During reasonably active exercise I have to stop and catch my breath, rest a bit then start up again. When I m done, as I reach down to undo my boots i have a feeling of losing my balance and have to rest again to catch my sense of balance. Today was really more faint like than usual. I really thought I might pass out. I guess i ve gotten use to this but today was harder than normal to regain my composure. Kind of sounds serious but I don t want to alarm anyone and I m pretty busy with work.