glen miller who is getting off of an 800-mile drive from texas.nt to see if he is ready for a big triathlon which is a month away. i'm a marathon runner, in absolute perfect physical condition and i had a heart attack right out of the clear blue... i'm on an aspirin regimen... and i take bayer chewables. [ male announcer ] be sure to talk to your doctor before you begin an aspirin regimen. he's my success story. [ laughs ] >>> you know, he drives more than 3,000 a week in his truck, so when glenn keller submitted his video to the fit nation challenge, we weren't so sure he could fit exercise into the hectic schedule. but this week, he steered the truck to cnn to give us an update on how he is keeping up. >> reporter: hey, how are you? your home away from home. >> the command center. >> you get to take a ride in this? >> yes, sir. you do. >> reporter: i have to ask, how are you doing with the training? >> well, we have been doing p t pretty good, because in spite of the schedule recently i had a chance to set up with something with a pool in baltim