For the last year or so I’ve been using my garmin 1040 to control the resistance on my trainer during my TrainerRoad rides. I do a lot of free rides so this makes sense. I also use a Zwift cog so can’t control via shifting gears.
It’s always has reasonably close (close enough) jumps between resistance modes. -1 would usually be low to mid Z2 at comfortable cadence with shorter VO2 efforts being around a 1-2 resistance.
I started an easy Z2 ride today and instead of the normal resistance intervals, I’d -1, 0, 1, 2, 3, etc, it was at 10, 20, 30, etc. the jumps between them were huge. I had to ride at 10 at around 100 rpm to be at the bottom of my Z2 range (160-165) and when I bump to 20, it’d jump to like 220 watts at a measly 65 rpm. A massive jump.
I have absolutely no idea what caused the change in the resistance jumps. I’ve looked a bit through settings and online but empty handed so far. Hoping someone else has some familiarity with this.