4. Trial
  5. Review
  6. Article
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  11. Weighing in on the role of brown adipose tissue for treatment of obesity.Journal of pharmacy & pharmaceutical sciences : a publication of the Canadian Society for Pharmaceutical Sciences, Societe canadienne des sciences pharmaceutiques · 2024
    Review
  12. Article
  13. Review
  14. Review
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  17. An update on brown adipose tissue biology: a discussion of recent findings.American journal of physiology. Endocrinology and metabolism · 2021
    Review
  18. Review
  19. Vigorous-Intensity Physical Activities Are Associated with High Brown Adipose Tissue Density in Humans.International journal of environmental research and public health · 2020
    Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors.

Vibha SinghalPediatric Endocrine Unit, Massachusetts General Hospital and Harvard Medical School Boston, Massachusetts, United States of America.
Giovana D MaffazioliNeuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, United States of America.
Kate E AckermanNeuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, United States of America.
Hang LeeDepartment of Biostatistics, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, United States of America.
Elisa F EliaDivision of Nuclear Medicine and Molecular Imaging, Department of Radiology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, United States of America.
Ryan WoolleyNeuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, United States of America.
Gerald KolodnyDivision of Nuclear Medicine and Molecular Imaging, Department of Radiology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, United States of America.
Aaron M CypessDiabetes, Endocrinology, and Obesity Branch, NIDDK, NIH, Bethesda, Maryland, United States of America.
Madhusmita MisraPediatric Endocrine Unit, Massachusetts General Hospital and Harvard Medical School Boston, Massachusetts, United States of America.

Funding

Harvard Clinical and Translational Science CenterUL1TR001102 · NCATS · HARVARD MEDICAL SCHOOL · PI NADLER, LEE MARSHALL · 2013 to 2017
$106.2M
HARVARD CLINICAL AND TRANSLATIONAL SCIENCE CENTER (UL1)UL1RR025758 · NCRR · HARVARD MEDICAL SCHOOL · PI NADLER, LEE MARSHALL · 2008 to 2011
$91.4M
ROLE OF DIETARY CONSTITUENTS ON GENE EXPRESSION IN INTESTINAL EPITHELIUMP30DK040561 · NIDDK · MASSACHUSETTS GENERAL HOSPITAL · PI Elizabeth Austen Lawson, Takara Leah Stanley · 1994 to 2026
$31.6M
Physiological Responses to Activation of Human Brown Adipose TissueZIADK075116 · NIDDK · NATIONAL INSTITUTE OF DIABETES AND DIGESTIVE AND KIDNEY DISEASES · PI CYPESS, AARON · 2015 to 2025
$6.1M
Fat Mediated Modulation of Reproductive and Endocrine Function in Young AthletesR01HD060827 · NICHD · MASSACHUSETTS GENERAL HOSPITAL · PI MISRA, MADHUSMITA · 2009 to 2013
$2.4M
Bone Metabolism and Body Composition in Young AthletesK24HD071843 · NICHD · MASSACHUSETTS GENERAL HOSPITAL · PI MISRA, MADHUSMITA · 2013 to 2017
$930k
NCATS NIH HHS UL1 TR001102NCRR NIH HHS UL1 RR025758NICHD NIH HHS K24 HD071843NICHD NIH HHS R01 HD060827NIDDK NIH HHS P30 DK040561
6 · The paper itself

Abstract

backgroundThe effect of chronic exercise activity on brown adipose tissue (BAT) is not clear, with some studies showing positive and others showing negative associations. Chronic exercise is associated with increased resting energy expenditure (REE) secondary to increased lean mass and a probable increase in BAT. Many athletes are in a state of relative energy deficit suggested by lower fat mass and hypothalamic amenorrhea. States of severe energy deficit such as anorexia nervosa are associated with reduced BAT. There are no data regarding the impact of chronic exercise activity on BAT volume or activity in young women and it is unclear whether relative energy deficiency modifies the effects of exercise on BAT. PURPOSE: We assessed cold induced BAT volume and activity in young female athletes compared with non-athletes, and further evaluated associations of BAT with measures of REE, body composition and menstrual status.

methodsThe protocol was approved by our Institutional Review Board. Written informed consent was obtained from all participants prior to study initiation. This was a cross-sectional study of 24 women (16 athletes and8 non-athletes) between 18-25 years of age. Athletes were either oligo-amenorrheic (n = 8) or eumenorrheic (n = 8).We used PET/CT scans to determine cold induced BAT activity, VMAX Encore 29 metabolic cart to obtain measures of REE, and DXA for body composition.

resultsAthletes and non-athletes did not differ for age or BMI. Compared with non-athletes, athletes had lower percent body fat (p = 0.002), higher percent lean mass (p = 0.01) and trended higher in REE (p = 0.09). BAT volume and activity in athletes trended lower than in non-athletes (p = 0.06; p = 0.07, respectively). We found negative associations of BAT activity with duration of amenorrhea (r = -0.46, p = 0.02).BAT volume correlated inversely with lean mass (r = -0.46, p = 0.02), and positively with percent body fat, irisin and thyroid hormones.

conclusionsOur study shows a trend for lower BAT in young female athletes compared with non-athletes, and shows associations of brown fat with menstrual status and body composition. Brown fat may undergo adaptive reductions with increasing energy deficit.

Indexed as

Absorptiometry, PhotonAdipose Tissue, BrownAdolescentAdultAmenorrheaAthletesBasal MetabolismBody CompositionCross-Sectional StudiesFemaleHumansPositron Emission Tomography Computed TomographySportsYoung Adult

Identifiers

PMID27243823
PMCPMC4886995

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Registered trials

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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.