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THE EFFECT OF LACTATE CONCENTRATION ON THE HANDGRIP STRENGTH DURING JUDO BOUTS.
MedLine Citation:
PMID:  21986690     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Judo is a combat sport in which the athlete attempts to hold and control their adversary through gripping techniques (kumi-kata) to apply opportune throwing techniques (nage-waza). Twelve male judo athletes, representing national teams, were recruited to investigate changes in the maximal isometric strength in both hands before (pre-) and after (post-) four judo bouts, and its relationship with the maximal blood lactic acid concentration. The subjects performed a maximal isometric contraction with each hand immediately before and after each bout. A blood sample was taken at 1, 3 and 14 min after each bout and the lactic acid concentration was determined. An overall effect of the successive bouts on the maximal isometric handgrip strength of pre-bouts was observed for both hands (p<0.05) but not in that of post-bouts (p>0.05). The dominant hand showed an overall decrease in the maximal isometric strength due to the bout, with the decrease being significant for the first, third and fourth bouts (p<0.05). The non-dominant hand only showed a significant decrease in the first pre- and post- bouts (p<0.05). We observed an inverse relationship between the maximal isometric handgrip strength of post-bouts and maximum lactic acid concentration (Lacmax), and between the maximal isometric handgrip strength of post-bouts and the lactic acid concentration at minute 14 of the recovery period (Lac14) (p<0.05). These results show that successive judo bouts significantly reduce the maximal isometric strength of both hands, and may suggest that fatigue of each hand depends on different factors. An enhanced understanding of the behavior of the isometric handgrip strength, and the factors that affect grip fatigue during judo bouts in the dominant and non-dominant hands, can aid coaches in developing optimal training and exercise interventions that are aimed at mitigating decreases in the capacity of judo athletes to perform a grip.
Authors:
Juan G Bonitch-Góngora; Juan G Bonitch-Domínguez; Paulino Padial; Belen Feriche
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-10-07
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  -     ISSN:  1533-4287     ISO Abbreviation:  -     Publication Date:  2011 Oct 
Date Detail:
Created Date:  2011-10-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
1 Physical Education and Sport Department, FCCAFyD, University of Granada, Carretera de Alfacar s/n, 18011, Granada (Spain).
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