TY - JOUR
T1 - Effect of adiposity on insulin action after acute and chronic resistance exercise in non-diabetic women
AU - Malin, Steven K.
AU - Hinnerichs, Kristi R.
AU - Echtenkamp, Brandon G.
AU - Evetovich, Tammy K.
AU - Engebretsen, Barbara J.
N1 - Funding Information:
Acknowledgments BJE conceptualized the study, and SKM, KRH, BGE, and TKE contributed to study design. All authors shared aspects of data collection, analysis, and interpretation. SKM, KRH and TKE share responsibility for statistical integrity. SKM and KRH wrote the manuscript and remaining authors provided edits. We thank Dr. Donovan Conley from Wayne State and Dr. Barry Braun from the University of Massachusetts for their advice on study design, as well as Shana Erwin and the Wayne Mercy Medical Center Lab Staff for clinical testing. We also thank Summer Cord and Kevin Negaard at the Center for Neurosciences, Orthopaedics & Spine for DXA assistance. We lastly thank all subjects for their efforts. This study was funded by the Wayne State College Foundation.
PY - 2013/12
Y1 - 2013/12
N2 - Purpose: Obesity may attenuate metabolic health improvements following lifestyle interventions. However, the effect of adiposity on insulin action following resistance exercise in young non-diabetic women is unknown. The purpose of this study was to test the hypothesis that adiposity attenuates improvements in insulin sensitivity and glucose-stimulated insulin secretion (INS0-60/GLC0-60) after both acute resistance exercise (ARE) and progressive training (PRT). Methods: Twenty-six young non-diabetic women (21.2 ± 0.7 years) were randomly assigned to control (C; n = 7; BF 40.1 ± 2.1 %) or exercise groups: normal body fat (NBF; n = 8; BF 29.9 ± 2.3 %) and high body fat (HBF; n = 12; BF 48.2 ± 1.4 %). Acute whole-body exercises were performed at 60 % of 1-RM for three sets of 8-12 repetitions, and PRT was performed 3 days/week for 7 weeks. A 75 g OGTT was conducted before and after ARE and PRT to estimate insulin sensitivity (Matsuda index) and INS0-60/GLC0-60. Insulin area under the curve (AUC) was calculated using the trapezoidal model. Results: ARE had no statistical effect on insulin action across groups. Strength and fat-free mass (via DXA) increased after PRT in both NBF and HBF (p < 0.05), but only HBF women decreased BF (p < 0.01). HBF women were less insulin sensitive at baseline compared to NBF women (p < 0.05). Insulin sensitivity increased 95 % and INS0-60/GLC0-60 decreased 32 % following PRT in NBF, but not HBF or C (p < 0.05). After training, enhanced insulin sensitivity was inversely related to decreased INS0-60/GLC0-60 (r = -0.71, p < 0.001), fasting insulin (r = -0.71, p < 0.001), and insulin AUC (r = -0.85, p < 0.001). Conclusion: Seven weeks of PRT increases insulin sensitivity and reduces glucose-stimulated insulin secretion in NBF, but not HBF women. Obesity attenuates exercise-induced improvements in glucose regulation in young non-diabetic women.
AB - Purpose: Obesity may attenuate metabolic health improvements following lifestyle interventions. However, the effect of adiposity on insulin action following resistance exercise in young non-diabetic women is unknown. The purpose of this study was to test the hypothesis that adiposity attenuates improvements in insulin sensitivity and glucose-stimulated insulin secretion (INS0-60/GLC0-60) after both acute resistance exercise (ARE) and progressive training (PRT). Methods: Twenty-six young non-diabetic women (21.2 ± 0.7 years) were randomly assigned to control (C; n = 7; BF 40.1 ± 2.1 %) or exercise groups: normal body fat (NBF; n = 8; BF 29.9 ± 2.3 %) and high body fat (HBF; n = 12; BF 48.2 ± 1.4 %). Acute whole-body exercises were performed at 60 % of 1-RM for three sets of 8-12 repetitions, and PRT was performed 3 days/week for 7 weeks. A 75 g OGTT was conducted before and after ARE and PRT to estimate insulin sensitivity (Matsuda index) and INS0-60/GLC0-60. Insulin area under the curve (AUC) was calculated using the trapezoidal model. Results: ARE had no statistical effect on insulin action across groups. Strength and fat-free mass (via DXA) increased after PRT in both NBF and HBF (p < 0.05), but only HBF women decreased BF (p < 0.01). HBF women were less insulin sensitive at baseline compared to NBF women (p < 0.05). Insulin sensitivity increased 95 % and INS0-60/GLC0-60 decreased 32 % following PRT in NBF, but not HBF or C (p < 0.05). After training, enhanced insulin sensitivity was inversely related to decreased INS0-60/GLC0-60 (r = -0.71, p < 0.001), fasting insulin (r = -0.71, p < 0.001), and insulin AUC (r = -0.85, p < 0.001). Conclusion: Seven weeks of PRT increases insulin sensitivity and reduces glucose-stimulated insulin secretion in NBF, but not HBF women. Obesity attenuates exercise-induced improvements in glucose regulation in young non-diabetic women.
KW - Diabetes
KW - Glycemic control
KW - Insulin resistance
KW - Metabolic syndrome
KW - Weight lifting
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U2 - 10.1007/s00421-013-2725-5
DO - 10.1007/s00421-013-2725-5
M3 - Article
C2 - 24072034
AN - SCOPUS:84890284229
SN - 1439-6319
VL - 113
SP - 2933
EP - 2941
JO - European Journal of Applied Physiology
JF - European Journal of Applied Physiology
IS - 12
ER -