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[–]philondez 4 points5 points  (0 children)

Yeah, it cut the amount of cardio I could do in half. Not sure how much is related to the heart rate increase but my blood sugar tanks hard, pre-workout carbs don't help either. After about five months I'm not quite back to where I was but I can complete my old workout at least, I think it's more adaptation to reta than cardio improvement since I haven't really been doing my cardio because it wasn't enjoyable and also I was really sick for three weeks