For me cycling is a sport, a hobby and an obsession that I do every day. But M-W-F I also run a couple of miles so when I'm on vacation without my bike I can still get a workout, plus it's good to do some weight bearing cardio. And on T-T I work out with some weights. Core exercises are done every weekday. Bone density & overall general health are things to consider beyond a new PB on the bike. And I've managed to have a number of PBs this year too.