European Journal of Applied Physiology

, Volume 112, Issue 11, pp 3787–3795

The acute effects of aerobic exercise and modified rugby on inflammation and glucose homeostasis within Indigenous Australians

Original Article

DOI: 10.1007/s00421-012-2361-5

Cite this article as:
Mendham, A.E., Coutts, A.J. & Duffield, R. Eur J Appl Physiol (2012) 112: 3787. doi:10.1007/s00421-012-2361-5

Abstract

This study investigated the acute effects of two exercise modes, including cycle ergometry and modified rugby on inflammation and glucose regulation within an Indigenous Australian population. Ten sedentary, untrained Indigenous male participants volunteered to participate and were not clinically diagnosed with cardiovascular or metabolic disorders. Following baseline testing and in a randomized cross-over design participants completed two exercise protocols (cycle ergometry and modified rugby) of 40-min duration separated by 7 days’ recovery. Fasting venous blood was collected pre, post, 30, 60 and 240 min post exercise for analysis of glucose, insulin, cortisol and inflammatory markers of tumour necrosis factor (TNF)-α, interleukin (IL)-1β, IL-6, IL-1 receptor agonist (ra) and C-reactive protein (CRP). IL-6 and IL-1ra were significantly (P < 0.05) increased within the 240 min post-exercise period, without significant differences between protocols (P > 0.05). There were no significant changes within or between protocols for TNF-α, IL-1β and CRP (P > 0.05). A comparison of insulin resistance: homeostasis model (HOMA) between resting and 240 min post exercise shows a change from a baseline value of 4.44 (3.71) to 1.76 (1.67) HOMA in cycle ergometry (P < 0.05) and to 1.54 (1.33) HOMA in modified rugby (P < 0.05), without differences between sessions (P > 0.05). This study identified similar acute inflammatory and glucose regulatory responses between cycle ergometry and modified rugby. Prescribing modified rugby as a mode of physical activity may provide Indigenous populations with a community-based approach to promote increased engagement in physical activity and assist in the acute regulation of glucose disposal and inflammatory cytokines.

Keywords

Aboriginal AustraliansSedentaryCyclingIntervalSmall-sided games

Abbreviations

CVD

Cardiovascular disease

CRP

C-reactive protein

GPS

Global positioning satellite

GXT

Graded exercise test

HR

Heart rate

HOMA

Insulin resistance: homeostasis model

IL

Interleukin

MHR

Maximum heart rate

VO2

Oxygen consumption

Ra

Receptor agonist

TB-FM

Total body fat mass

TNF-α

Tumor necrosis factor alpha

T2DM

Type 2 diabetes mellitus

Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Amy E. Mendham
    • 1
  • Aaron J. Coutts
    • 2
  • Rob Duffield
    • 1
  1. 1.School of Human Movement StudiesCharles Sturt UniversityBathurstAustralia
  2. 2.Sport and Exercise Discipline GroupUTS: Health, University of Technology Sydney (UTS)SydneyAustralia