Resumen de Changes in Power Assessed by the Wingate Anaerobic Test Following Downhill Running
Carmel Nottle, Kanuzori Nosaka
Nottle, C., and K. Nosaka. Changes in power assessed by the Wingate Anaerobic Test following downhill running. J. Strength Cond. Res. 21(1):145-150. 2007.-Few studies have examined the effects of eccentric exercise-induced muscle damage on power despite power being a key performance variable in a number of sporting events. The aim of this study was to examine changes in anaerobic power (30-second Wingate Test), isometric strength of the knee extensors and flexors, muscle soreness, and plasma creatine kinase (CK) activity following downhill running. Eight men performed a 40-minute downhill (?7%) run on a treadmill, and measurements were taken on 6 occasions (2 baseline and 0.5, 24, 72, and 120 hours postrun). A second group of men (n = 5) had the measurements taken on 6 occasions without downhill running and served as a control group. A repeated measures analysis of variance revealed no significant changes in any measures across time for the control group. Following downhill running, significant (p < 0.05) decreases in strength (0.5-24 hours), and significant increases in muscle soreness (0.5-72 hours) and plasma CK activity (0.5-120 hours) were observed. A significant decrease in peak and average power ( 5%) was evident only 0.5 hours postrun, and the decrease was smaller in magnitude than that of strength ( 15%). These results suggest that power is less affected than strength after eccentric exercise, and the effect of reduced power on sport performance seems negligible.
