Fig. 2

Mediation model and paths in older adults explaining episodic memory performance with age, PA and executive index as predictors. An arrow indicates that the effect of the first variable is mediated by the second variable (indicated by the arrowhead). Main findings: ABC indicates that the effect of age on memory could be predicted by executive functions. DEC indicates that the effect of age on memory could be predicted by PA. The significant indirect pathway (in black) indicates the effect of age on memory could be predicted by executive functions, which itself could be predicted by PA