Anyone experience this? My wife complains that he toes go numb on both feet when she uses a stepper/stair master, a stationary bicycle, or recumbent bike. She cannot remember if they go numb on a treadmill. She has experimented a little bit with different shoes, but usually wears a neutral pair of New Balance runners. She has tried them tied tighter and looser and it doesn't seem to help...
Any ideas?
BigJ