Medical experts say that good nutrition, sleep and exercise are key to maintaining a healthy and strong immune system as we navigate these tough times with covid-19. With gyms and sports fields and clubs closed across the country, outdoor exercise, which gives us fresh air and helps to cure cabin fever for a bit, is the way to go if we do it smartly and safely. Hiking Last Saturday I needed to get out of the house for a day, not just for a stroll but something more vigorous. I was frustrated because I was supposed to be in southeast Georgia, hunting the spring turkey opener. Covid-19 cancelled that. I picked a moderately strenuous 9-mile section of the Appalachian Trail [...]