Back to Search
Start Over
Long-Range Correlations and Complex Regulation of Pacing in Long-Distance Road Racing.
- Source :
- International Journal of Sports Physiology & Performance; May2014, Vol. 9 Issue 3, p544-553, 10p
- Publication Year :
- 2014
-
Abstract
- Purpose: To analyze time-domain, spectral, and fractal properties of speed regulation during half-marathon racing. Methods: In 21 male experienced runners, high-resolution data on speed (V), stride frequency (SF), and stride length (SL) were assessed during half-marathon competition (21,098 m). Performance times, time-and frequency-domain variability, spectral-scaling exponent (beta), and fractal dimension (FD) of V, SF, and SL were analyzed. Results: V of 3.65 ± 0.41 m/s, SF of 1.41 ± 0.05 Hz, and SL of 2.58 ± 0.25 m occurred with higher (P < .05) individual variability in V and SL than in SF. Beta and FD were always 1.04-1.88 and 1.56-1.99, respectively. Beta and FD differed (P < .05) in SF and SL compared with V and were correlated in V and SL (r = .91, P < .05). Spectral peaks of V, SF, and SL occurred at wavelengths of 3-35 min, and those of V and SL were interrelated (r = .56, P < .05). Mean SF and mean SL were significantly correlated with performance (r = .59 and r = .95, P < .05). SL accounted for 84% ± 6% and SF for 16% ± 6% of speed variability. Conclusions: The observed nonrandom fluctuations in V, SF, and SL correspond to nonstationary fractional Brownian motion with inherent long-range correlations. This indicates a similar complex regulation process in experienced runners that is primarily mediated via SL. [ABSTRACT FROM AUTHOR]
- Subjects :
- ANALYSIS of variance
ANTHROPOMETRY
ATHLETIC ability
COMPARATIVE studies
EXERCISE physiology
NATURE
REGRESSION analysis
SPORTS sciences
STATISTICAL hypothesis testing
STATISTICS
T-test (Statistics)
TIME series analysis
DATA analysis
SPORTS events
BODY mass index
INTER-observer reliability
REPEATED measures design
LONG-distance running
EXERCISE intensity
DATA analysis software
DESCRIPTIVE statistics
Subjects
Details
- Language :
- English
- ISSN :
- 15550265
- Volume :
- 9
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- International Journal of Sports Physiology & Performance
- Publication Type :
- Academic Journal
- Accession number :
- 95702547
- Full Text :
- https://doi.org/10.1123/IJSPP.2012-0334