Share 'Is XX% always the same heart rate?'

Hi, I'm using the 36 week plan for IMMOO '09, I am curious about the use of a single max rate for the determination of target training heart rates independent of the discipline. I have previous read that aerobic/lactate threshold levels for each discipline is likely different (due to various muscular and aerobic efficiencies that one individual might have in one sport but not the other), and ther…