Aerobic exercise increases brain-derived neurotrophic factor (BDNF) in sub-acute stroke: a randomized controlled...

Area of Science:

• Neuroscience
• Exercise Physiology
• Rehabilitation Medicine

Background:

• Brain-derived neurotrophic factor (BDNF) is crucial for neuronal survival, plasticity, and outgrowth.
• Aerobic exercise is known to stimulate BDNF release.
• BDNF may play a significant role in maximizing recovery after stroke.

Purpose of the Study:

• To investigate the effect of a moderate-to-high-intensity aerobic exercise program on serum BDNF concentrations.
• To compare BDNF levels in subacute stroke survivors undergoing aerobic exercise versus usual care.

Main Methods:

• A randomized controlled trial (RCT) involving 67 subacute stroke survivors.
• Participants were assigned to either usual care or usual care plus an 8-week moderate-to-high intensity aerobic exercise program (treadmill walking).
• Serum BDNF levels were measured at baseline, 8 weeks, and 26 weeks.

Main Results:

• A significant between-group difference in BDNF levels was observed across the three time points (p=0.048).
• The exercise group showed an 18% increase in BDNF from baseline to 8 weeks (p=0.020), returning to baseline by 26 weeks.
• The control group exhibited no significant changes in BDNF levels throughout the study.

Conclusions:

• Aerobic exercise intervention led to a short-term increase in BDNF concentrations in subacute stroke survivors.
• The findings suggest that exercise-induced BDNF elevation could be a neurobiological mechanism contributing to stroke recovery.
• Further research is warranted to explore the long-term implications and optimal exercise protocols.