Agreed, I'm a sweaty person naturally, and I'm now 1000x more fit than a few years ago. During my last work term, most people at my firm would wear sweaters/cardigans at the office and I could easily wear a short-sleeve shirt. Eta: another example, I speedwalk nearly everywhere, and if I'm wearing layers or something I'll start sweating even after a few minutes, without getting my heart rate up much.