I recently started doing cardio in the morning. My goal is to be able to go 45 minutes at 65-70% HR without stopping. I havnt ran much since my senior year of lacrosse 2 years ago so I do have to work to get my stamina up to not stop but i can usually go for a long time. Recently around the 20th minute my left foot starts to go numb ( like a pins and needles feeling). Around the 30th minute it gets to almost a painful feeling and I stop around 35 minutes because i honestly cant feel my foot. Anyone ever have this problem?? I was thinking maybe a switch to the olyptical(spelling?lol) would do some good. Any input would help.... its kinda bothering the shit out of me