I'm having some "intestinal distress" with my Friday circuit workouts. Last week I did 3 circuits in about an hour and twenty minutes with 1' between sets and 5' between circuits. Yesterday I did 3 circuits in an hour with no rest between sets and 2' between circuits (I was short on time ). Both days, I found my stomach bothering me by the end of the second circuit. Not that queasy stomach feeling that I associate with nausea, but actually having acid or bile or something yucky come up in my throat, especially if I did anything bent over (like triceps kick backs). Yesterday I cut out my last set of abs because I was afraid I might vomit in the gym (OK, and look like a weenie). I even took a dose of Pepto before the workout yesterday, but I don't know if that made things better or worse. What am I doing wrong here, folks?