Prediction of academic outcomes by serum cortisol, perceived academic stress, perceived memory performance, and physical activity among preclinical undergraduate medical students: a short-term observational study.

Although poorer perceived memory performance tended to be associated with lower PA levels and higher cortisol tertile (3rd tertile), this association did not reach statistical significance ( p for trend = 0.465, η 2 = 0.00) (Fig. 2 b).

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