I replied to this message on the Open Forum, but your remark about water made me think of something else. I used to not feel woozy when I worked out, but after a few months, I started to experience woozy spells while lifting weights. On the Open forum, I said that I caught myself holding my breath, and now that I consciously pay attention to my breathing, I haven't had a woozy spell. However, during aerobics, I recently started feeling woozy, too. Ironically, I had started to drink more water during my workouts. When I identified that the wooziness started happening at about the same time I started to drink more during aerobic workouts, I decided to cut back on the water that I drank DURING the workout (just taking sips rather than big gulps). I waited until the workout was finished before taking a big drink. This seemed to put an end to my wooziness during aerobics.