젊은 성인의 평지 및 트레드밀 보행 시 Stride Time의 변화성
Stride Time Variability on the Overground & Treadmill Walking in the healthy adults
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참고문헌
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초록
이 연구의 목적은 평지와 두 가지 조건의 트레드밀 보행 시 보행 변화성의 영향을 살펴보는 것이다. 근골격계 이상이 없는 9명(24.6±1.1 year, 175.2±4.8 cm, 68.4±6.5 kg, right-handed)이 실험에 참여하였다. 모든 피험자는 평지 (overground walking, OW), 일반적으로 속도가 고정된 트레드밀(FT), 자동적으로 보행자의 걷는 속도와 트레드밀의 속도를 맞춰주는 속도 자동 적응형 트레드밀 (AT)에서 각 10분씩 보행을 수행하였다. stride time을 이용하여, 평균 stride time, 분산계수(coefficient of variance, CV) DFA(detrended Fluctuation Analysis)를 구하여 분석하였다. 분산계수는 변화의 크기를 정량적으로 나타내며,DFA는 변화의 구조, 즉 자기유사성을 나타낸다. 그 결과, OW와 AT조건보다 FT조건의 CV가 통계적으로유의하게 작았고, DFA는 OW조건에서 다른 조건에 비해 작은 값을 보였다. 따라서, 보행 변화성에 대한 연구자의 관심 영역이 보행 변화성의 크기 또는 구조적인 것인가에 따라 적절한 보행 실험조건의 선택이 필요하다.
Abstract
The purpose of this study is to evaluate an effects on gait variability by overground and two kinds of treadmill walking. Nine male subjects (24.6±1.1 year, 175.2±4.8 cm, 68.4±6.5 kg, right-handed) with no neuromuscular disease were participated for this experiment. All subjects walked at the preferred (self-selected) walking speed for 10 minutes on three walking conditions: overground (OW), traditional treadmill by fixed speed (FT) and treadmill whose speed adjusted automatically by subject's walking speed (AT). Using stride time, average stride time, Coefficient of variance (CV) which quantifies the amount of variability and Detrended Fluctuation Analysis (DFA) which explains the structure (i.e. self-similarity) of the variability were used for analysis. The results revealed that FT condition was a smaller than OW and AT condition in CV of stride time, while in DFA of stride time, OW condition was a smaller than the other conditions. Therefore, it is necessary to select for suitable walking condition of overground or 2 types of treadmill depends on what interest researcher do: such as amount or structure of gait variability.
참고문헌 (22)
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