Exercise-Induced Neuroplasticity and Emotional Regulation

Exercise stimulates structural and functional adaptations within the central nervous system that underpin changes in emotion and mood. Physical activity drives neuroplastic processes across multiple levels, from molecular cascades to circuit remodelling, culminating in enhanced synaptic efficacy, hippocampal neurogenesis and modulation of stress circuits. These adaptations converge on neural networks governing emotional regulation—most notably the hippocampus, amygdala and prefrontal cortex—promoting resilience to stress and anxiety. Mechanistically, exercise elevates neurotrophic factors, optimises neurotransmitter balance (including serotonergic and dopaminergic systems) and fine-tunes inflammatory pathways. Emerging evidence emphasises sex-specific and region-specific responses, underscoring the need for personalised exercise prescriptions. Collectively, this body of work positions exercise as a potent non-pharmacological intervention to maintain mental health, with broad implications for global public health strategies.

Research from Nature Portfolio

Seminal research has revealed sex-dependent mechanisms by which exercise modulates mood homeostasis. In rodent models, activation of oestrogen receptors in cerebral endothelium was shown to increase uptake of circulating insulin-like growth factor I into the hippocampus exclusively in females, whereas males displayed distinct neuroendocrine adaptations. This blood-brain axis underlies differential anxiolytic and stress-resilience effects between sexes, demonstrating that the interplay of oestradiol and IGF-I signalling is a critical determinant of exercise-induced emotional regulation. Such findings inform the development of tailored interventions that account for hormonal and growth-factor dynamics.

Exercise-Induced Neuroplasticity and Emotional Regulation publication trend

The graph below shows the total number of articles in exercise-induced neuroplasticity and emotional regulation across all publications each year (not limited to Nature Index journals).

Technical terms

Neuroplasticity: The ability of neural circuits to adapt structurally and functionally in response to experience or injury.

Brain-derived neurotrophic factor (BDNF): A protein that supports neuronal growth, differentiation and synaptic plasticity.

Hippocampal neurogenesis: Formation of new granule neurons in the dentate gyrus, contributing to learning, memory and mood regulation.

5-HT2C receptor: A subtype of serotonin receptor involved in the modulation of anxiety and stress responses.

Insulin-like growth factor I (IGF-I): A hormone with neurotrophic properties influencing neuronal growth, survival and synaptic function.

Stress resilience: The capacity of an organism to adapt to and recover from stressful stimuli without developing maladaptive emotional responses.

References

1. Exercise reduces the anxiogenic effects of meta-chlorophenylpiperazine: The role of 5-HT2C receptors in the bed nucleus of the stria terminalis. Frontiers in Synaptic Neuroscience (2023).
2. Running Reduces Uncontrollable Stress-Evoked Serotonin and Potentiates Stress-Evoked Dopamine Concentrations in the Rat Dorsal Striatum. PLOS ONE (2015).
3. A Concerted Action Of Estradiol And Insulin Like Growth Factor I Underlies Sex Differences In Mood Regulation By Exercise. Scientific Reports (2016).
4. Immune and Neuroprotective Effects of Physical Activity on the Brain in Depression. Frontiers in Neuroscience (2018).
5. Running from Stress: Neurobiological Mechanisms of Exercise-Induced Stress Resilience. International Journal of Molecular Sciences (2022).