Abstract
Brain-derived neurotrophic factor (BDNF) has been considered an essential mediator
responsible for the beneficial effects of physical activity in preventing cognitive
impairment. This study aimed at examining the effects of a single bout of neuromuscular
electrical stimulation (NMES) on levels of BDNF in the plasma and on cognitive performance
in healthy adult men. Thirteen healthy adult men participated in three experimental
sessions. The first session was 30 min of NMES to both legs, the second was 30 min
of cycling exercise at the intensity of 60% peak oxygen uptake, and the third was
30 min of complete rest. Blood was examined for plasma BDNF levels and glucose concentrations,
and cognitive performance tests were performed before and after each session. A single
bout of NMES significantly increased plasma BDNF levels (p<0.05), which were equivalent
to the amount of plasma BDNF released during the exercise session (p>0.05). However,
there were no significant changes in cognitive performance between the sessions (p>0.05).
The present study found that a single bout of NMES significantly increased plasma
BDNF to levels normally present during moderate voluntary exercise. Therefore, NMES
could serve as an alternative method of exercise, and might shed light on individuals
for whom voluntary physical exercise is contraindicated.
Key words
Electrical muscle stimulation - physical activity - cognitive function - dementia