Akutní změny v běžecké ekonomice po tréninkové jednotce plyometrického tréninku

Title in English Acute changes in running economy after a training session (plyometric method)


Year of publication 2014
Type Conference abstract
MU Faculty or unit

Faculty of Sports Studies

Description Performance and national level long distance runners (n = 7) were subjected to measurement baseline (pretest) running economy (RE) on a treadmill (Lode Katana, Netherlands) at speeds of 8, 10 and 12 km/h, each stage of the test protocol lasted five minutes, oxygen consumption was recorded last 2 minutes of each stage using the device Cortex (Metalyzer, Germany). The testing was performed under standard laboratory conditions (temperature 20 °C, relative humidity 40 %). The following day it was completed strength training (plyometric method), which contained 6 exercises focusing on the lower limbs. Burden on the exercise lasted seven seconds, followed by a two-minute rest. 3 sets of each exercise were performed. After power load immediately followed by RE test (posttest). Average values at speed 8 km/h were 29.96±1.49 ml/min.kg (pretest; mean±SD) resp. 29.67±1.45 ml/min.kg (posttest) at 10 km/h 35.53±2.22 respectively. 36.15±2.07 ml/min.kg at 12 km/h 42.14±2.34 respectively. 41.97 ± 2.90 ml/min.kg. Found significant (p < .05) differences RE (Wilcoxon signed-rank test) between pretest and posttest on any monitored speed (8 km/h, p = .53; 10 km/h, p = .18; 12 km/h, p = .87). 2 runners were observed positive changes (lower VO2) after application of strength training at all levels of the test protocol, one runner was negative changes and 3 runners responded mixed (some rate changes showed positive character). Relative changes (pretest and posttest ratio) was 99.1% (8 km/h) 100.02% (10 km/h) respectively. 99.59 % (12 km/h). Individual relative changes were in the interval from 94.2 to 105.84 % at 8 km/h, from 96.43 to 106.34 % (10 km/h) and from 91.52 to 103.81% (12 km/h). The above results suggest that acute changes induced by RE strength training (plyometric method) stayers are not clear, statistically insignificant and debatable.
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