Do you throw up after a very intense workout?

It hasn’t happened to me but I know of a few people who would run to the locker room after several heavy sets of squats, and would throw up. Why is that? Is it a sigh of a good workout?

It turns out vomiting after a workout can be a sigh of a blood lactate build up. Lactate is a by-product of the anaerobic/glycolytic energy pathway. Obviously you should choose a level of intensity that corresponds to your body’s ability to effectively metabolize it. So, slow down if your lactate threshold is not high enough.