Decreased Exercise-Induced Changes in Prefrontal Cortex Hemodynamics Are Associated With Depressive Symptoms

Area of Science:

• Neuroscience
• Cognitive Psychology
• Exercise Physiology

Background:

• Depressed mood is linked to impaired executive function and reduced prefrontal cortex (PFC) activity.
• Physical activity and cognitive training show potential for improving these cognitive deficits.

Purpose of the Study:

• To investigate how acute exercise affects PFC activation during executive function tasks in relation to depressive symptoms.
• To explore the relationship between aerobic fitness and PFC activation changes post-exercise.

Main Methods:

• 106 participants underwent a cardiopulmonary exercise test (CPET) and executive function tests before and after exercise.
• Brain activity in the PFC was assessed during executive function tasks.
• Depressive symptoms and aerobic fitness (VO2peak) were measured.

Main Results:

• Acute exercise induced bilateral PFC activation changes, most notably in the rostral PFC (BA10).
• Reduced PFC activation changes were observed in individuals with higher depressive symptoms.
• Higher aerobic fitness predicted greater activation changes in the right rostral PFC (BA10).

Conclusions:

• Acute exercise may enhance executive functions by modulating PFC activity.
• The benefits of exercise on PFC activation during cognitive tasks may be influenced by depressive symptom severity and aerobic fitness.
• Physical activity could be a valuable intervention to support executive functions often impaired in depression.