lunch & rehearsal

I practiced at lunch, then rehearsed Peter & the Wolf this evening with the student symphony. Good lunch practice, though working on my "high" notes and then the low pedals ran me out of breath and almost to tears, during my warm-up at lunchtime. I must change my attitude about working on these notes that are hard for me to reach. I am trying so hard for them that I sometimes exhaust myself before I even get to the material I am practicing during that session. Now, that makes no sense whatsoever.