The purpose of this study was to determine the usefulness of calculating jump take-off momentum in rugby league (RL) by exploring its relationship with sprint momentum, due to the latter being an important attribute of this sport. Twenty-five male RL players performed 3 maximal-effort countermovement jumps on a force platform and 3 maximal effort 20-m sprints (with split times recorded). Jump take-off momentum and sprint momentum (between 0 and 5, 5 and 10, and 10 and 20 m) were calculated (mass multiplied by velocity) and their relationship determined. There was a very large positive relationship between both jump take-off and 0- to 5-m sprint momentum (r = .781, P < .001) and jump take-off and 5- to 10-m sprint momentum (r = .878, P < .001). There was a nearly perfect positive relationship between jump take-off and 10- to 20-m sprint momentum (r = .920, P < .001). Jump take-off and sprint momentum demonstrated good–excellent reliability and very large–nearly perfect associations (61%–85% common variance) in an RL cohort, enabling prediction equations to be created. Thus, it may be practically useful to calculate jump take-off momentum as part of routine countermovement jump testing of RL players and other collision-sport athletes to enable the indirect monitoring of sprint momentum.

本研究的目的是通过探索橄榄球联盟 (RL) 中计算跳跃起跳动量与冲刺动量的关系来确定计算跳跃起跳动量的有用性，因为后者是这项运动的重要属性。25 名男性 RL 运动员在力量平台上进行了 3 次最大努力反向运动跳跃和 3 次最大努力 20 米冲刺（记录分段时间）。计算跳跃起飞动量和冲刺动量（0 到 5、5 到 10、10 到 20 m 之间）（质量乘以速度）并确定它们的关系。跳跃起跳与 0 至 5 米冲刺动量 ( r  = .781, P  < .001) 以及跳跃起跳与 5 至 10 米冲刺动量 ( r  = .878，P  < .001）。跳跃起跳和 10 至 20 米冲刺动量之间存在近乎完美的正相关关系（r  = .920，P  < .001）。在 RL 队列中，跳跃起飞和冲刺动力表现出良好的可靠性和非常大的近乎完美的关联（61%–85% 的共同方差），从而能够创建预测方程。因此，作为 RL 运动员和其他碰撞运动运动员的常规反向运动跳跃测试的一部分，计算跳跃起跳动量可能非常有用，从而能够间接监测冲刺动量。