Figure 4. Association between maximal fat oxidation (MFO) (A, B), and the intensity of exercise that elicits MFO (Fatmax) (C) with age. β (unstandardized regression coefficient), R2 and P are from a simple linear regression analysis. Abbreviations: MFO; Maximal Fat Oxidation, MFOLM; Maximal Fat Oxidation relative to lean mass, Fatmax; Intensity of exercise that elicits MFO, VO2max; Maximal Oxygen Uptake.