I'm sure you have heard the term work smarter, not harder. Why would you want to overdo your cardio when working in a lower zone is the key to achieving your goal? It will make your life a lot easier - and push you to your fitness dreams faster. It will also help when you hit a fitness plateau and your body is not progressing the way you want it to. When you use a monitor, you know you are training at the correct intensity. You know you're not over-training or under-training your body. In other words, you will see better and faster results, pushing your motivation through the roof! You'll know you're on your way to being the best you possible.
Are you into weight lifting? If you are doing an aerobic/muscle workout like Crossfit, using one ensures you're working at your desired intensity. If your workout has a recovery time, you can see how much your heart rate lowers while you are resting - a very important thing of which to keep track.
So how do you best utilize a monitor?
To calculate your MHR:
1. Take 220 and subtract your age. Example: 220 - 40 years old = 180
2. Determine your goal. Example: You want to lose weight. To calculate your bpm (beats per minute) range, you should be at 60 - 70% of your MHR (the zone in which you lose weight). Take your maximum heart rate (180 from the example) and multiply 60 - 70%: 180 x 60-70% = 108 - 126
In order to lose weight, you know that your heart rate must not fall below 108 and should not go above 126.