Akutní změny v běžecké ekonomice po tréninkové jednotce plyometrického tréninku

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

KALINA Tomáš CACEK Jan

Year of publication 2014
Type Conference abstract
MU Faculty or unit

Faculty of Sports Studies

Citation
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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