| You know how your resting heart rate will be higher if you're overtrained?
Can you take our HR in the morning before getting out of bed and decide from that what kind of training to do?
I don't know how sensible HR is, will you be able to detect small enough differences from your resting HR? And I'm sure it will naturally vary some..
Think it could work? or are the problems I mentioned too big/other problems?
I also thought morning temp.. the higher your metabolism the higher the temp.. but I don't know if there is a clear difference between how "overtrained" you are and your metabolism/morning temp. | 
