I definitely think breath work can help. I am also a big advocate for having an outlet for stress. Whether that be working out, playing sports, playing music. Personally I found that the best I ever managed stress was when I played in a band and we jammed for a couple hours, twice a week. Letting anything that was burdening you, weighing on you, flow through and out with the music is a great stress reliever. I think working out and playing sports routinely can be similar outlets for people.