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Energy Systems Contribution in the Running-based Anaerobic Sprint Test.

F Milioni1, A M Zagatto1, R A Barbieri1

  • 1UNESP - Univ Estadual Paulista, Department of Physical Education, Post Graduate Program in Movement Science, Rio Claro, São Paulo, Brazil.

International Journal of Sports Medicine
|February 14, 2017
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Summary
This summary is machine-generated.

This study investigated energy system contributions during repeated sprints. The phosphagen pathway fuels power, while oxidative and glycolytic pathways impact sprint performance and recovery.

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Area of Science:

  • Exercise Physiology
  • Sports Science
  • Human Performance

Background:

  • Understanding energy system contributions is crucial for optimizing training.
  • Repeated sprint ability (RSA) performance is influenced by both aerobic and anaerobic energy pathways.
  • Short recovery times in RSA place significant demands on metabolic systems.

Purpose of the Study:

  • To determine the contributions of different energy systems during repeated sprints with short recovery.
  • To associate repeated sprint performance (time and power) with energetic contributions and physiological variables.
  • To elucidate the role of the oxidative, glycolytic, and phosphagen pathways in repeated sprint performance.

Main Methods:

  • 13 healthy males completed the running-based anaerobic sprint test (RAST).
  • Incremental exercise protocol was used to determine lactate minimum intensity.
  • Net energy system contributions were estimated via oxygen consumption and blood lactate responses during RAST.

Main Results:

  • Relative energy system contributions were: oxidative phosphorylation (38%), glycolytic (34%), and phosphagen (28%).
  • Oxidative pathway contribution increased from the third sprint, coinciding with performance decrements.
  • Phosphagen pathway correlated with power performance (peak, mean, minimum power, force impulse).
  • Time performance correlated with oxidative and glycolytic pathways.
  • Oxidative pathway linked to improved inter-sprint recovery; glycolytic pathway linked to decreased sprint performance.

Conclusions:

  • The phosphagen system is vital for immediate power output during sprints.
  • The oxidative system aids recovery between sprints, while sustained glycolytic activity may impair performance.
  • Energy system interplay is critical for repeated sprint ability and performance outcomes.