17^th World Fitness Expo

Biography

Biography: H George Philippi

Abstract

Limited research has looked into the acute effects of exercise on insulin/glucose metabolism by comparing machine weight and elastic band resistance exercises. The purpose of this study was to compare two forms of resistance exercise, machine weight versus elastic band exercise, for effects on glucose and insulin responses in postmenopausal women. Ten healthy, normoglycemic (fasting glucose: 85.6±5.3 mg/dL), sedentary postmenopausal women completed the study (57±8.3 years). Each participant performed three trials, one using machine weight exercises, one using elastic band exercises and a rest trial. The resistance exercise trials were conducted in circuit fashion for three sets, and were comprised of 10 total exercises. Eight of ten exercises were with resistance for upper and lower body, while the remaining two exercises were unloaded core exercises. Each exercise set consisted of 12-15 repetitions. Dietary intake was recorded for three days prior to each trial and analyzed. After an overnight fast, an oral glucose challenge was performed 18–24 hours after the two exercise and one rest trials. No main-effect for trial (MWRE, ELBRE, Rest) were observed on insulin, C-peptide or glucose compared to rest (p>0.05); no main effect differences between insulin, C-peptide and glucose area under the curve (p>0.05).; no main effect difference for trial on the Cederholm insulin sensitivity index (p>0.05); and no main effect for trial by 3-day or 1-day macronutrient intake (all p>0.05). Resistance exercises utilizing both machine weight and elastic band had comparable (no) effect on insulin, Cpeptide and glucose metabolism after an acute bout for these particular healthy, sedentary, postmenopausal women. The practical application for elastic band resistance exercises, from this study, are questionable compared to more traditional resistance exercises for possibly altering insulin, C-peptide and glucose responses.