. >> reporter: that's 83-year-old ronald bell, a husband of more than 60 years. making you wonder if the fountain of youth does exist. >> i have crossed the country various directions 19 times, fledged 19 mountains. we did a running race across the death valley. >> reporter: he has participated a race across america six time, riding his bike from the pacific to the atlantic. >> we crossed nine days, 7 hours, 11 minutes. >> reporter: six months later, dr. bell suffered a stroke, but never stopped working out. his secret? >> mental toughness is the ability to see a difficult task without being freaked out. it just, to know you can handle it and thrive with it. >> reporter: for dr. bell, the fountain of youth is a state of mind. >> you can swim against the wave. if you don't have it, you're >> reporter: but it's not about unlocking the key to eternal youth, but embraces a life-style for perpetual at devry university's college of business, we're looking for what the companies you'd want to work for, are looking for: the go-getters. students who want to go places, in the business they're