This cross-sectional study evaluated the sprint and jump mechanical profiles of male academy rugby league players, the differences between positions, and the associations between mechanical profiles and sprint performance. Twenty academy rugby league players performed 40-m sprints and squat jumps at increasing loads (0–80 kg) to determine individual mechanical (force-velocity-power) and performance variables. The mechanical variables (absolute and relative theoretical maximal force-velocity-power, force-velocity linear relationship, and mechanical efficiency) were determined from the mechanical profiles. Forwards had significantly (p < 0.05) greater vertical and horizontal force, momentum but jumped lower (unloaded) and were slower than backs. No athlete presented an optimal jump profile. No associations were found between jump and sprint mechanical variables. Absolute theoretical maximal vertical force significantly (p < 0.05) correlated (r = 0.71–0.77) with sprint momentum. Moderate (r = −0.47) to near-perfect (r = 1.00) significant associations (p < 0.05) were found between sprint mechanical and performance variables. The largest associations shifted from maximum relative horizontal force-power generation and application to maximum velocity capabilities and force application at high velocities as distance increased. The jump and sprint mechanical profiles appear to provide distinctive and highly variable information about academy rugby league players’ sprint and jump capacities. Associations between mechanical variables and sprint performance suggest horizontal and vertical profiles differ and should be trained accordingly.

中文翻译：

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学院橄榄球联盟球员的冲刺和跳跃机械配置文件：位置差异以及配置文件与冲刺性能之间的关联

这项横断面研究评估了男性学院橄榄球联盟球员的冲刺和跳跃机械特征、位置之间的差异以及机械特征与冲刺表现之间的关联。20 名学院橄榄球联盟球员以增加的负荷（0-80 公斤）进行 40 米短跑和深蹲跳跃，以确定个人机械（力-速度-功率）和性能变量。机械变量（绝对和相对理论最大力-速度-功率、力-速度线性关系和机械效率）由机械轮廓确定。远期有显着 ( p< 0.05）更大的垂直和水平力，动量但跳得更低（卸载）并且比背部慢。没有运动员呈现出最佳的跳跃曲线。没有发现跳跃和冲刺机械变量之间的关联。绝对理论最大垂直力 ( p < 0.05) 与冲刺动量显着相关 (r = 0.71–0.77)。中等 (r = -0.47) 到近乎完美 (r = 1.00) 的显着关联 ( p< 0.05) 被发现在冲刺机械和性能变量之间。随着距离的增加，最大的关联从最大的相对水平力发电和应用转变为最大速度能力和高速下的力应用。跳跃和冲刺机械配置文件似乎提供了有关学院橄榄球联盟球员冲刺和跳跃能力的独特且高度可变的信息。机械变量和冲刺表现之间的关联表明水平和垂直剖面不同，应该进行相应的训练。