I have recently switched up my training from basically all my rides being hard (zone 5) to the polarized method. For the past 2 months I have been riding slow, zone 2 (<135 bpm) for all but a few rides. I want to learn how to train is this way, but incorporate my FTP number? I went outdoors this weekend, and riding at my old pace (155-163 bpm) is at the top of zone 5 for me, but feels easier/better than my zone 2 workout. My goal is racing, hoping you guys have some insight into how I can reach my potential with this method.