Resumen de Effects of High Intensity / Low Volume and Low Intensity / High Volume Isokinetic Resistance Exercise on Postexercise Glucose Tolerance
Andrew D. Miller, Brent C. Ruby, James J. Laskin, Steven E. Gaskill
Miller, A.D., B.C. Ruby, J.J. Laskin, and S.E. Gaskill. Effects of high intensity/low volume and low intensity/high volume isokinetic resistance exercise on postexercise glucose tolerance. J. Strength Cond. Res. 21(2):330-335. 2007.-The purpose of this study was to determine the effects of high intensity/ low volume (HILV) and low intensity/high volume (LIHV) isokinetic resistance exercise on postexercise glucose tolerance. Subjects (n = 10) participated in a counterbalanced, randomized design of 2 separate isokinetic resistance exercise trials (HILV and LIHV) of reciprocal concentric knee flexion and knee extension in a fasted state. Each bout was followed by a 45-minute oral glucose tolerance test (OGTT; 1.8 g·kg fat free mass?1). Blood samples were obtained every 15 minutes to determine glucose and insulin concentrations. There was no difference in total work between the 2 trials (p = 0.229). Blood glucose was significantly higher at all time points compared with time 0 following the LIHV trial (p < 0.05). Following the HILV trial, blood glucose was significantly elevated at 15 and 30 minutes (p < 0.05), but returned to resting values by 45 minutes. Insulin concentration was significantly elevated following both trials at all time points (p < 0.05). Blood glucose and insulin were significantly higher following the LIHV at 30 and 45 minutes compared with the HILV trial (p < 0.05). These results demonstrate that although the total work output was similar across trials, high intensity muscle contraction is associated with an enhanced normalization of glucose homeostasis following a large postexercise oral glucose feed.
