I only play about once a month, but I intend to get serious about tennis this coming fall. The thing is, should I replace these incredible shoes because they *might* be too heavy? I notice that when I change into my regular shoes after a match, my feet feel like they've just come right out of lifting weights in the gym. I don't notice it until I start driving my stick-shift, though. Do you guys have the same experience? What is your rating and how did you get used to it?