Effects of external verbal cueing on countermovement rebound jump performance.

This study examined the effects of three external verbal cues on countermovement rebound jump (CMRJ) performance. Twenty-five recreational athletes completed nine jumps with distinct height, velocity and combined cue focus. A general linear model analysis of variance was used to evaluate systematic bias between conditions ( p  < 0.05). The height and velocity cues significantly altered jump height and contact times in both jumps during the CMRJ, respectively ( p  ≤ 0.002). The combined cue significantly reduced contact time while increasing leg stiffness compared to the height cue ( p ≤ 0.038). It also increased jump height compared to the velocity cue ( p  ≤ 0.005) in both jumps, resulting in the highest explosive power and reactive strength values among all conditions. Furthermore, the combined cue enhanced the positive ankle contribution compared to the height cue ( p  = 0.020) and increased positive hip and negative knee joint work compared to the velocity cue ( p  ≤ 0.040) in the second jump of the CMRJ. These findings advise practitioners to use the height cue to maximise jump height, the velocity cue to minimise contact times and the combined cue to maximise explosive power and reactive strength.