Evaluation and Development of Non-Exercise Prediction Models of Maximal Oxygen Consumption in Azerbaijan-Iranian Young Men
Keywords:New Equation, VO2max, Perceived Functional Ability, Physical Activity
LANGUAGE NOTE | Document text in English; abstract also in Chinese.
The purpose of this study was to develop a regression equation to predict maximal oxygen consumption (VO2max) based on non-exercise (N-EX) data and to investigate the validity of these equations in healthy young men. One hundred healthy men (age: 18-26 years) were randomly separated in two equal groups (n=50). All participants, successfully completed a maximal graded exercise test (GXT) to assess VO2max (Mean = 45.56 ml × kg-1 × min-1, SD = 4.14). The N-EX data collected just before the maximal GXT including participants’ age; body mass index (BMI); perceived functional ability (PFA) to walk, jog, or run given distances; and current physical activity (PA-R) level. Methodological differences among these methods (new equation and GXT in the validation group) were analyzed with Bland-Altman (1986) method. A good correlation coefficients were observed between VO2max and body mass index (BMI) (r = -0.50), PFA (r = 0.71) and PA-R (r = 0.70) in the development group (p< 0.05). Multiple linear regression generated the following N-EX prediction equation: VO2max (ml × kg-1 × min-1) = 47.718 – (0.38516 × BMI) + (0.8541 × PA-R) + (0.2539 × PFA). When new VO2max prediction equation were applied to the validation group, high agreement were also observed between measured VO2max by GXT and predicted VO2max (mean±SD: 0.58±2.53) (p< 0.05). This study provided an N-EX regression model that yields relatively accurate results and it is a convenient way to predict VO2max in Azerbaijan–Iranian young men with a similar cardiorespiratory fitness level. Authors recommend further studies to elucidate generality of the new equation.
本研究旨在計算預測年青人最大攝氧量的公式，邀請了100位健康男士，分成兩組進行測驗。結果顯示，推算最大攝氧量的公式如下: VO2max (ml × kg-1 × min-1) = 47.718 – (0.38516 × BMI) + (0.8541 × PA-R) + (0.2539 × PFA) 。
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