WALKING SPEED OF NORMAL SUBJECTS AND AMPUTEES - ASPECTS OF VALIDITY OF GAIT ANALYSIS

This study investigated some aspects of the validity of walking speed recording in 15 normal subjects. 16 trans-femoral empathics and 8 knee disarticulation amputees. The variability and test-retest reliability of walking speed and the influence of simultaneous recording of EMG a nd goniometry on comfortable and fast walking speeds were studied. The variability between sessions was mainly determined by the variance wi thin each session. The variance of speed within sessions while walking with fast speed, was higher when walking without equipment than when walking with equipment. The variances of speed within sessions. of the normal subjects were higher than those for both amputee groups. The t est-retest reliability, expressed by the intra-class correlation coeff icient, was good: between 0.83 and 0.98. The speed when walking withou t equipment was significantly higher both in normal subjects and amput ees than the speed when walking with equipment.