Exercise moderates stress risk

It compared the impact of both moderate intensity cycling and quiet rest on the anxiety levels of 37 healthy university students.

Initially, both exercise and rest were equally effective at reducing anxiety level. However, after being exposed to emotionally stimulating images for 20 minutes, anxiety levels increased among participants who rested first. Those participants who exercised first had reduced anxiety levels even after emotional stimulation.
Med Sci Sports Exerc; online 14 Aug