Acute effects of a 60‑min time trial on power‑related parameters in trained endurance runners
Metadata
Show full item recordEditorial
BMC
Materia
Fatigue Athletic performance Technology assessment Running
Date
2022-07-24Referencia bibliográfica
Cartón-Llorente, A... [et al.]. Acute effects of a 60-min time trial on power-related parameters in trained endurance runners. BMC Sports Sci Med Rehabil 14, 142 (2022). [https://doi.org/10.1186/s13102-022-00538-7]
Abstract
Background: The advent of power meters for running has raised the interest of athletes and coaches in new ways of
assessing changes in running performance. The aim of this study is to determine the changes in power-related variables
during and after a strenuous endurance running time trial.
Methods: Twenty-one healthy male endurance runners, with a personal record of 37.2 ± 1.2 min in a 10-km race,
completed a 1-h run on a motorized treadmill trying to cover as much distance as they could. Before and after the
time trial the athletes were asked to perform a 3-min run at 12 km h−
1. Normalized mean power output, step frequency,
form power and running effectiveness were calculated using the Stryd™ power meter. Heart rate (HR) and
rating of perceived exertion (RPE) were monitored, and data averaged every 5 min.
Results: Despite high levels of exhaustion were reached during the time trial (HRpeak = 176.5 ± 9.8 bpm;
RPE = 19.2 ± 0.8), the repeated measures ANOVA resulted in no significant differences (p ≥ 0.05), between each
pair of periods for any of the power-related variables. The pairwise comparison (T test) between the non-fatigued
and fatigued constant 3-min runs showed an increase in step frequency (p = 0.012) and a decrease in form power
(p < 0.001) under fatigue conditions, with no meaningful changes in normalized mean power output and running
effectiveness.
Conclusions: Trained athletes are able to maintain power output and running effectiveness during a high demanding
extended run. However, they preferred to reduce the intensity of vertical impacts under fatigue conditions by
increasing their step frequency.