"The last couple of years have been so difficult for everybody," said 32-year-old Chris Vetter of Port Washington, New York, who has struggled with anxiety since he was in high school.Vetter raised money for Still I Run, a nonprofit running community that works to promote the benefits of running for mental health.Exercise in general and running in particular have long been linked with positive health benefits."Sometimes you're running downhill and you can't stop your legs and everything's kind of snowballing downhill," he said."It feels amazing but the job's not done ... this is only the beginning just for my own personal journey and I want to continue on that mission," Vetter said."