When you ride the trainer or the rollers, how do you configure the intensity of your workout? I've been doing a gradual buildup to max resistance over the first half of the session, and intervals the second, with maybe 5-minute warmup and cooldown periods. I think I got this general idea from an exercise bike I used to use at the gym in college. I move through about five cogs on the bike for the warmup and cooldowns, and use the 7 resistance settings on the trainer for the bulk of the workout. When I'm out on the bike I'm riding for the fun of it and the exercise is an added bonus. But for maximizing the impact of an indoor workout I see how an HRM would be helpful. I feel like I've managed to continue losing weight at much the same rate as when I was riding regularly, so I guess whatever I'm doing is working. Actually I have all the data I would need to confirm this. Engineers love data, y'know.