If you want to break yourself, do what I did -- go nonstop for three hours without food or water, and without rest periods between machines. Only faggots sip water every 30 seconds. I'll tell you something most people don't know, because they've never tried this -- your body adapts. The first few days you do this, it is hard. You feel completely dehydrated at the end of the workout. After a week or two, you don't even feel thirsty. Your body doesn't need water every minute when you exercise.
When I was lifting weights, I'd drink occasionally between sets and such. I did it pretty naturally and wasn't forcing it.
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