Departament of Physical Education, Federal University of Lavras, Lavras, Brazil.
Exercise Psychophysiology Research Group, School of Arts Sciences and Humanites, University of Sao Paulo, Sao Paulo, Brazil.
Int J Sports Med. 2019 Nov;40(12):774-778. doi: 10.1055/a-0929-6985. Epub 2019 Sep 2.
We compared results of Special Judo Fitness Test (SJFT) performance of young athletes of two different age categories after correcting body mass (BM) variations by allometric scales. Thirty young judokas (14.2±3.6 years) belonging to two age categories underwent an SJFT: under 15 (U15) years old (12.1±2.4 years; 46.5±15.6 kg; 152.4±11.2 cm) and under 21 years old (U21) (18.2±0.8 years; 77.1±23.5 kg; 174.2±8.9 cm). Allometric exponents of -0.33 and 0.67 were used to correct the influence of BM variations on SJFT performance results. After correction using the -0.33 exponent, U21 showed a higher number of throws (TNT) than U15 (85.5±9.9 and 68.8±12.0, p<0.05, respectively), although the SJFT index had been similar between these groups (67.3±10.1 and 61.7±8.1, p>0.05, respectively). In contrast, TNT normalized by the 0.67 exponent was higher in U15 than U21 (1.55±0.29 and 1.17 ± 0.25, p<0.05, respectively). Likewise, the SJFT index was higher in U15 than in U21 when using the same exponent (1.55±0.29 and 1.17±0.25, p<0.05, respectively). In conclusion, the -0.33 exponent may be useful to remove the influence of BM variations, thus discriminating SJFT performance results in U15 and U21 judokas. Moreover, the 0.67 exponent may overestimate SJFT indices in low-age judokas.
我们比较了两种不同年龄组的年轻运动员在通过体质量（BM）的变异性进行校正后的特殊柔道健身测试（SJFT）表现。30 名年轻柔道运动员（14.2±3.6 岁）分为两个年龄组：15 岁以下（U15）（12.1±2.4 岁；46.5±15.6kg；152.4±11.2cm）和 21 岁以下（U21）（18.2±0.8 岁；77.1±23.5kg；174.2±8.9cm）。使用-0.33 和 0.67 的幂指数来校正 BM 变异对 SJFT 表现结果的影响。使用-0.33 指数校正后，U21 的投掷次数（TNT）高于 U15（85.5±9.9 和 68.8±12.0，p<0.05），尽管这两组的 SJFT 指数相似（67.3±10.1 和 61.7±8.1，p>0.05）。相反，当使用 0.67 幂指数时，U15 的 TNT 归一化值高于 U21（1.55±0.29 和 1.17±0.25，p<0.05）。同样，当使用相同的幂指数时，U15 的 SJFT 指数高于 U21（1.55±0.29 和 1.17±0.25，p<0.05）。总之，-0.33 指数可能有助于消除 BM 变异的影响，从而区分 U15 和 U21 柔道运动员的 SJFT 表现结果。此外，0.67 指数可能高估了低龄柔道运动员的 SJFT 指数。
