Briant_Gumble said:If I remember correctly the average person stores around 6 pounds of waste in their GIT at any given point in time and it can take up to 7 days for food to travel through it.
So I guess if that weight can be lost, there would be a decent improvement in performance.
The potential for having diarrhea in a race seems bad though, using stuff between stages could lead to dehydration.
I don't buy 6 lbs of 5hit in the GIT for 1 nanosecond. Fit healthy athletes have transit times of less than 8 hours sometimes, in addition the lung size and capacity reduces the space available between the diaphragm and whole GIT.