Changes in serum BDNF levels associated with moderate-intensity exercise in healthy young Japanese men.

PURPOSE: The purpose of this study was to examine the influence of acute moderate-intensity exercise on serum brain-derived neurotrophic factor (BDNF) levels in healthy young Japanese men. BDNF is one of a family of neurotrophic factors involved in neuronal transmission, modulation and plasticity. Previous human-based studies have demonstrated that acute exercise leads to increases in BDNF; however, to date there has been no study conducted among Japanese male subjects. METHODS: Forty young adult Japanese men (aged 24.1 ± 2.9 years) - reduced to a total of thirty three following subjection to exclusion criteria - performed 30 minutes of exercise at 60% of VO2max on a stationary bicycle. Serum BDNF was analyzed both before and after exercise. RESULTS: Eighteen of the total thirty three subjects demonstrated an increase in serum BDNF after exercise. However, on aggregate, the change in serum BDNF associated with exercise was not significant (p = .17). CONCLUSIONS: This is the first study to demonstrate that serum BDNF levels are not consistently increased by acute moderate-intensity exercise in Japanese men. It is likely that something in the lifestyle and/or environment of male Japanese subjects underlies the difference between our findings and studies conducted in other countries.