I used Kettle bells, since, well, I started lifting. So awesome for indoor and outdoor workouts, you can do so much with them and they don't cost much. The fastest way to lose weight without structural damage to your joints is road biking. A one hour ride can burn as much as 3/4 pound of fat, depending on your metabolism and ammount of effort you put into it. It's also extremely healthy for your heart. Great job Cristof, keep it up.