I do not have any experience with heart rate monitors. Using them and experimenting with them makes perfect sense as it gives the athlete a visual piece of information to support things we already know for sure. T –Slow and Estee and a few others here have been doing interesting work and can expand on this section. T slow shared a great deal of data with me showing his research supports many ideas of working high one day and low the other and waiting for the body to be ready for more high intensity work.