Contributions of lower-limb muscle power in gait of people without impairments

被引:37
|
作者
Sadeghi, H
Allard, P
Duhaime, M
机构
[1] Hop St Justine, Ctr Rech, Montreal, PQ H3T 1C5, Canada
[2] Tarbait Moallem Univ, Minist Sci Res & Technol, Dept Kinesiol, Tehran, Iran
[3] Univ Montreal, Dept Kinesiol, Montreal, PQ, Canada
[4] St Justine Hosp, Res Ctr, Human Movement Lab, Montreal, PQ, Canada
[5] McGill Univ, Shriners Hosp Children, Div Orthoped, Montreal, PQ, Canada
来源
PHYSICAL THERAPY | 2000年 / 80卷 / 12期
关键词
biomechanics; gait analysis; gait symmetry; muscle power;
D O I
10.1093/ptj/80.12.1188
中图分类号
R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学(修复外科学)];
学科分类号
摘要
Background and Purpose. Although gait asymmetry in rehabilitation has been documented, little is known about propulsion and control tasks performed by each limb and how these casks are managed between the lower limbs. The purpose of this study was to test the hypothesis that the leading limb contributes mainly to forward progression, whereas the trailing limb provides control and propels the lower limb to a lesser extent. Subjects. Nineteen men with an average age of 26.2 years (SD=3.2, range=21-34) and no history of orthopedic ailments participated in the study. Methods. Muscle power was determined using an a-camera high-speed video system synchronized with 2 force plates. The principal-component analysis method was applied to reduce and classify 52 gait variables for each limb, and Pearson correlations were used to determine the interactions within the data sets for each limb. Results. Gait propulsion was initiated by the hip of the leading limb shortly after heel-strike and was maintained throughout the stance phase. Control was the main task of the trailing limb, as evidenced by the power absorption bursts at the hip and knee. Conclusion and Discussion. Within-limb interaction further emphasized the functional relationship between forward progression and control tasks and high-lighted the importance of frontal- and transverse-plane actions during gait.
引用
收藏
页码:1188 / 1196
页数:9
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