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首页> 外文期刊>Journal of Biomechanics >How does postural stability following a single leg drop jump landing task relate to postural stability during a single leg stance balance task?
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How does postural stability following a single leg drop jump landing task relate to postural stability during a single leg stance balance task?

机译：单腿下降跳跃着陆任务后的姿势稳定性与单腿姿势平衡任务期间的姿势稳定性如何相关？

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摘要

We aimed to verify whether the static phase after a single leg drop jump (DJ) landing on a force plate may serve as a proxy for a single leg stance (SLS) balance task, as this would increase the application possibilities of landing tasks in the evaluation of sensorimotor function in relation to injury rehabilitation or performance assessment.Twenty-five healthy participants performed two sessions of five valid trials for both tasks in a reproducibility-agreement design. Three postural stability outcome measures ('COP speed', 'COP sway' and 'Horizontal GRF') were calculated for DJ (5-20. s after landing) and for SLS (15. s), and were averaged per session. Paired T-tests revealed a learning effect of SLS for postural stability (4.6-6.1%; P-values <0.03), in contrast to DJ (. P-values >0.27). Only session 2 resulted in superior postural stability for SLS compared to DJ for 'COP speed' (5.0%; P=0.017) and 'Horizontal GRF' (8.2%; P=0.001). Bland and Altman methods demonstrated inter-session SD's of difference for DJ of 11-12% and for SLS of 10-12%, while inter-task SD's of difference ranged 10-17%. Precision ('SD within') was better for SLS concerning 'COP speed' (14-15% vs 13%) and 'Horizontal GRF' (18-20% vs 14-15%). In conclusion, postural stability during DJ and SLS cannot be considered interchangeable, due to a learning effect for SLS and inferior precision for DJ. However, a DJ task may be used as a proxy for static postural stability, although more than three trials are needed to achieve individual errors similar to SLS for 'COP speed' (4) and 'Horizontal GRF' (5).
机译：我们旨在验证单腿跌落跳跃（DJ）降落在力板上后的静态相位是否可以替代单腿姿态（SLS）平衡任务，因为这将增加在飞机上着陆任务的应用可能性评估与损伤康复或表现评估相关的感觉运动功能。25名健康参与者在可重复性协议设计中对两项任务进行了两次为期五次有效试验的研究。计算了DJ（着陆后5-20 s）和SLS（15。s）的三种姿势稳定性结果测量值（“ COP speed”，“ COP sway”和“ Horizo​​ntal GRF”），并将其平均计算。配对的T检验显示了SLS对姿势稳定性的学习效果（4.6-6.1％; P值<0.03），而DJ则相反（。P值> 0.27）。与DJ相比，只有第2阶段的SLS的姿势稳定性优于COP的DJ（5.0％; P = 0.017）和“ Horizo​​ntal GRF”（8.2％; P = 0.001）。 Bland和Altman方法证明DJ会话间SD的差异为11-12％，SLS的会话间SD的差异为10-12％，而任务间SD的差异为10-17％。对于SLS，在“ COP速度”（14-15％对13％）和“水平GRF”（18-20％对14-15％）方面，精度（“ SD内”）更好。总之，由于SLS的学习效果和DJ的精度较低，DJ和SLS期间的姿势稳定性不能被认为是可以互换的。但是，DJ任务可以用作静态姿势稳定性的代理，尽管需要进行三项以上的试验来实现类似于“ COP speed”（4）和“ Horizo​​ntal GRF”（5）的SLS的单个错误。

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