It's no mystery…I am lifting heavy (for me) 3x per week and riding 1-2 times per week instead of riding 3-5 times per week. When I do ride my legs are pretty zapped from the intensity of my strength workouts…and I'm ok with that right now.
I guess what I was trying to say is that if you have limited time to train, and your goal is to improve your climbing/endurance…then maybe spending that time strength training instead of on bike training isn't the best way to do that. Especially if like sparkplug, you are already doing 1.6 BW squats.
well there you go; you've replaced riding with lifting so it's no wonder that your riding has suffered. and yes, you are right that if you have limited time you need to spend as much of it as possible on the activity you want to improve the most. that's why i suggested to sparkplug to start riding for time on the climbs and adding intervals into the climb as well. if you want to be good at something, you need to focus on that something and any other activities you throw into the mix should be complimentary to what your main focus is, or at the very least not take away from it.
the caveat to that is that in the overall plan, it can be beneficial to take a step away from the main activity to focus on bringing up a weaker area for a little while. while the main activity will suffer, in the end the improvements in other areas you make will help your main goals. like you say though, in sparkplug's case a more than sufficient level of leg strength has already been achieved so adding to that is probably not going to help the climbing much more than it already has.
in our aspirations to become fitter/faster/stronger, we reach a point where continued improvement is more a function of desire, hard work and the willingness to suffer through that hard work. if it wasn't hard and didn't hurt then we'd all be out running 3 hour marathons or doing the nimby 50 in 3 hours as well.
We don't know what our limits are, so to start something with the idea of being limited actually ends up limiting us.
Ellen Langer