Originally Posted by bobby c
"Hi Bob;
For any person, endurance training seems to lower the HRmax a little. <snip>
Rob"
Your observed HRmax will go up and down continually during the training cycle. It will be lower after 3 weeks of Build cycle, for instance. If you then take a couple of weeks off, it will be higher again. Nothing too mysterious there. Hard to know if that's what the doc meant when he stated that endurance training may lower HRmax. It's hard to do this kind of research because there's no funding and it's almost impossible to control for the variables.