Document Detail

Acute effects of muscle fatigue and recovery on force production and relaxation in endurance, power and strength athletes.
MedLine Citation:
PMID:  2195236     Owner:  NLM     Status:  MEDLINE    
Acute effects of fatigue produced by a maintained 60% isometric loading on force production and relaxation characteristics of the leg extensor muscles were studied in male endurance (n = 9), power (n = 6) and strength athletes (n = 9). The initial non-fatigued isometric force-time curves differed considerably (p less than 0.05-0.001) between the groups so that the times of force production were the shortest and correspondingly the maximal rate of force production the greatest in the power athletes but the longest and the smallest in the endurance athletes. The endurance time of 70.7 +/- 32.9 s at the 60% fatiguing loading was in the endurance athletes longer (p less than 0.01) than in the power (30.6 +/- 7.1 s) and strength groups (31.7 +/- 5.5 s). The present fatiguing loading resulted in all athlete groups in significant (p less than 0.05-0.001) worsening in maximal force, in the times of force production and in the maximal rates of force production and relaxation. However, this worsening in the endurance athletes in maximal force (to 92.9 +/- 7.1%) as well as in the maximal rates of force production (to 79.2 +/- 20.8%) and relaxation (to 73.1 +/- 29.2%) were significantly (p less than 0.05-0.01) smaller than the corresponding decreases in the power athletes (to 64.3 +/- 8.0%, 74.8 +/- 7.4% and to 40.9 +/- 12%, respectively) and in the strength athletes (to 65.7 +/- 7.0%, 56.7 +/- 16.0% and to 34.8 +/- 6.7%, respectively).(ABSTRACT TRUNCATED AT 250 WORDS)
K Häkkinen; E Myllylä
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  The Journal of sports medicine and physical fitness     Volume:  30     ISSN:  0022-4707     ISO Abbreviation:  J Sports Med Phys Fitness     Publication Date:  1990 Mar 
Date Detail:
Created Date:  1990-08-13     Completed Date:  1990-08-13     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0376337     Medline TA:  J Sports Med Phys Fitness     Country:  ITALY    
Other Details:
Languages:  eng     Pagination:  5-12     Citation Subset:  IM; S    
Department of Biology of Physical Activity University of Jyväskylä, Finland.
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MeSH Terms
Isometric Contraction / physiology*
Leg / physiology*
Muscle Contraction / physiology*
Muscle Relaxation / physiology
Muscles / physiology*
Physical Endurance / physiology*
Physical Exertion / physiology

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