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Impact of Aerobic Capacity on Mechanical Variables in Track Sprinters and Middle-Distance Runners: A Comparative
Nikolaos P Belechris1, Gregory C Bogdanis1, Elias Zacharogiannis1
1School of Physical Education and Sports Science, National and Kapodistrian University of Athens, 17237 Athens, Greece.
Aerobic capacity, particularly speed at maximal oxygen uptake (vVO2max), is crucial for repeated sprint performance. Higher vVO2max enhances fatigue resistance more than anaerobic variables in sprinters and middle-distance runners.
Area of Science:
- Exercise Physiology
- Sports Science
- Biomechanics
Background:
- National-level sprinters (SPRs) and middle-distance runners (MDRs) differ in physiological characteristics.
- Aerobic capacity (VO2max) is typically higher in MDRs, while anaerobic capabilities are emphasized in SPRs.
Purpose of the Study:
- To investigate the influence of aerobic capacity on force-velocity (F-v) characteristics and repeated-sprint (RS) performance.
- To identify key physiological determinants of fatigue resistance during RS.
Main Methods:
- Assessed aerobic capacity (VO2max) and mechanical F-v profiling in elite male SPRs and MDRs.
- Administered a 10 x 60m RS test with 30s recovery between sprints.
- Utilized multiple linear regression to analyze predictors of fatigue resistance.
Main Results:
- MDRs showed significantly higher VO2max and speed at VO2max (vVO2max).
- SPRs exhibited greater anaerobic speed reserve (ASR), maximal force (F0), and peak power (Pmax), but experienced greater performance decrements and fatigue during RS.
- vVO2max, not ASR, was identified as a significant predictor of fatigue resistance.
Conclusions:
- Aerobic capacity, specifically vVO2max, is a critical determinant of fatigue resistance during repeated sprints.
- vVO2max plays a more significant role in sustaining RS performance than mechanical variables like v0, F0, and Pmax.
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