Fat max ride on the calendar this week. The description recommends being careful to avoid Z3, and stay in high Z2 for the fat max intervals. I thought that gas exchange studies show that the maximum fat oxidation rate is low Z3 for most people. Is that correct? Are you just concerned about the extra fatigue with Z3? Maybe the rationale is to have the legs a little fresher to push the next VO2 session? Maybe we hit the slightly higher zone in the block where we are focused on it? I’m not implying anything is wrong, just curious.