Biology of Sport
pISSN 0860-021X    eISSN 2083-1862
Archival Issues
Volume 34, 2017
Volume 33, 2016
Volume 32, 2015
Volume 31, 2014
Volume 30, 2013
Volume 29, 2012
Volume 28, 2011
Volume 27, 2010
Volume 26, 2009
Volume 25, 2008
Volume 24, 2007
Volume 23, 2006
Volume 22, 2005
Volume 21, 2004
Volume 20, 2003
Archival Issues 1984-1998
Search
Newsletter
Information for Authors
Special Information
 » 
Journal Abstract
 
Differences in neuromuscular fatigue after aerobic and anaerobic running loads
B Škof, V Strojnik
Biol Sport 2008; 25(4):307-320
ICID: 890263
Article type: Original article
IC™ Value: 9.57
Abstract provided by Publisher
 
The aim of the research was to establish some characteristics and differences in neuromuscular fatigue after different running loads. Seven well-trained runners performed two running tasks: an interval run of 5 x 300 m at sub-maximum speed with a one-min rest (100 m jogging) between individual runs, and a continuous 6-km run at the anaerobic threshold speed (criterion VOBLA). To measure the contractile characteristics of the femuris muscle quadriceps before and after a running load the following electrical stimulation (ES) tests were used: single twitch, low - and high-frequency stimulation, the maximum voluntary knee extension test and the muscle activation level test. The anaerobic interval runs caused a greater decline in maximum torque twitch (p<0.05) and a greater decline in maximum muscular relaxation rate (p<0.05) compared to the longer continuous run. The anaerobic interval load reduced muscle contraction at both low and high frequencies of ES, while the aerobic continuous run led to a lowering of muscle contraction force but only at low frequencies of stimulation. After both charges the decrease in ES-evoked muscle contraction was bigger than the decrease in torque at MVC. Both running loads caused peripheral fatigue. The lowering of muscular contractile ability after both loads was mainly the consequence of disturbance in the Ca transport system mechanism, while after the intensive interval runs this was also a result of disturbance in the spreading action potential across the sarcomere.

ICID 890263
 
FULL TEXT 274 KB


Related articles
  • in IndexCopernicus™
         electrical stimulation [14 related records]
         Continuous aerobic running [0 related records]
         Anaerobic interval running [0 related records]
         Fatigue [108 related records]


  •  

    Copyright © Biology of Sport  2017
    Page created by Index Copernicus Ltd. All Rights reserved.