I did two notable things in 2025 that "worked" for me. One was a diet/lifestyle change, the other was bike setup.
I've never been all that much of a drinker, rarely having alcohol during the work week, but I certainly have enjoyed some whisky before dinner on the weekends, and a beer with that dinner. In recent years, though, it became more and more apparent that any alcohol intake was messing with my sleep, and sometimes leaving me feeling after effects the following day. 2024 saw me cutting down, and the first half of 2025 even more so. I haven't had a drink since mid-June 2025, and expect that will likely mark the end of my drinking days.
And I moved to 165mm cranks on the mountain bike in October 2025. I shouldn't have waited so long to do it.
One marked gain has been in bike handling. I moved from 175mm to 165mm, and moving my feet 2cm closer together, toward my center of gravity, is an eye-opener. The bike feels smaller and more reactive under me. Better in every aspect of bike handling.
I certainly feel the loss of leverage in low-speed, high-effort situations (climbing), but I've largely been able to just focus on increasing cadence (where I can also feel the advantage of the shorter levers). Many miles on the road and lots of fixed-gear time over the years definitely are a help in my case.
I didn't change my chainring to less teeth, which often gets mentioned in tandem with the move to shorter cranks. And I did raise my saddle 1cm.