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걷기운동시 보행보수계를 이용한 운동강도 설정

Establishment of Exercise Intensity with Pedometer for Walking

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초록

본 연구는 10대 후반의 성인남녀를 대상으로 걷기운동 중 %HRmax 대비 분당 보수 및 보폭을 알아보기 위하여 점증적 걷기 부하 검사를 실시하였다. 매 2분마다 0.3mph씩 증가하여 도저히 걷을 수 없는 속도까지 검사는 진행되었으며 검사과정 중 매분마다 심박수, 운동자각도, 속도자각도, 보행수, 보폭을 기록하였다. 또한 개인적 특성과 보수 및 보폭간 관계분석을 위하여 개인별 하지장의 길이, 유산소능력, 체지방, BMI를 측정하였으며 결과는 다음과 같다. 첫째, 남녀간 %HRmax별 분당 보행수는 모든 운동강도에서 유의한 차이는 없었다(p<.05). 둘째, 걷기운동 중 보폭은 60%HRmax 이상의 운동강도에서 남자가 여자보다 길게 나타났다(p<.05). 셋째, 남자는 중강도 수준(60%HRmax)의 분당 보행수는 119.50steps/min(±7.75)으로써 최대보폭 대비 85%수준으로 1시간동안 7200steps/hour, 272.4kcal 에너지 소비가 발생되는 것으로 나타났다. 넷째, 여자는 중강도 수준(60%HRmax~70%HRmax)의 분당 보행수는 112.20steps/min(±9.97)~128.40steps/min(±6.95)로써 최대보폭대비 85%이상으로 1시간동안 7218steps/hour, 240kcal의 에너지 소비가 발생되는 것으로 나타났다. 다섯째, 50%HRmax 이상 운동강도 수준에서 남녀의 개인적 특성인 유산소능력, 하지장길이, 체지방, BMI는 보수, 보폭과 유의한 상관성이 없었다(p<.05). 여섯째, 분당 보행수, 보폭길이를 입력식으로 남녀별 심박수 추정식은 다음과 같다. 남자 : HR = -12.304 + (1.016 × 보수) + (0.315 × 보폭) : R2 70.3%, SEE = 15.36. 여자 : HR = 25.150 + (0.979 × 보수) - (0.078 × 보폭) : R2 73.5%, SEE = 15.22. 끝으로 본 연구에 참여한 대상자들은 체지방율이 정상범위에 속하는 청소년들로써, 30분 이상 빠른 속도의 걷기운동에 큰 무리가 없었지만, 체지방율이 높은 수준의 비만 청소년을 대상으로 실시할 경우, 심박수기준의 운동강도보다는 운동자각도에 의한 분당 보행수 및 보폭을 적용한 신체활동량이 더 바람직할 수 있을 것으로 사료된다. 또한 대상자들의 연령을 10대 후반으로 제한하기 때문에, 차 후 초중고등학교 비만학생의 신체강도별 분당 보행수에 대한 연구도 필요할 것으로 생각된다.

Abstract

The purpose of this study was to establish the exercise intensity with pedometer for walking. For the purpose, total 19 teens who composed of 9 boys and 10 girls participated the incremental walking test. We observed several factors including steps/min, length/step, heart rate, walking velocity, RPE, CR10 per 1 minute during maximal walking test. Moreover to predict the heart rate with steps/min, length per step, we performed the regression analysis and the results were as following; ① There was no significant difference between males and females in steps/min during walking. ② As the moderate exercise intensity, steps per minute of 60%HRmax in males was 119.50steps/min with the 85% of maximal stride, which might mean to consume about 272.4kcal/hour which was recommended for health life by Public Health. ③ The other side, in females, steps per minute as moderate exercise intensity was 112.20steps/min with over the 85% of maximal stride, which lead to consume 240kcal/hour. ④ There was no relationship between walking factors and individual characteristics including VO2max, BMI, %fat, the length of lower limb(p<.05). ⑤ The formula for presumption of heart rate was as following; males : HR = -12.304 + (1.016 × steps/min) + (0.315 × stride(cm)) : R2 70.3%, SEE = 15.36. females : HR = 25.150 + (0.979 × steps/min) - (0.078 × stride(cm)) : R2 73.5%, SEE = 15.22.

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