Validity of Reporting Oxygen Uptake Efficiency Slope from Submaximal Exercise Using Respiratory Exchange Ratio as Secondary Criterion

Figure 2

OUES values reported from exercise intensity defined by RER with associated correlation and relative error compared to full test data. Mean values are reported with standard error bars. (a) presents mean values of OUES generated from data associated with increasing RER. (b) presents the 𝑅 value from Pearson Correlation comparing submaximal RER-defined exercise data with complete data. (c) shows the root mean squared error (RMSE) from the regression of the submaximal RER data versus complete exercise data. RMSE is presented as a value of the relative error reporting submaximal values as opposed to values from full test data.

(a) Mean OUES from exercise data limited by RER criteria

(b) Correlation between OUES defined by RER criteria

(c) Relative error reporting OUES defined by RER criteria compared to full data