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INFLUENCE OF THE NUMBER OF TRIALS AND THE EXERCISE TO REST RATIO IN REPEATED SPRINT ABILITY, WITH CHANGES OF DIRECTION AND ORIENTATION.
MedLine Citation:
PMID:  23007490     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
ABSTRACT: The purpose of this investigation was to determine if there were different trends in physical fatigue observed in three different sets, of seven trials each, in repeated sprints training, performed in three different modes: straight sprinting over 30 m., shuttle sprinting over 15 +15 m., sprinting over 30 m. with changes of direction (COD). Recovery times among trials in the sets were administered according to the 1:5 exercise to rest ratio. The sets were performed on three different days, with at least 48 hours between each set. The study involved 17 trained male soccer players (Height: 177.33 ± 6.21 cm; Body Mass: 71.63 ± 9.58 kg; BMI: 23 ± 2.39 kg/m; Age: 21.94 ± 3.58 years). In order to compare the different values of the time recorded, an Index of Fatigue was used. Significant differences among trials within each set (Repeated Measures Anova; p<0.05) and between the sets (Factorial Anova; p<0.001) were found. Significant correlations between each test and CMJ and Stiffness values recorded pre exercise, were found (p<0.05). Significant differences between CMJ and Stiffness values recorded pre and post exercise were also found (p<0.05). This study suggests that training sessions aimed at increasing the capacity of repeated sprint ability in non-linear and multidirectional sprints, (shuttle and change of direction), might imply a different number of trials within the set or different exercise to rest ratios from the ones usually adopted for straight sprinting, in order to induce similar trends of fatigue.As practical applications, the estimated numbers of necessary trials in the different sets and the possible exercise to rest ratios, resulting from mathematical modeling, are provided for each investigated sprinting mode.
Authors:
Bruno Ruscello; Nazzareno Tozzo; Gianluca Briotti; Elvira Padua; Francesco Ponzetti; Stefano D'Ottavio
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-9-21
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  -     ISSN:  1533-4287     ISO Abbreviation:  J Strength Cond Res     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-9-25     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:
1University of Rome "Tor Vergata", Faculty of Medicine and Surgery, School of Sports and Exercise Sciences 2 Federazione Italiana Giuoco Calcio.
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