jazz9

You may also be out of shape. I went several weeks without exercise and came back and did a parade that was over 7 miles long. We played over and over, and every time I had to hold out on a long note or play something high, I got a little lightheaded. Is this what you are experiencing? If so, try a little jogging, but whatever you do, take rowuk's advice over mine, because he definitely knows better than I do. :)