Int J Sports Med 1996; 17(1): 12-16
DOI: 10.1055/s-2007-972801
Physiology and Biochemistry

© Georg Thieme Verlag Stuttgart · New York

Effects of Low-Volume Resistive Exercise on Beta-Endorphin and Cortisol Concentrations

R. R. Kraemer1 , E. O. Acevedo2 , D. Dzewaltowski3 , J. L. Kilgore4 , G. R. Kraemer5 , V. D. Castracane6
  • 1Southeastern Louisiana University, Exercise Physiology Laboratory, Department of Kinesiology and Health Studies, Hammond, LA 70402
  • 2University of New Orleans, Department of Human Performance and Health Promotion, New Orleans, LA 70148
  • 3Kansas State University, Department of Kinesiology, Manhattan, KS 66506 4 Texas Tech University Health Sciences Center, Department of Obstetrics and Gynecology, Amarillo, TX 79106
Weitere Informationen


09. März 2007 (online)

It has been recently suggested that high and sustained lactate levels may elicit increases in peripheral B-EN concentrations (16). We have observed elevated and sustained lactate concentrations in response to a low-volume resistive exercise protocol (14) that were similar to those from other exercise protocols that produced elevated beta-endorphin (B-EN) concentrations. Thus, the purpose of the study was to determine the effects of a low-volume (21,700 J) resistive exercise repetition maximum (RM) protocol using weight machines on peripheral lactate, B-EN and Cortisol concentrations. Subjects completed 3 sets of bench press, lat-pull, leg extension, and leg curl exercise at a 10-RM load. Blood samples were collected and rating of perceived exertion (RPE, 15-point Borg scale) was assessed before exercise (- 40 and - 10 min), after each exercise, and after the exercise session (+ 35 min); blood samples were collected at 7 additional post-exercise times. RPE increased significantly throughout the exercise. Lactate concentrations rose significantly to peak at 8.54 mM at LE. B-EN and Cortisol concentrations (- 10) of 4.63 ± 0.54 pmol · l-1 and 12.09 ± 1.44 μg · dl-1, respectively, were not significantly elevated over time. The data suggest that a low-volume resistive exercise protocol using weight machines elevates lactate concentrations without altering B-EN and Cortisol concentrations.