A comparative study of maximal oxygen consumption (VO2max) determined by two sub-maximal exercise tests

Authors : Mohd Yusuf, R B. Kamal, Manish Bajpai, Kavita Chawla, Piyush Saxena

DOI : 10.18231/2394-2126.2018.0118

Volume : 5

Issue : 4

Year : 0

Page No : 515-518

Aim: The aim of the study was to compare the predictive values of VO₂max determined by two sub-maximal exercise tests: Bruce sub-maximal exercise test and Treadmill jogging test and to find correlation between these two tests.
Materials and Methods: One hundred twenty five apparently healthy male subjects 18-25 years underwent first three stages of the original Bruce protocol in one session and exercise according to Treadmill jogging test in another session in randomised order. VO₂max was calculated by using appropriate regression equation.
Results: VO₂max values from two tests (t test) revealed similar mean values of VO₂max between the two tests (47.06 ± 2.74 vs. 47.20 ± 2.27, t=0.64; p=0.649) i.e. not differed statistically. Concordance correlation coefficient showed an insignificant (p>0.05) concordance between the two tests (r=0.020, 95% CI=-0.152 to 0.191) with low precision (p=0.021) but with high bias correction factor (Cb=0.98).
Conclusion: In conclusion we can say that these two tests are comparable in terms of mean values of VO₂max. Poor correlation coefficient between the two tests should be subjected to further study with subjects having wider age range and wide range in VO₂max values.

Keywords: VO₂max, Sub-maximal exercise, Treadmill test, Physical fitness.

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