The recovery of repeated-sprint exercise is associated with PCr resynthesis, while muscle pH and EMG amplitude remain depressed

The physiological equivalents of power output maintenance and recovery during repeated-sprint exercise (RSE) remain to be fully elucidated. In an attempt to improve our understanding of the determinants of RSE performance we therefore aimed to determine its recovery following exhaustive exercise (wh...

Full description

Saved in:
Bibliographic Details
Published in:PloS one 2012-12, Vol.7 (12), p.e51977-e51977
Main Authors: Mendez-Villanueva, Alberto, Edge, Johann, Suriano, Rob, Hamer, Peter, Bishop, David
Format: Article
Language:English
Subjects:
Adenosine triphosphate
ATP
ATP (Adenosine triphosphate)
Biology
Electromyography
Exercise
Fatigue
Humans
Hydrogen ions
Hydrogen-Ion Concentration
Laboratories
Male
Medicine
Metabolism
Metabolites
Metabolome
Metabolomics
Muscle fatigue
Muscle proteins
Muscle, Skeletal - physiology
Muscles
pH
pH effects
Phosphocreatine
Phosphocreatine - biosynthesis
Physical fitness
Physiological aspects
Recovery
Recovery (Medical)
Science
Time Factors
Unit activity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The physiological equivalents of power output maintenance and recovery during repeated-sprint exercise (RSE) remain to be fully elucidated. In an attempt to improve our understanding of the determinants of RSE performance we therefore aimed to determine its recovery following exhaustive exercise (which affected intramuscular and neural factors) concomitantly with those of intramuscular concentrations of adenosine triphosphate [ATP], phosphocreatine [PCr] and pH values and electromyography (EMG) activity (a proxy for net motor unit activity) changes. Eight young men performed 10, 6-s all-out sprints on a cycle ergometer, interspersed with 30 s of recovery, followed, after 6 min of passive recovery, by five 6-s sprints, again interspersed by 30 s of passive recovery. Biopsies of the vastus lateralis were obtained at rest, immediately after the first 10 sprints and after 6 min of recovery. EMG activity of the vastus lateralis was obtained from surface electrodes throughout exercise. Total work (TW), [ATP], [PCr], pH and EMG amplitude decreased significantly throughout the first ten sprints (P
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0051977