anyone know if it's good better to workout in sweatpants and sweatshirts compared to say a wife beater (aka a-shirt) and shorts? you sweat more. your body temperature is higher so your muscles are warmer. does this help lose fat? or does it also help lose muscle? do you lose more calories this way? i imagine it would be better to wear warm clothes if your trying to lose weight, but how about if your just trying to tone your abs, and stay cut, but add muscle mass?