Abstract
The purpose of this study was to investigate the relationship between sprint and jump performance with velocity parameters in the loaded-squat jump exercise (SQLoaded). In accordance with this purpose, a total of 13 athletes competing in martial sports have participated in this study voluntarily. In this study, sprint tests, vertical jump (VJ), standing long jump (SLJ) tests and one repetition maximal strength test were applied. In order to determine velocity and power parameters, SQLoaded exercise was applied by using an external load that corresponds to 40% of body weights of the subjects via an isoinertial velocity transducer (T-Force dynamic measurement system) and values of mean propulsive velocity (MPV), peak velocity (PV), mean propulsive power (MPP) and peak power (PP) were obtained. Descriptive statistics, Spearman correlation analysis and Shapiro-Wilk normality tests were used for data assessment. It has been concluded that there is no statistically significant relation between 10, 20 and 30 meter sprint times and the values of MPV (r= -,332; r= -,375; r= -,446; p>.05 respectively), PV (r= -,058; r= -,118; r= -,165; p>.05 respectively), MPP (r= -,285; r= -,482; r= -,485; p>.05 respectively) and PP (r= -,205; r= -,512; r= -,391; p>.05 respectively) during SQLoaded exercise. In addition, while no statistically significant relation has been obtained between the VJ and SLJ values of the participants and MPV (r= ,496; r = ,429; p>.05 respectively) and PV (r= ,300; r= ,223; p>.05 respectively) values during propulsive stage of SQLoaded exercise, it has been ascertained that there is a statistically positive and significant relation between the values of MPP(r= ,620; r= ,580; p>.05 respectively) and PP (r= ,678; r=,572; p<.05 respectively). In conclusion, it can be suggested that lifting velocity and power values don't have a positive effect on short sprint performance; however power values affect the vertical jump and standing long jump performances positively.
Highlights
Power being among the important factors of athletic performance possesses a time component and denotes the mechanical amount defined as the temporal rate of work done and it generally depends on the ability of creating the maximum possible force [1,2]
It was determined that there was no statistically significant relation between vertical jump (VJ) and standing long jump (SLJ) values of the participants and mean propulsive velocity (MPV) (r=,496; r=,429; p>0.05, respectively) and peak velocity (PV) (r=,300; r=,223; p>0.05, respectively) values during propulsive phase of SJLoaded exercise while a statistically positive and significant relation was established between mean propulsive power (MPP) (r=,620; r=,580; p>0.05, respectively) and peak power (PP) (r=,678; r=,572; p
While no statistically significant relation was ascertained between the 1RMSQ values of the participants and MPV (r=,426; p>0.05) and PV (r=,267; p>0.05) values during the propulsive phase of SJLoaded exercise, a statistically positive and highly significant relation was found between MPP (r=,733; p> 0.01) and PP (r=,796; p
Summary
Power being among the important factors of athletic performance possesses a time component and denotes the mechanical amount defined as the temporal rate of work done (power=work/time) and it generally depends on the ability of creating the maximum possible force (maximal force) [1,2]. The load that maximizes the mechanical efficiency depends on such parameters as MP, MPP and PP [6,7]. These parameters can be used in order to create a central variable thought to be important for power and performance in explosive type of studies. This variable is the training load that maximizes the mechanical efficiency of the muscle [5,6,8].
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