Yah, sorry, I was also short for time to the point of extreme brevity but not to the point of delaying responses until I had more time for this whole thread. I should have also given the example of t he ideal male BMI being 18-25 so call it 22 and over 30 BMI being obese which, on a 5'10" person (pretty average for a male) corresponds to roughly 154 lbs vs roughly 205 lbs for a 50 lb spread. It's not the 10-20 lb spread that is probably seasonally normal. Trying to reverse that with just exercise is a gargantuan task, it's primarily diet that will reverse something like that (but you definitely should still exercise, it does all sorts of good things for your body on a reasonable schedule with reasonable recovery periods, especially resistance training, which is more true the older you are)