Association between Modified Shuttle Walk Test and cardiorespiratory fitness in overweight/obese adults with primary hypertension: EXERDIET-HTA study

The correlation between measured and predicted V˙O2peak for Singh et al equation was moderate (r = 0.60, P < .001) with a standard error of the estimate (SEE) of 4.92 mL·kg−1 minute−1, SEE% = 21%. The correlation between MSWT and measured V˙O2peak as well as for the new equation was strong (r = 0.72, P < .001) with a SEE of 4.35 mL·kg−1 minute−1, SEE% = 19%. These results indicate that MSWT does not accurately predict functional capacity in overweight/obese people with HTN and questions the validity of using this test to evaluate exercise intolerance. A more accurate determination from a new equation in the current study incorporating more variables from MSWT to estimate V˙O2peak has been performed but still results in substantial error.