I'm wondering if there's any validity to something I've noticed. I usually don't take days off, I'm either playing nightly gigs that are pretty hard on me, or I'm practicing on the days in between. The more I play w. out rest days the more my lips seem to swell and make it harder on me to perform at the same level as when I'm fresh from a day off. However, sometimes things come up that require me to be away from the horn for anywhere from 3-5 days, not very often and when they do occur, it's usually after 3-4 week periods of brutal playing. Sometimes when I come back after these 3-5 days off the horn, I swear my overall performance and power feels better, as if my level has gone up a notch. I'm wondering if, while it feels to me that I'm just bashing my lips for 3-4 weeks at a time and not getting much better, if these 3-5 days off actually allow my lips to rest, and they are building back stronger from all the playing, while they are in a rested state?