My zones adjusted recently based on my max heart rate increase but it still feels not right. I'd love a power meter but not at the price points they are at now so am working with what data I can. I'm going to go in and play with my zone settings in Garmin and see if I can bump zone 2 up more which is currently 109-126.

We have hills all over the area so I end up having to do climbs which busts me out of zone 2 super easy then it is hard for my heart rate to fall back to the 115 range. Right now my legs are in charge and not my head a lot. It's a constant learning curve.

100k on trails is way harder than the road!