Just because a workout leaves you dripping sweat doesn't mean you got a killer workout. This comparison of weight training and an insanity class proves just that. My friend @tizzy81 worked out with me yesterday and wore her heart monitor watch and got the results on the left. Then the next morning she went to an insanity class and got the results on the right. Her calorie burn was a difference of 200+. She says she sweats more when she in an insanity class versus a weight training workout but the there is the proof of what did her body good. As always, any and all exercise is better than none. And everyone has their preferences. It just comes down to whatever floats your boat. Just get your body moving and sweat!