There is no easy way to do this. It requires a lot of work and a lot of time.

1. First, put in some layers. Don’t let the layers fool you though. I think the focus should be on movement that generates body heat. When you are moving, getting your muscles and core temperature raised, you begin to burn calories. I don’t think just sitting in a hot place with a sweat suite on is burning fat. I think that removes the stuff from your body that you need to keep.
2. Add some extra weight to your body. I walk around wearing a pullover and a weight vest. That added weight forces your muscles to burn more calories.
3. You have to do this several times per day. I think the most ideal amount of time is two hours. It’s really hard but the results come fast.
4. The next way to burn a lot of calories is to move heavy weight very fast. Now, you are not “lifting”. This is more closely related to cardio. So, you can sacrifice form. You don’t need full extensions and you don’t need complete flexion. Take squats for example. If you can hold 200 pounds comfortably, then do as many baby squats as you can in one set. This will get your core heated up fast, thus burning fat.