Camarco Nathalia Ferreira, Neto Ivo Vieira de Sousa, Ribeiro Evaldo, Andrade Anderson J Martino
Department of Physiology, University of Parana, Curitiba 81531-990, Brazil.
Laboratory of Molecular Analysis, Faculty of Ceilândia, Universidade de Brasília, Brasília 70910-900, Brazil.
Biology (Basel). 2022 Jul 30;11(8):1147. doi: 10.3390/biology11081147.
The digit ratio (2D:4D) is related to prenatal testosterone (T) and sports performance. Few investigations have explored 2D:4D in determining the potential performance of individuals in power-based sports, specifically combat sports. This study compared 2D:4D between mixed martial arts (MMA) athletes and non-athletes and investigated the association between (1) handgrip strength (HGS) and lean body mass (LBM) with 2D:4D in MMA athletes and (2) psychometric variables and 2D:4D in MMA athletes and non-athletes. In total, 122 men participated in this study (53 non-athletes, 45 professionals, and 24 amateur fighters). The 2D:4D was measured using a caliper, HGS was assessed with a dynamometer, and psychometric variables were evaluated using questionnaires. Athletes displayed significantly (p < 0.05) lower median values of right (0.95 ± 0.04) and left (0.96 ± 0.03) 2D:4D in comparison with non-athletes, (0.97 ± 0.03) and (0.99 ± 0.03), respectively. We observed that left hand 2D:4D was negatively correlated with HGS (r = −0.43; p < 0.05) and lean body mass (r = −0.49; p < 0.05) in professional athletes. Professional athletes also displayed significant differences (* p < 0.05; ** p < 0.001) in psychometric variables compared to non-athletes for (1) agreeableness **, median values (interquartile range) = −0.11 (−0.19−0.07) and 0.2 (−0.09−0.33), respectively; (2) anger **, mean ± standard error = 2.40 ± 0.12 and 2.89 ± 0.89, respectively; and (3) openness *, mean ± standard error = 0.17 ± 0.04 and −0.006 ± 0.04, respectively. However, we did not observe an association between psychometric variables or wins with 2D:4D. In conjunction with other measures, 2D:4D is valuable in determining the potential athleticism of an MMA athlete.
指长比（2D:4D）与产前睾酮（T）及运动表现相关。很少有研究探讨2D:4D在确定力量型运动（特别是格斗运动）中个体潜在表现方面的作用。本研究比较了综合格斗（MMA）运动员与非运动员的2D:4D，并调查了（1）MMA运动员的握力（HGS）和瘦体重（LBM）与2D:4D之间的关联，以及（2）MMA运动员和非运动员的心理测量变量与2D:4D之间的关联。共有122名男性参与了本研究（53名非运动员、45名职业选手和24名业余格斗选手）。使用卡尺测量2D:4D，用测力计评估HGS，并用问卷评估心理测量变量。与非运动员相比，运动员的右（0.95±0.04）和左（0.96±0.03）2D:4D中位数显著更低（p<0.05），非运动员右、左2D:4D中位数分别为（0.97±0.03）和（0.99±0.03）。我们观察到，职业运动员的左手2D:4D与HGS（r=-0.43；p<0.05）和瘦体重（r=-0.49；p<0.05）呈负相关。与非运动员相比，职业运动员在心理测量变量方面也存在显著差异（p<0.05；p<0.001）：（1）宜人性，中位数（四分位间距）分别为-0.11（-0.19 - 0.07）和0.2（-0.09 - 0.33）；（2）愤怒，均值±标准误分别为2.40±0.12和2.89±0.89；（3）开放性，均值±标准误分别为0.17±0.04和-0.006±0.04。然而，我们未观察到心理测量变量或胜场数与2D:4D之间存在关联。与其他测量方法相结合，2D:4D在确定MMA运动员的潜在运动能力方面具有重要价值。
