I need a little help with using target heart rates for a couple of scenarios. First, during the main riding season on group and other higher effort rides. How do I calculate a general heart rate zone that I could set to let me know when I am going into a state where my body is using its glycogen stores? I am hoping this would help me know how to conserve energy on these rides and when certain efforts are debiting my energy account. I have heard of lactate acid thresholds and don't know if this info is needed to answer my question; however, for now all I have to work with is heart rate info. Second, I have been advised to set a high limit of 65% for recovery or base mile rides in the off season. Any thoughts on heart rate for recovery ride hear rates and heart rate zones for extended base mile or weight loss riding? Please forgive in advance any ignorance of the right terminology. I look forward to any insight from the folks on the board who can help me meet some of my riding goals.