Sweating: Does the amount I sweat reflect how many calories I am burning?

WRONG. Did you know we all have 2-4 million sweat glands, and woman tend to have more then men. Our body sweats to cool us down, so if you're a particularly warm person, when you workout you will probably sweat more.

On the flip side, if you look next to you in a hot yoga class and the person is lightly perspiring and you're drenched, it could be because they are dehydrated or blessed with minimal sweat glands. Some studies also indicate that the fitter you are the less you sweat. Through my experience I wouldn't completely agree with this, as some of my fittest clients look like they just went swimming after our workouts. Another study indicates that if you smoke, drink caffeine and/or alcohol your body will sweat more because these 3 lovely habits stimulate the central nervous system, activating your sweat glands

In conclusion the amount you sweat has nothing to do with the amount of calories you burn. Sweating is a great way to rid the body's toxins so make sure you sweat at least once/day if not a few times/week.