Physical activity linked to improved brain health and BDNF levels

Recent research highlights the connection between physical activity and brain health, specifically regarding brain-derived neurotrophic factor (BDNF) and white matter integrity.

A Bayesian network meta-analysis of 47 randomized controlled trials involving 1,815 adults over age 60 found that aquatic exercise was associated with the largest estimated increase in BDNF, a protein essential for neuron survival and synaptic plasticity. However, researchers cautioned that these findings are based on only two studies and require confirmation through larger trials before aquatic exercise can be definitively ranked as the optimal method for brain health.

Separately, data from the Rhineland Study in Germany, involving 4,188 participants, examined how accelerometer-based physical activity affects brain white matter integrity. The study found that higher energy expenditure was related to lower orientation dispersion, though the association tended to level off at higher levels of activity. The research suggests that the effects of physical activity on the brain are dependent on region, dose, and age.