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한국 노인의 2분 걷기 타당도 확인 및 최대산소섭취량 추정식 개발

Validation of Two-Minute Step Test and Development of VO2max Prediction Equation in Older Korean Adults

박소영|임정준|이온
국민체육진흥공단 한국스포츠과학원 (Korea Institute of Sport Science)|2023.09|체육과학연구 (Korean Journal of Sport Science)|제34권 제3호|pp. 374-381

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참고문헌

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Older adultsvalidation타당도최대산소섭취량VO2max추정식노인 2분 걷기Two-minute step testPrediction equation
주제분류체육

초록

[목적] 본 연구는 한국 노인 대상의 2분 걷기 준거타당도를 확인하고, 최대산소섭취량 추정식을 개발한 후 교차타당도를 검증하는 데 있다. [방법] 65세 이상 노인 150명 (남자 74명, 여자 74명)을 대상으로 최대하 운동부하검사와 2분 걷기를 실시한 후 상관분석을 수행하여 준거타당도를 확인하였다. 다중회귀분석을 통해 최대산소섭취량 추정식을 개발하였으며, 최대산소섭취량의 측정값과 예측값 간의 상관분석을 수행하여 교차타당도를 확인하였다. [결과] 최대산소섭취량과 2분 걷기 간의 상관계수는 0.457 (p <.001)로 유의하게 나타났다. 개발된 최대산소섭취량 추정식의 Adjusted R2는 0.430 (p <.001)으로 유의하게 나타났으며, 최종적으로 선택된 설명변수는 성, 연령, 2분 걷기횟수, 체지방률이었다. 측정한 최대산소섭취량 (19.08±4.36)과 추정식으로 예측된 최대산소섭취량 (19.73±3.36) 간의 상관계수는 0.654 (p <.001)로 유의하게 나타났다. [결론] 본 연구를 통해 한국 노인을 대상으로 2분 걷기의 준거타당도가 검증되었으며, 개발한 최대산소섭취량 추정식의 교차타당도가 검증되었다. 추정식의 설명변수는 현장에서 적용하기에 용이할 것이라 판단되며, 더 많은 수의 인원을 대상으로 개발된 추정식의 타당도 검증이 이루어진다면 보다 의미 있는 결과가 도출될 것이다

Abstract

PURPOSE This study aimed to verify the criterion validity of the two-minute step test in older Korean adults, develop an equation for predicting VO2max, and verify cross-validation. METHODS A submaximal exercise test and the two-minute walk test were performed on 150 older adults (74 males and 74 females) aged 65 years or older. Correlation analysis was performed to confirm criterion validity. An equation for estimating VO2max was developed through multiple regression analysis, and crossvalidation was confirmed by performing a correlation analysis between measured and predicted values of VO2max. RESULTS The correlation coefficient between VO2max and the two-minute step test was 0.457 (p<.001). The adjusted R2 of the developed VO2max prediction equation was 0.430 (p<.001), and the explanatory variables finally selected were sex, age, number of steps in the two-minute step test, and percentage of body fat. The correlation coefficient between the measured VO2max (19.08±4.36) and the predicted VO2max (19.73±3.36) was 0.654 (p<.001). CONCLUSIONS This study confirmed the criterion validity of the two-minute step test in older Korean adults, and the cross-validation of the developed VO2max prediction formula was verified. The explanatory variables of the prediction equation will be easy to apply in the field, and more meaningful results will be derived if the validity of the prediction equation developed for a larger number of participants is verified.

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