Neuromuscular strength, not sagittal-plane joint or modeled muscle-tendon kinematics, is associated with 50-m sprint performance in youth male sprinters.

All four split intervals and the total time showed highly significant differences across the three groups (all p < 0.001), with effect sizes uniformly in the very large range (η 2 /ε 2 = 0.70–0.88).

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