This is precisely the reason I started using TR. I was out of shape and would get absolutely thrashed on climbs (MTB). Now I am firmly #TeamMidPack on the climbs and I have plenty of legs left to drop the hammer on the fun parts too.
I do enjoy casual races or timed events on the MTB for fundraisers or the like, however there are next to none in my area so I might do one or two of those this year if I can find them.
I have done SSB LV 1 and 2. I started short power build but with my work schedule bouncing all over the place I have come to the realization that I’ll be doing SSB on repeat for now.