Is Sweating (Or lack thereof) an indication of fat loss?

[kaija]

Since I've been working out 5-6 days a week, I've noticed that my cardiovascular activity isn't making me sweat as heavily as it used to. I would walk off the treadmill soaking wet before!!

Now, I don't sweat very much at all, but I've noticed that I tend to break into sweats when I hit the weights.

I'm wondering, if this is an indication that I need to increase my cardiovascular activity?

Is it simply that I'm getting used to the workout?

Am I hitting a plateau?

I haven't lost ANY weight at all in 2 weeks, but I'm still weight training for my arms and legs, doing yoga, and hitting the treadmill.