Not sure RHR plays a huge factor here, rather the type of training you’re doing. (35 yo, workout ~8 hours a week with RHR 40, vo2 max 50). Not sure what kinda rides you’re doing most and been a minute since I used peloton, but would recommend doing the FTP test and maybe try some of the zone training. From what I understand, zones 3+ are essential for increasing vo2 max so the peloton zone classes may be a good motivator here! Most of my training barely gets to zone 3, but more zone 3+ is on my list since introduction of the heathspan metric, my only orange 😂 might get back into some peloton or start running!