보행계수기의 착용위치 불변성 연구
Pedometer Accuracy in Wearing Location and Difference Walking Conditions
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참고문헌
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초록
이 연구는 일상적 신체활동의 피드백, 객관적 평가에 보편적으로 적용되고 있는 보행계수기의 신뢰도 타당도 검증을 위하여 특정 기종별, 착용 위치별로 실제 보행 수 측정의 차이 정도를 규명하는데 목적이 있다. 여자대학생 15명을 대상으로 보행수 측정기 착용위치 불변성을 확인하기 위하여 4개 부위(목, 허리, 주머니, 가방)에 2가지 유형의 보행계수기(Yamax Digiwalker, Omron Healthcare)를 착용하고 3단계(4.8km⋅h, 6.4km⋅h, 9.7km⋅h) 보행속도에 모두 교차하여 측정하였다. 일상적 생활환경에서의 보행수 측정의 일치도를 확인하기 위해서는 하루 동안의 총 보행 수를 측정하였다. 연구 결과 전형적인 보행 상황(4.8km⋅h)에서 실제보행수와 보행계수기에 의한 보행 수 측정의 정확성은 선정된 두 기종에 관계없이 매우 높다. 보행 속도가 6.4km⋅h에서는 전체적으로 보행 수를 과대 추정하고 있으며, 속도가 빨라지는 상황에서는 Omron 기종의 측정 오차가 적다. 보행계수기의 측정의 일치도는 달리기 상황을 제외하고 동일 기종 내에서 착용위치에 관계없이 적정수준을 보이고 있다. 보행계수기는 전형적인 보행속도에서는 기종간 또는 착용위치별 측정의 정확이 높지만, 신체활동 중 빠르게 걷거나 뛰는 동작이 포함될 경우 측정의 오차가 증가한다. 신체활동 중재 프로그램 또는 어린이 청소년들의 체육교육 프로그램에서 신체활동의 질적 측면을 고려한 보행계수기 선택이 필요하다.
Abstract
The purpose of this study was to investigate the validity and reliability evidences of the Yamax Digiwalker SW650 and Omron HJ-113 pedometer, which could count steps taken even when worn at difference locations on body and difference step speed. Fifteen female adults(162±4cm, 52.93±8.62kg) were participated in this study after consent was received. Subjests were asked to wear and walked 2 type pedometers in 3 lab based walking conditions(4.8km⋅h, 6.4km⋅h, 9.7km⋅h) and a free living condition. For comparison, they also wore at 8 different locations on body. Among the 3 walking conditions, only 9.7km⋅h walking condition indicated a low agreement between actual count and all other pedometer counts. While the mean difference between the pedometer counts and actual counts were similar during 4.8km⋅h, 6.4km⋅h conditions. Also, percent error was greatest in 9.7km⋅h walking condition. In free living condition, there were high intramodal agreement coefficient. This threat to validity is likely problematic when using the pedometer to assess physical activity in young & diverse pattern individuals who involved physical education & leisure activity.
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