Therefore , knocking down the higher cadence by 10 rpm 's saves your cardiovascular system the extra energy , otherwise you 'd tire out too quickly .
Chances are you 're operating at 75 - 80 % + of your VO2max and it is n't easy .
Knocking down the higher cadence by 10 rpm 's saves your cardiovascular system the extra energy , otherwise you 'd tire out too quickly .
Chances are you 're operating at 75 - 80 % + of your VO2max and it is n't easy .