Bilateral deficit in the countermovement jump and its associations with judo-specific performance,Research in Sports Medicine

ABSTRACT

This study aimed to describe the bilateral deficit (BLD) during the countermovement jump (CMJ) in judo athletes and determine the relationship between the BLD and judo-specific performance. Fourteen male judo athletes participated. Athletes performed three specific judo tests, Maximal Sprint Speed Judo Test, Maximal Aerobic Speed Judo Test and Special Judo Fitness Test (SJFT), and double- and single-leg CMJ. The following CMJ variables were used: jump height (JH), mean (MPO) and peak (PPO) power output, peak force (PF), peak velocity (PV) and impulse (IMP). The Pearson’s or Spearman’s test were used (p < 0.05). The results show that the BLD is found in all CMJ parameters (20 to 31%). Negative correlations between first set of SJFT_TT (total throws) and BLD in PF (r = −0.60; p= 0.022) and between the second set of SJFT_TT and BLD in MPO (r= −0.74;p = 0.002), PV (r =−0.59;p = 0.025) and IMP (r =−0.55; p = 0.040) were found. Also, negative correlations between SJFT_TT and the BLD in all CMJ parameters (r= −0.53 to −0.85; p < 0.05) were found. Higher values of BLD are related to poor SJFT_TT performance.

Chinese translation:

Bilateral defects in reverse jumps and their association with specific performances in judo

Summary

The purpose of this study is to describe the bilateral defects (BLD) of judo players during the reverse jump (CMJ) and to determine the relationship between BLD and specific judo performance. Fourteen male judo players participated in the competition. Athletes underwent three specific judo tests, the maximum sprint speed judo test, the maximum aerobic speed judo test and the special judo physical fitness test (SJFT), as well as the double and single leg CMJ. The following CMJ variables are used: jump height (JH), average (MPO) and peak (PPO) power output, peak force (PF), peak velocity (PV), and impulse (IMP). Use Pearson or Spearman test (p <0.05). The results showed that BLD was found in all CMJ parameters (20% to 31%). The first set of SJFT _TTNegative correlation_{(Total throws) and BLD in PF (r = -0.60; p = 0.022) and the second set of SJFT TTAnd BLD (r = -0.74; p = 0.002), PV (r = -0.59; p = 0.025) and IMP (r = -0.55; p = 0.040) in MPO were found. In addition, in all CMJ parameters (r = -0.53 to -0.85; p <0.05), SJFT TTThere is a negative correlation between BLD and BLD. Higher BLD value and worse SJFT TTPerformance related.}