Department of Clinical Neurology, University of Oxford , UK ; School of Biological and Molecular Sciences, Oxford Brookes University , UK.
School of Healthcare, Oxford Brookes University , UK.
J Sports Sci Med. 2005 Dec 1;4(4):556-62. eCollection 2005 Dec.
We examined explosive leg extensor power (LEP) and gait in men and women after a stroke using an experimental observational design. A convenience sample of consecutively referred individuals (8 men, 6 women) with chronic stroke mean age ± SD, range, 46.4 ± 8.4, 32 - 57 years, and able to walk for four minutes were recruited. The test re-test reliability and performance of LEP was measured together with walking parameters. LEP (Watts·kg(-1)) and gait measures during a four-minute walk; temporal-spatial gait parameters (GAITRite(®)) and oxygen cost of walking (mL·kg(-1)·m(-1)) were recorded. Percentage Asymmetry LEP (stronger LEP - weaker LEP/stronger LEP x 100) was calculated for each person. LEP was reliable from test to re-test ICC [3, 1] 0.8 - 0.7 (n = 9). Greater Asymmetry LEP correlated strongly with reduced walking velocity, cadence, stance time, and swing time on the weaker leg (n = 14) (p < 0.01). Findings demonstrate explosive LEP, in particular Percentage Asymmetry LEP, can be measured after stroke and is both reliable and related to walking performance. LEP training of the stronger or weaker leg warrants further investigation in this group. Key PointsExplosive leg power (LEP) is a reliable measure in individuals recovering from a stroke.Significant asymmetry occurred in LEP in this group.Greater LEP asymmetry related to reduced walking performance after stroke.
我们采用实验观察设计，研究了男性和女性脑卒中患者的腿部爆发力（LEP）和步态。一项连续纳入的便利性样本包括 8 名男性和 6 名女性慢性脑卒中患者（平均年龄±标准差，范围：46.4±8.4，32-57 岁，能够连续行走 4 分钟）。我们一起测量了 LEP 的测试-再测试可靠性和性能以及行走参数。LEP（瓦特·千克-1）和 4 分钟步行时的步态参数（GAITRite ®）和步行的耗氧量（mL·kg-1·m-1）。记录了每位患者的腿部爆发力（更强的腿-较弱的腿/更强的腿×100）的百分比不对称性。LEP 的测试-再测试 ICC [3,1]为 0.8-0.7（n=9），可靠性较高。较强腿的不对称性 LEP 与较弱腿的步行速度、步频、站立时间和摆动时间降低显著相关（n=14）（p<0.01）。研究结果表明，脑卒中后可测量到爆发性腿部力量（尤其是百分比不对称性 LEP），并且具有可靠性和与步行表现的相关性。在这组患者中，应进一步研究对较强或较弱腿的 LEP 训练。关键点脑卒中康复患者的腿部爆发力（LEP）是一种可靠的测量方法。该组患者的 LEP 存在明显的不对称性。较大的 LEP 不对称性与脑卒中后步行能力下降有关。
