When most runners, whether recreational athletes or ultra-marathon masters, talk about runner’s high, they usually say something like:
“Effortless running ... Your head is completely free from thoughts.”
“You’re literally running by yourself and enjoy every moment of the activity.”
“It’s too bad that happy feeling doesn't last forever.”
“My run was really easy once I got into that euphoric state.”
So, it feels good. But is it a tingling sensation? A state of mental clarity? Maybe even inner peace? The reward while running is like a rush – a feeling of pure euphoria. A runner’s high releases new energy reserves. The intensity and duration of the high can't be measured precisely and depend on the situation and type of runner.