I'm a little confused as to which to use, HR or power, for zone training on the bike.
Based on a lowly ftp of say 255, my power zones should be around:
Z1 - < 140 watts
Z2 - 165 watts
Z3 - 205 watts
Z4 - 232 watts
Z5 - 255 watts
With HR, zones for me with a theoretical max HR of 170, would be:
Z1 - 94
Z2 - 110
Z3 - 128
Z4 - 145
Z5 - 162
Issue is, if I push, say, 165 watts (Z2), I find my HR will approach Z4.
If I want my HR to stay down in Z2, I need to be pushing less than Z1 watts.
What am I missing (other than fitness!)?
Based on a lowly ftp of say 255, my power zones should be around:
Z1 - < 140 watts
Z2 - 165 watts
Z3 - 205 watts
Z4 - 232 watts
Z5 - 255 watts
With HR, zones for me with a theoretical max HR of 170, would be:
Z1 - 94
Z2 - 110
Z3 - 128
Z4 - 145
Z5 - 162
Issue is, if I push, say, 165 watts (Z2), I find my HR will approach Z4.
If I want my HR to stay down in Z2, I need to be pushing less than Z1 watts.
What am I missing (other than fitness!)?