DEVELOPMENT OF PREDICTION EQUATIONS FOR CARDIORESPIRATORY FITNESS USING RATINGS OF PERCEIVED EXERTION IN JAPANESE MEN AND WOMEN / 体力科学

ABSTRACT

A study was conducted to develop prediction equations for cardiorespiratory fitness (maximal oxygen uptake : VO<SUB>2max</SUB> and oxygen uptake at anaerobic threshold : VO<SUB>2AT</SUB>) in Japanese adult men and women. Eighty-three healthy men and 86 healthy women, aged 20-64 years (41.1±13.5 and 41.5±13.5, respectively), were recruited as subjects. Mean (±SD) of VO<SUB>2max</SUB> and VO<SUB>2AT</SUB> measured during a cycling test were 37.2±6.4 and 20.5±4.7 ml/kg/min, respectively, in men and 32.7±7.3 and 17.8±4.1 ml/kg/min, respectively, in women. In this study 36 kinds of equations applicable to each sex were developed using all the subjects (n=169) . These equations consisted of independent variables such as work rate divided by body weight (W/Wt), age and body fat percentage (%Fat), which were signficantly correlated with measured VO<SUB>2max</SUB> and VO<SUB>2AT</SUB>. Multiple correlation coefficients (R) and standard errors of estimate (SEE) of the equations ranged from 0.641 to 0.830 (<I>P</I><0.05) and from 3.66 to 4.98 ml/kg/min, respectively, for VO<SUB>2max</SUB> and from 0.661 to 0.815 (<I>P</I><0.05) and from 2.77 to 3.20 ml/kg/min, respectively, for VO<SUB>2AT</SUB>. Reliability coefficients (r) between the first and second tests were 0.911 in men and 0.873 in women for VO<SUB>2max</SUB>, and 0.869 in men and 0.770 in women for VO<SUB>2AT</SUB>, all of which were statistically significant (<I>P</I><0.05) . It is concluded that the equations developed in the present study have the merits of simplicity, economy, accuracy and reliability. Furthermore, from the viewpoint of safety and convenience, the following prediction equations are recommended.<BR>(Male)<BR>VO<SUB>2max</SUB> (ml/kg/min) =6.57 W<SUB>RPE-legs 15</SUB>/Wt-0.19 Age-0.36%Fat+41.29<BR>(R=0.830, SEE=3.66 ml/kg/min)<BR>VO<SUB>2AT</SUB> (ml/kg/min) =7.35 W<SUB>RPE-legs 14</SUB>/Wt-0.06Age-0.23%Fat+15.62<BR>(R=0.815, SEE=2.77 ml/kg/min)<BR>(Female)<BR>VO<SUB>2max</SUB> (ml/kg/min) =7.30 W<SUB>RPE-legs 15</SUB>/Wt-0.12 Age-0.46%Fat+37.32<BR>(R=0.828, SEE =4.16 ml/kg/min)<BR>VO<SUB>2AT</SUB> (ml/kg/min) =5.03 W<SUB>RPE-legs 14</SUB>/Wt-0.01 Age-0.16%Fat+14.15<BR>(R=0.680, SEE=3.06 ml/kg/min)