This study was performed aimed at comparing multidirectional bilateral and unilateral jump performance and passive range of motion (ROM) of lower limbs between soccer and basketball young players and evaluating associations between inter-limb ROM asymmetry and bilateral jump performance. A total of 67 young male athletes participated in this study, who were classified as soccer (n = 40; 15.55 ± 1.5 y; 1.76 ± 0.12 m; 58.15 ± 10.82 kg; 19.84 ± 2.98 kg·m²) and basketball (n = 27; 15.7 ± 1.66 y; 1.76 ± 0.12 m; 62.33 ± 16.57 kg; 19.84 ± 2.98 kg·m²) players. Participants were asked to perform bilateral and unilateral multidirectional jumps, and passive ROM of hip (flexion, extension and abduction), knee (flexion) and ankle (dorsiflexion) joints was also assessed. Significant between-group differences were observed for hip extension with flexed knee ROM in dominant (soccer: 142.43 ± 7.74°; basketball: 148.63 ± 8.10°) and non-dominant (soccer: 144.38 ± 8.36°; basketball: 148.63 ± 6.45°) legs; hip flexion with flexed knee ROM in dominant (soccer: 13.26 ± 4.71°; basketball: 9.96 ± 3.42°) and non-dominant (soccer: 12.86 ± 4.55°; basketball: 9.70 ± 3.62°) legs; and for the ratio of hip abduction (soccer: 1.02 ± 0.08; basketball: 0.97 ± 0.11). However, no significant between-group differences were observed for bilateral and unilateral jump capacity, or for inter-limb asymmetries (dominant vs. non-dominant leg). Finally, no associations were observed between ROM ratio (dominant vs. non-dominant leg) and bilateral jump performance. These findings lead to the suggestion that differences on passive ROM values in young male athletes may be sport-specific. Additionally, there seems to be need for the implementation of training strategies specifically aimed at improving bilateral or unilateral jump ability, or at diminishing inter limb passive ROM differences in order to improve multidirectional jump performance for neither soccer nor basketball youth male players.

本研究旨在比较足球和篮球年轻运动员的多向双边和单边跳跃表现以及下肢被动运动范围（ROM），并评估肢体间ROM不对称性与双边跳跃表现之间的关联。共有 67 名年轻男性运动员参与了这项研究，他们被分为足球（n = 40；15.55 ± 1.5 y；1.76 ± 0.12 m；58.15 ± 10.82 kg；19.84 ± 2.98 kg·m ² ）和篮球（n = 27; 15.7 ± 1.66 岁; 1.76 ± 0.12 m; 62.33 ± 16.57 公斤; 19.84 ± 2.98 公斤·米² ) 运动员。参与者被要求进行双侧和单侧多向跳跃，并评估髋关节（屈曲、伸展和外展）、膝关节（屈曲）和踝关节（背屈）的被动活动度。在主导型（足球：142.43 ± 7.74°；篮球：148.63 ± 8.10°）和非主导型（足球：144.38 ± 8.36°；篮球：148.63 ± 6.45°）中观察到髋关节伸展和屈膝 ROM 存在显着组间差异腿；主导腿（足球：13.26 ± 4.71°；篮球：9.96 ± 3.42°）和非主导腿（足球：12.86 ± 4.55°；篮球：9.70 ± 3.62°）髋部屈曲，膝关节活动度弯曲；以及髋部外展比率（足球：1.02 ± 0.08；篮球：0.97 ± 0.11）。然而，双侧和单侧跳跃能力或肢体间不对称性（优势腿与非优势腿）没有观察到显着的组间差异。最后，没有观察到 ROM 比率（优势腿与非优势腿）和双侧跳跃表现之间的关联。这些发现表明，年轻男性运动员的被动活动度值的差异可能是特定于运动项目的。 此外，似乎需要实施专门旨在提高双侧或单侧跳跃能力或减少肢体间被动ROM差异的训练策略，以提高足球和篮球青年男子运动员的多向跳跃表现。