Question

How regular exercise reduces sympathetic activity and increases parasympathetic activity?

Answer 1

Endurance training increases parasympathetic activity and decreases sympathetic activity in the human heart at rest. ... Long-term endurance training also decreases submaximal exercise heart rate by reducing sympathetic activity to the heart.

Answer 2

Endurance training increase parasympathetic activity in the human heart at rest .
physiological ageing is associated with reduction in parasympathetic control of the heart; this decline in parasympathetic activity can be reduced by regular endurance exercise.