Everyone has their routines that work for them. :thumbsup:
Cardio begets cardio for me although I add in HIIT strength training at least once or twice a week has helped a bunch. Bursitis flared up a couple days ago... Freaking arm just goes dead so I'm laying off the weights a few days. Body weight only, lot lot lot of stretching and flexibility work.
Edit to add:
When I first got the bike... the App has you do a fitness challenge for like 15 minutes. Kicked my arse... on a 1-100 setting I was top-end at about a 25 @ 60 RPM Now steady cruise is 40 and 80 RPM rolling an hour or more.