I'm 54 years old and have finally faced that I push gears that are too high. The last couple of weeks, I'm working on spinning faster in lower gears. I'm getting used to it, and if I'm not imagining it, I feel fresher after riding. In conjunction with this, I'm climbing more slowly so that I can be more kind to my knees. It's a challenge not to challenge myself, if you know what I mean. I feel macho when I climb, and I'm proud that I can climb faster than most young people. Another of my macho ego trips was to use as few gears as possible. I'm trying to give that up. Yesterday, I went through many gears to keep my effort level low. It's hard to give up this egotistical habit.