How long into the workout is this happening? Are you warming up properly before you run/walk fast? What kind of fuel are you taking in before you exercise?
Writer, mother, wife, and breadwinner. I love to run, but running doesn't love me, so I'm switching to my low-impact bike.
I'm not pregnant, just fat: My blog. fatnotpregnant.blogspot.com/
| current weight: 186.4