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Sport Sciences for Health

, Volume 15, Issue 1, pp 99–107 | Cite as

Abdominal adiposity distribution in elite rugby union athletes using magnetic resonance imaging

  • Adam J. ZemskiEmail author
  • Shelley E. Keating
  • Elizabeth M. Broad
  • Damian J. Marsh
  • Gary J. Slater
Original Article
  • 49 Downloads

Abstract

Purpose

This study aimed to assess visceral adipose tissue (VAT), an established marker for cardiometabolic complications, in elite rugby union athletes, with specific consideration given to ethnicity. The ability of dual-energy X-ray absorptiometry (DXA) to estimate VAT in athletic populations compared to the criterion magnetic resonance imaging (MRI) was also explored.

Methods

Thirty elite male rugby union athletes (age 23.9 ± 4.0 years; stature 186.7 ± 7.0 cm; mass 101.9 ± 11.2 kg) underwent assessment via DXA for body composition, and MRI for abdominal adiposity, at the start of the pre-season training period. Participants were ascribed a specific ethnicity when three or more of their grandparents were of either Caucasian or Polynesian descent.

Results

MRI VAT did not differ between ethnicities (Caucasian 92.7 ± 26.7 cm2; Polynesian 86 ± 27.3 cm2; p = 0.52); however, there was a trend for forwards (96.7 ± 25.0 cm2) to have higher VAT than backs (81.7 ± 27.3 cm2; p = 0.13) which provides an area of interest for researchers. Thirty-seven percent of athletes (eight forwards, three backs) were found to have VAT > 100 cm2, a threshold for increased cardiometabolic risk within the general population. Bland–Altman analysis indicated that DXA VAT underestimated MRI VAT by ~ 25 cm2, with relatively wide limits of agreement (− 24.0 to 75.6 cm2).

Conclusions

Given the size of rugby union athletes, and the association between elevated VAT and cardiometabolic complications in “supersized” athletes from other sports, further investigation into VAT and other markers of cardiometabolic disease in rugby union populations is warranted. Further, DXA was found to underestimate VAT compared to the criterion MRI in this athletic population.

Keywords

Polynesian Caucasian Obesity VAT Body composition Ethnicity 

Abbreviations

ANOVA

Analysis of variance

BMI

Body mass index

CV

Coefficient of variation

DXA

Dual-energy X-ray absorptiometry

ICC

Interclass correlation coefficients

MRI

Magnetic resonance imaging

NHANES

National Health and Nutrition Examination Survey

NFL

National Football League, American (gridiron) football

ROI

Region of interest

SAT

Subcutaneous adipose tissue

SD

Standard deviation

VAT

Visceral adipose tissue

VAT:SAT

Visceral adipose tissue to subcutaneous adipose tissue ratio

Notes

Funding

SEK has received project-specific funding from Exercise and Sports Science Australia and Diabetes Australia Research Program for unrelated work. SEK is supported by the National Health and Medical Research Council (NHMRC) of Australia via an Early Career Research Fellowship (122190).

Compliance with ethical standards

Conflict of interest

All authors declare that they have no conflict of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

Informed consent

All participants gave written informed consent before participating in the study. All participants provided informed consent to partake in the study, and the protocols for testing on human subjects were submitted to, and approved by, the Human Ethics Committee of the University of the Sunshine Coast (EC00297, S/12/424).

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Copyright information

© Springer-Verlag Italia S.r.l., part of Springer Nature 2018

Authors and Affiliations

  • Adam J. Zemski
    • 1
    Email author
  • Shelley E. Keating
    • 2
  • Elizabeth M. Broad
    • 3
  • Damian J. Marsh
    • 4
  • Gary J. Slater
    • 1
  1. 1.School of Health and Sport SciencesUniversity of the Sunshine CoastMaroochydoreAustralia
  2. 2.School of Human Movement and Nutrition SciencesThe University of QueenslandSt LuciaAustralia
  3. 3.US Paralympics, US Olympic CommitteeChula VistaUSA
  4. 4.Fiji Rugby UnionSuvaFiji

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