New Study Links Fitness Boost to Greater Release of Brain-Boosting Proteins After Exercise
A new study led by a UCL researcher indicates that an increase in physical fitness results in a greater release of brain-boosting proteins following a single exercise session. This improvement leads to enhanced brain function.
The study, published in Brain Research, involved a group of previously inactive participants. They completed a 12-week training program consisting of cycling three times per week. Researchers observed that as participants' fitness levels improved, the amount of brain-derived neurotrophic factor (BDNF) released after exercise also increased.
Understanding Brain-Derived Neurotrophic Factor (BDNF)
BDNF is a crucial brain protein. It is known to support the formation of new neurons and synapses, as well as maintain the health of existing neurons.
Just 15 minutes of moderate to vigorous aerobic exercise is sufficient to release BDNF.
This research is the first to demonstrate that for unfit individuals, 12 weeks of consistent training can enhance the brain's response to a 15-minute workout.
Study Design and Measurements
The study, led by Dr. Flaminia Ronca, included 30 participants. They underwent VO2 max tests every six weeks to assess fitness levels throughout the program.
Before and after VO2 max testing, researchers measured BDNF levels, conducted cognitive and memory tests, and assessed brain activity in the prefrontal cortex.
Key Findings: Fitness Correlates with BDNF Boost
By the final week, participants showed a larger increase in BDNF following intense exercise compared to their response before the program. This increase correlated directly with improvements in their aerobic fitness.
Furthermore, higher BDNF levels and stronger exercise-induced increases were linked to changes in activity across key areas of the prefrontal cortex. These changes were observed during attention and inhibition tasks, indicating improved cognitive function.
Implications for Brain Health
The findings suggest that increased physical fitness can significantly enhance the brain's ability to produce BDNF in response to acute bouts of exercise. This, in turn, positively influences neural activity.
Dr. Ronca stated that while exercise benefits for the brain are established, the specific mechanisms are still being understood. The study highlights that fitness can significantly boost the brain's response to exercise in a relatively short period.