Document Detail

Resistance and aerobic exercise: The influence of mode on the relationship between IL-6 and glucose tolerance in obese young men.
MedLine Citation:
PMID:  21487312     Owner:  NLM     Status:  Publisher    
ABSTRACT: Mitchell, JB, Phillips, MD, Yellott, RC, and Currie, LM. Resistance and aerobic exercise: The influence of mode on the relationship between IL-6 and glucose tolerance in obese young men. J Strength Cond Res 25(X): 000-000, 2011-Regular exercise lowers indicators of disease risk including some inflammatory cytokines; however, the relationship between different modes of acute exercise, cytokine levels, and subsequent glucose tolerance is unclear. The purpose was to determine the effects of resistance (RES) and aerobic (AER) exercises on interleukin-6 (IL-6) and its association with glucose tolerance 24 hours after exercise. After testing for 1 repetition maximum (1RM) and &OV0312;O2peak, 10 obese (body mass index > 30 kg·m), untrained men aged 18-26 years completed 3 protocols: 60 minutes of RES, AER, and a resting (CON) condition. The RES was 2 sets of 8 repetitions and a third set to fatigue at 80% 1RM of 8 lifts using all major muscle groups. The AER was 60 minutes of cycling at 70% of &OV0312;O2peak. On day 1, subjects completed the 60-minute exercise or resting protocol, and on day 2, they completed an oral glucose tolerance test (OGTT). Blood was collected before and after exercise, at 2 and 7 hour postexercise, and before and every 30 minutes during the OGTT and was analyzed for IL-6, glucose and insulin. Postexercise IL-6 was greater in RES (8.01 ± 2.08 pg·mL) vs. in AER (4.26 ± 0.27 pg·mL), and both were greater than in CON (1.61 ± 0.18 pg·mL). During the OGTT, there were no differences in glucose or insulin between conditions for single time points or as area under the curve. The RES caused greater IL-6 levels immediately after exercise that may be related to the greater active muscle mass compared to AER. Neither exercise produced enhanced glucose removal compared to control; thus, despite the greater elevation in IL-6 in RES, for these exercise conditions and this population, this cytokine did not influence glucose tolerance.
Joel B Mitchell; Melody D Phillips; Robert C Yellott; Lauren M Currie
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-4-09
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  -     ISSN:  1533-4287     ISO Abbreviation:  -     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-4-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Exercise Physiology Laboratory, Texas Christian University, Fort Worth, Texas.
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