If you've seen all my other posts about my lip injuries, this is unrelated and I'm fine now. What I noticed, however, when thinking about ways to increase my range permanently now, I remembered the 3 times that I went an extended period of time practicing only with a mute, when I had to stay in hotels. During all 3 of these periods (each were about a week) I remember gaining a LOT of range, and then losing it rather quickly when I returned to practicing without a mute. At the time I just attributed the loss to over-playing and didn't think much of it. But is there a correlation here? I've heard some people say that practicing with the extra resistance of a mute helps them gain more strength for when they play without a mute. This could very well have been the case with me, but would that explain why I lost the range I had gained when I went back to practicing without a mute? Anyone with experience on this, please elaborate.