Many people are into running, cycling, triathlon and other endurance events. It's surprising with how much is invested into these sports both in terms of time and money that more people don't use heart rate monitors.Why is using a heart monitor such a great idea? Well it for starters it allows the user to get better results in less time. It makes training more efficient and safer.[caption id="attachment_4325" align="aligncenter" width="300"] How far would you drive without any feedback?Consider owning a high performance sports car such as a Ferrari.  You only drive this car in the summer and only on certain roads. It never sees the rain or snow. If you have to park you are that jerk that takes up two spots to give a large buffer. Servicing is done by the only person within 100 miles that works exclusively on Ferraris. It only takes premium fuel and you make sure to log and note everything about this awesome machine.Now let's say you plan to take your Ferrari out onto the highway for a few hours to have some fun. You want to test out the handling, the acceleration, how it climbs and most importantly to feel the top end speed.Only one problem...none of your gauges are working. While you can start and turn the car on all of the needles for every gauge are buried to the left. So you can't read the speed, temperature, tachometer...nothing works.Are you still going out for that drive with no feedback on how the car is performing? Probably not. I'm guessing some people might even call for a flat bed tow truck as to not risk doing any damage to the vehicle while out on the drive.But guess what? You are way more valuable and rare than a Ferrari. In a lifetime you could own...