Thanks for the helpful responses. When I say power, I basically mean endurance (climbing up a steep, long hill, keeping up with a group on my mtb or roadbike, and being able to ride for a while). So, slow twitch it is. Racing isn't a priority, just want to be able to ride frequently and a little faster.

Two questions from the last two posts: By training "explosively" does this mean doing a high number of reps (how many?) at a lower weight? Am I still lifting slowly or should I be increasing the speed?

Also, plyometrics, don't they work on fast twitch muscles? I see the value of doing them, but they may not be the best for what I want. Thoughts?