Relationship between explosive strength characteristics with change of direction speed in junior and cadet karate athletes

IF 0.6 4区医学 Q4 ENGINEERING, BIOMEDICAL

Isokinetics and Exercise Science Pub Date : 2021-05-28 DOI:10.3233/IES-210114

Alex Ojeda-Aravena, T. Herrera-Valenzuela, P. Valdés-Badilla, Jairo Azócar-Gallardo, Victor Campos-Uribe, J. M. García-García

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引用次数: 1

Abstract

BACKGROUND: Explosive strength and change of direction speed (CODS) are relevant physical abilities in karate. OBJECTIVE: To examine the relationship between the characteristics of explosive strength and the 5-m linear sprint (5M) with CODS performance and ii) to examine the influential characteristics of explosive strength on CODS performance. METHODS: Eighteen cadet and junior karate athletes, eight females and ten males were evaluated. The physical abilities assessments included: squat jump (SJ), countermovement jump (CMJ), 5M and CODS. Also, pre-stretch percentage increase (PSA), eccentric utilization index (EUR) reactive strength index (RSI) were calculated. RESULTS: Superior performance (p< 0.05) was documented in SJ, CMJ and CODS in male vs. female. Also, significant correlations between CODS with SJ and CMJ (r=-0.70 to -0.80; R2=-0.51 to -0.73; p< 0.05, respectively) and correlations (r=-0.14 to -0.22; R2= 0.01 to 0.04; p> 0.05) between CODS with RSI, EUR and PSA. Multiple regression model documented that only SJ significantly influenced CODS performance in male (R2= 60%; p= 0.009) and female (R2= 71%; p= 0.001). CONCLUSION: CODS correlate with SJ and CMJ. In particular, SJ influence CODS independently of gender.

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青少年空手道运动员爆发力特征与方向速度变化的关系

背景：爆发力和转向速度（CODS）是空手道的相关体能。目的：研究5米直线短跑（5M）的爆发力特征与CODS性能之间的关系；2）研究爆发力特征对CODS性能的影响。方法：对18名青少年和青少年空手道运动员，8名女性和10名男性进行评估。体能评估包括：深蹲跳（SJ）、反跳（CMJ）、5M和CODS。此外，还计算了拉伸前百分比增加（PSA）、偏心利用指数（EUR）反应强度指数（RSI）。结果：SJ、CMJ和CODS在男性和女性中表现优异（p<0.05）。CODS与SJ和CMJ之间存在显著相关性（r=-0.70至-0.80；R2=-0.51至-0.73；p<0.05），CODS与RSI、EUR和PSA之间存在显著相关（r=-0.14至-0.22；R2=0.01至0.04；p>0.05）。多元回归模型表明，只有SJ对男性（R2=60%；p=0.009）和女性（R2=71%；p=0.001）的CODS表现有显著影响。结论：CODS与SJ和CMJ相关。特别是SJ对CODS的影响与性别无关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Isokinetics and Exercise Science 医学-工程：生物医学

CiteScore

1.20

自引率

14.30%

发文量

审稿时长

>12 weeks

期刊介绍： Isokinetics and Exercise Science (IES) is an international journal devoted to the study of theoretical and applied aspects of human muscle performance. Since isokinetic dynamometry constitutes the major tool in this area, the journal takes a particular interest in exploring the considerable potential of this technology. IES publishes studies associated with the methodology of muscle performance especially with respect to the issues of reproducibility and validity of testing, description of normal and pathological mechanical parameters which are derivable from muscle testing, applications in basic research topics such as motor learning paradigms and electromyography. The journal also publishes studies on applications in clinical settings and technical aspects of the various measurement systems employed in human muscle performance research. The journal welcomes submissions in the form of research papers, reviews, case studies and technical reports from professionals in the fields of sports medicine, orthopaedic and neurological rehabilitation and exercise physiology.