The bigger and much more popular the website is, the greater, and also the higher the PR will probably be. A heart rate monitor not only lets you know how hard you are working, but most models will measure your "time in range" to let you know exactly how many minutes you can count as exercise. While giving presentations may be stressful and nerve-wracking, you can relieve some of this stress by being prepared and relaxing. This is exactly what the developers of Android app have for today.