The interrelation between aerobic exercise, mental well-being, stress response and epigenetics

Abstract

Mental well-being is a subjective, adaptive state of mind arising from complex dynamic interactions between cognitive, emotional and psychosocial factors. Positive mental well-being may promote good physical health, occupational functioning and academic achievement. In the moderate-to-vigorous intensity of aerobic range, regular cardiorespiratory exercise of sufficient duration and frequency has the capacity to boost resources of mental energy, to improve sleep, mental alertness and social interactions, to buffer maladaptive upregulated emotional responses to psychosocial stressors, to decrease anxiety, to moderate depressive symptoms and to support or even improve cognitive functioning.

Epigenetic modification is a biological mechanism by which environmental factors influence cellular phenotype and function. Psychosocial stressors, and regular performance of aerobic exercise have opposite effects on the central nervous system, mediated at least in part through epigenetic modifications that reprogram the expression of relevant genes.

Generally, physically active persons are more resilient to stress and experience fewer depressive symptoms than do physically inactive persons; and, indeed, regular moderate to strenuous aerobic activity has a mood-enhancing effect and has been proven to mitigate negative affectivity stress responses.

The purpose of this narrative review is to discuss the mechanisms that appear to play a role in aerobic exercise-induced improvement in mental well-being.