Endurance training enhances BDNF release from the human brain.

Area of Science:

• Neuroscience
• Exercise Physiology
• Molecular Biology

Background:

• Reduced circulating brain-derived neurotrophic factor (BDNF) is linked to major depression and type-2 diabetes.
• Acute exercise is known to increase BDNF production in brain regions like the hippocampus and cerebral cortex.

Purpose of the Study:

• To investigate if endurance training enhances BDNF release from the human brain.
• To examine the effects of endurance training on BDNF mRNA expression in mouse brain regions.

Main Methods:

• A randomized controlled study involving 12 healthy sedentary males undergoing 3 months of endurance training or serving as controls.
• Blood samples were collected at rest and during exercise before and after the intervention to measure BDNF release.
• Mice underwent a 5-week treadmill running protocol to assess BDNF mRNA expression in the hippocampus and cerebral cortex.

Main Results:

• Endurance training significantly increased the resting release of BDNF from the human brain (P < 0.05).
• No significant increase in BDNF release was observed during exercise following training.
• Treadmill running increased BDNF mRNA expression in the mouse hippocampus but not the cerebral cortex.

Conclusions:

• Endurance training enhances resting BDNF release from the human brain.
• Endurance training increases BDNF expression in the hippocampus, suggesting a mechanism for promoting brain health.
• These findings indicate that endurance exercise positively impacts brain health, potentially offering benefits for neurological conditions.