The Validity Of Estimating Prediction Of Maximal Oxygen Uptake From Ratings Of Perceived Exertion During A Submaximal Intensity Exercise

Objective:The purpose of the study between the ratings of perceived exertion (RPE) and oxygen uptake (VO2max) for exercise test in22college students is to predict the body’s maximal oxygen uptake (VO2max) and verify the usefulness as well. Which will be helpful to providing theoretical basis for the RPE predicting maximal oxygen uptake (VO2max)Methods:In total22(10men and12women), completed one graded exercise test (GXT) to determine VO2max. A graded exercise test (GXT) was completed after48hours, where the mean VO2and HR values recorded over the final30s of each RPE level were used in the proceeding analysis. Linear regression analysis using the equation VO2=a+b (RPE) was performed on each individual’s sub-maximal production trial to enable predictions of VO2max. All RPE ranges were extrapolated to RPE19(average peak RPE value reported in GXTs) and RPE20(theoretical maximal RPE). At the meantime,Linear regression analyses were also used to provide predictions of VO2max from the submaximal HR values derived at each perceptually-regulated RPE when these were extrapolated to the age-predicted maximal HR(220-age,206.9-0.67*age,HRmaxpred). We picked up three RPE ranges:RPE9,RPE13,RPE15. The VO22max was predicted from two RPE ranges (9-13,9-15). The study confirmed the validity of estimating VO2max from RPE9-13and RPE9-15through the matching T test, simple correlation coefficient, intraclass correlation coefficientand Bland-Altman method analysis.Results:1. There was significant difference among height, weight, VO2max between students of men and women, P<0.001. Theoxygen transportation system functionalityand aerobic exercise ability of man are strong than women.2. There was no significant differences (P>0.05) between directly measured and predicted VO2max from RPE13to RPE20. There wassignificant differences (P<0.05) between directly measured and predicted VO2max from RPE13to RPE19. There was no significant differences (P>0.05) between directly measured and predicted VO2max from RPE15to RPE20. There was no significant differences (P>0.05) between directly measured and predicted VO2max from RPE15to RPE19. There was no significant differences (P>0.05) between directly measured and predicted VO2max from HR9-13(220-age). There was no significant differences (P>0.05) between directly measured and predicted VO2max from HR9-13(206.9-0.67*age) There was no significant differences (P>0.05) between directly measured and predicted VO2max from HR9-15(220-age). There wassignificant differences (P<0.05) between directly measured and predicted VO2max from HR9-15(206.9-0.67*age)3. Through the simple correlation coefficient analysis, there was highly relevant between directly measured and predicted VO2max from RPE13to RPE20. There was highly relevantbetween directly measured and predicted VO2max from RPE13to RPE19. There was highly relevant between directly measured and predicted VO2max from RPE15to RPE20. There was highly relevant between directly measured and predicted VO2max from RPE15to RPE19. There was low relevant between directly measured and predicted VOmax from HR9-13(220-age). There was low relevant between directly measured and predicted VO2max from HR9-13(206.9-0.67*age) There was low relevant between directly measured and predicted VO2max from HR9-15(220-age).There was low relevant between directly measured and predicted VO2max from HR9-15(206.9-0.67*age)4. Through the intraclass correlation coefficient analysis, There was a good consistency (ICC＞0.75) between directly measured and predicted VO2max from RPE13to RPE20. There was a good consistency (ICC＞0.75) between directly measured and predicted VO2max from RPE13to RPE19. There was a good consistency (ICC＞0.75) between directly measured and predicted VO2max from RPE15to RPE20. There was a good consistency (ICC＞0.75) between directly measured and predicted VO2max from RPE15to RPE19. There was a bad consistency (ICC<0.75) between directly measured and predicted VO2max from HR9-13(220-age). There was a bad consistency (ICC＜0.75) between directly measured and predicted VO2max from HR9-13(206.9-0.67*age). There was a bad consistency (ICC＜0.75) between directly measured and predicted VO2max from HR9-15(220-age). There was a bad consistency (ICC<0.75) between directly measured and predicted VO2max from HR9-15(206.9-0.67*age)5. Through the Bland-Altman method analysis, There was a good consistency between directly measured and predicted VO2max from RPE13to RPE20for men,but no good consistency for women or overall. There was a good consistency between directly measured and predicted VO2max from RPE13to RPE19for overall,but no good consistency for men or women. There was a good consistency between directly measured and predicted VO2max from RPE15to RPE20. There was a good consistency between directly measured and predicted VO2max from RPE15to RPE19. There was a good consistency between directly measured and predicted VO2max from HR9-13(220-age) for overall, but no good consistency for men or women. There was a good consistency between directly measured and predicted VO2max from HR9-13(206.9-0.67*age) for women or overall, but no good consistency for men. There was a good consistency between directly measured and predicted VO2max from HR9-15(220-age) for overall or men, but no good consistency for women. There was a good consistency between directly measured and predicted VO2max from HR9-15(206.9-0.67*age) for overall or men, but no good consistency for women.Conclusions:1. There was a better consistency between directly measured and predicted VO2max from RPE9-13(RPE20) than RPE9-13(RPE19). There was a good consistency between directly measured and predicted VO2max from RPE9-13(RPE20).2. There were good consistencies between directly measured and predicted VO2max from RPE9-15(RPE20) and RPE9-15(RPE19),3. There was no good consistencies between directly measured and predicted VC^max from HR9-13(220-age)、HR9-13(206.9-0.67*age). HR9-15(220-age)and HR9-15(206.9-0.67*age)...