During the two days of the study, the men were each fitted with high-tech hairnets containing multiple sensors that could read electrical activity in the brain. Next, researchers flashed a series of slides across viewing screens set up in front of each young man. The slides, intended to induce anger, depicted upsetting events like Ku Klux Klan rallies and children under fire from soldiers, which were interspersed with more pleasant images. Electrical activity in the men’s brains indicated that they were growing angry during the display. For confirmation, they described to researchers how angry they felt, using a numerical scale from 0 to 9.
The results showed that when the volunteers hadn’t exercised, their second viewing of the slides aroused significantly more anger than the first. After exercise, conversely, the men’s anger reached a plateau. They still became upset during the slide show — exercise didn’t inure them to what they saw — but the exercise allowed them to end the session no angrier than they began it.
What the results of the study suggest is that “exercise, even a single bout of it, can have a robust prophylactic effect” against the buildup of anger, said Nathaniel Thom, a stress physiologist who was the study’s lead researcher.
I've talked about how anger is related to panic and depression . I've talked about how exercise can lessen panic and anxiety . So it's only natural I'd point out that exercise may moderate anger . From the link