I started the Insanity workout 3 weeks ago and this has produced great results for me. Best exercise is the lunge, the 'sitting in a chair' bend and wall sit. I hold weights when I do these too and this produces faster results. Going up and down slowly on your toes, exercises the calf muscles....doing it on one leg gets more results. If you have access to weight machines, the one where you're sitting and raising the weight bar works good. Sitting too much is your enemy.