Document Detail


Alterations in peripheral muscle contractile characteristics following high and low intensity bouts of exercise.
MedLine Citation:
PMID:  21556817     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The aim of this study was to monitor muscle contractile performance in vivo, using an electrical stimulation protocol, immediately following an acute high and low intensity exercise session conducted at the same average intensity performed on a cycle ergometer. Eighteen healthy males (25.1 ± 4.5 years, 81.6 ± 9.8 kg, 1.83 ± 0.06 m; mean ± SD) participated in the study. On two occasions, separated by 1 week, subjects completed a high and low intensity exercise session in a random order on a cycle ergometer, performing equal total work in each. At the end of each test, a muscle performance test using electrical stimulation was performed within 120 s. Post-exercise muscle data were compared to the subjects' rested muscle. We found a reduction in muscle contractile performance following both high and low intensity exercise protocols but a greater reduction in maximal voluntary contraction (MVC) (P < 0.01), rate of torque development (RTD) (P < 0.001), rate of relaxation (RR(½)), (P < 0.001) the 60 s slope of the fatigue protocol (P < 0.01) and torque frequency response (P < 0.05) following the high intensity bout. Importantly muscle performance remained reduced 1 h following high intensity exercise but was recovered following low intensity exercise. Muscle function was significantly reduced following higher intensity intermittent exercise in comparison to lower intensity exercise even when the average overall intensity was the same. This study is the first to demonstrate the sensitivity of muscle contractile characteristics to different exercise intensities and the impact of higher intensity bursts on muscle performance.
Authors:
Martyn G Morris; Helen Dawes; Ken Howells; Oona M Scott; Mary Cramp; Hooshang Izadi
Related Documents :
3084127 - Pharmacodynamics of tissue-type plasminogen activator characterized by computer-assiste...
20346367 - Physical activity under confinement and free-living conditions.
10218747 - Leisure-time physical activity and the risk of primary cardiac arrest.
9619887 - The association of soft-tissue rheumatism and hypermobility.
20532017 - Effects of aerobic exercise on abdominal fat, thigh muscle mass and muscle strength in ...
23720327 - Pulmonary gas exchange and acid-base balance during exercise.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-5-10
Journal Detail:
Title:  European journal of applied physiology     Volume:  -     ISSN:  1439-6327     ISO Abbreviation:  -     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-5-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Movement Science Group, Oxford Brookes University, Gipsy Lane Campus, Headington, Oxford, OX3 0BP, UK, mgmorris@brookes.ac.uk.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  South Pacific Islanders resist type 2 diabetes: comparison of aerobic and resistance training.
Next Document:  A computational study of multisensory maturation in the superior colliculus (SC).