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

Article type: Research Article

Authors: Ojeda-Aravena, Alex^{a; b; *} | Herrera-Valenzuela, Tomás^{c; d} | Valdés-Badilla, Pablo^e | Azócar-Gallardo, Jairo^{g; h} | Campos-Uribe, Victor^f | García-García, José Manuel^b

Affiliations: [a] Department of Physical Activity Sciences, Universidad de Los Lagos, Osorno, Chile | [b] Faculty of Sport Sciences, Sports Training Laboratory, Universidad de Castilla-La Mancha, Toledo, Spain | [c] School of Sports and Physical Activity Sciences, Faculty of Health, Universidad Santo Tomás, Santiago, Chile | [d] School of Physical Activity, Sport and Health Sciences, Universidad de Santiago de Chile, Santiago, Chile | [e] Department of Physical Activity Sciences, Faculty of Education Sciences, Universidad Católica del Maule, Talca, Chile | [f] Programa de Vida Saludable, Actividad Física y Deporte, Undergraduate Studies Universidad de Talca Campus Curicó, Curicó, Chile | [g] Laboratory of Human Performance, Life and Wellness Quality Research Group, Department of Physical Activity Sciences, University of Los Lagos, Osorno, Chile | [h] Department of Physical Activity Sciences, University of Los Lagos, Puerto Montt, Chile

Correspondence: [*] Corresponding author: Alex Ojeda-Aravena, Department of Physical Activity Sciences, Universidad de Los Lagos, Osorno, Chile. %****␣ies-30-ies210114_temp.tex␣Line␣25␣**** Tel.: +56 991 975 231; E-mail: [email protected].

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.

Keywords: Combat sports, martial arts, athletic performance, muscle strength, motion perception

DOI: 10.3233/IES-210114

Journal: Isokinetics and Exercise Science, vol. 30, no. 1, pp. 29-38, 2022