I appreciate everyone's advice about mats. I wear new balance shoes and use the mat but frankly 20 hours a week is plenty for me anyway. I mainly enjoy the ride in, the ride home and talking to the staff. Last summer we did a few sub24 overnighters. Cool bonding. You havnt lived as a 60 something until you have smoked contraband at a campground with young cyclists. Not something id do normally but hey....