Background: The grip dispute (kumi-kata) is an essential element to dominate and control the opponent during the match in grappling combat sports, such as judo and jiu-jitsu. As such,
about 50% of the match corresponds to grip dispute in judo matches (Marcon et al., 2010), demanding high strength endurance development. Specific tests were developed to evaluate judo-specific grip
endurance (Franchini et al., 2011), but no normative tables are available. Therefore, the objective of this study was to develop normative tables for dynamic and isometric judogi chin-ups for judo
athletes. Methods: 138 experienced Brazilian judo athletes from state to Olympic level volunteered to participated in this study (mean ± SD, age: 25.3 ± 6.1 years; height: 175.8 ± 8.9
cm; body mass: 84.1 ± 21.2 kg). The evaluations were carried out during the competitive period and followed the original recommendations (Franchini et al., 2011). During the isometric test athletes
were required to maintain their chin above the bar line for as long as possible, while maintaining their elbows totally flexed. After 15 min rest, the dynamic test was performed. In this test the
athletes had to perform maximal dynamic repetitions until failure, extending and flexing the elbows totally. Moreover, the maximal isometric handgrip strength test for both hands was carried out to in
order to correlate values obtained in the judogi chin-up tests. The Kolmogorov-Smirnov test was conducted in order to confirm data normality. The data was distributed in five classification scales,
i.e., the percentiles were distributed in ≤ 10% (very poor), 11 to 25% (poor), 26 to 75% (regular), 76 to 90% (good) and > 90% (excellent). Pearson´s correlation was conducted, with significance level
established at 5%.
Results:Correlations were observed between body mass and isometric judogi chin-ups (r = -0.69), dynamic judogi chin-ups (r = -0.62), and sum of right and left maximum isometric
strength (r = -0.51). Isometric judogi chin-up was correlated to dynamic judogi chin-up (r = 0.72) and sum of right and left maximum isometric strength (r = 0.61), while the correlation between
dynamic judogi chin-up and sum of right and left maximum isometric strength was (r = 0.65). Following the Classification norms for dynamic and isometric judogi chin-ups for judo athletes. Isometric
judogi chin-ups (s): very poor: ≤ 10; poor: 11-25; regular: 26-55; good: 56-62 and excellent: ≥ 63. Dynamic judogi chin-ups (rep): very poor: ≤ 1; poor: 2-6; regular: 7-16; good: 17-19 and excellent:
≥ 20. Conclusion: The table can be used as a reference for isometric and strength grip endurance of judo athletes, with low-cost and simple materials.