Do you use a heart rate monitor when you train? I guess at most big box gyms the majority of people don't. I mean when you consider that most people don't have a training journal to record their workouts they probably aren't going to go to the trouble and expense of investing in a heart rate monitor. But for those that do have and use a heart rate monitor I'm curious as to what they monitor? Again if I had to guess what number most people check first when they complete a training session I would say it's the calories consumed. And this is kind of amusing because: A. This is simply a rough estimation of correlating calories burned with elevated heart rate. If this is all it took to get lean we could probably just watch marathon horror movies every day to spike our heart rates repeatedly, burn tons of calories, and get lean. B. The estimation is just that. It uses an average and includes the calories burned while at rest. In other words if my body uses 50 calories at rest and 110 calories to go for a hike than the hike only burned 60 calories. But the display on my heart rate monitor would show 110 calories and perhaps give me a false impression of how effective a particular training session was. But other than tracking the calories consumed a heart rate monitor can tell us the duration of our exercise, our average heart rate and our maximal heart rate. Now you can always pick up models with other functions that include lap functions, GPS, elevation and other things but at minimum you'll get heart rate data. So why would I want a heart rate monitor anyway? Can't I simply stop and check my pulse every now-and-again? To answer...