Fig. 2

Correlations and 95% prediction intervals between the three measures in those with and without RER ≥ 1.1. a The correlation between the SF-36 physical functioning scale and the percentage peak VO2, b The correlation between the number of steps/day and the percentage peak VO2 and c shows the correlation between the number of steps/day and the SF-36 physical functioning scale. No significant differences were found in comparing RER < 1.1 and RER ≥ 1.1. Phys Funct SF-36: the physical functioning scale of the SF-36 questionnaire; %peak VO2 of Norm: peak VO2 oxygen uptake relative to controls