Recently, my fitness instructor, directed me to the idea of a personal trainer. The idea was that even though I thought that I was getting enough exercise, she actually knew better. At first, the idea of a personal trainer seemed somewhat over the top, but I have definitely changed my mind. If you don't already have one, get a personal trainer, you may find that do this helps you more than having a family doctor, and it is much less expensive.
Training and being trained means that you are preemptive in your strike against the greatest source of ill health, namely lack of consistent and appropriate exercise. Ever wonder how the Japanese pulled off the their industrial revolution in the 1960s and 1970s. Sure they improved on everything they saw, but more importantly, they improved on the way they saw exercise to improve individual health as an asset to the firm, the country and above all to the individual.
The first thing that your presonal trainer will look at is your posture and distribution of fat. Probably, you can't carry all that weight without ruining your posture. Either stengthen your muscles to carry the weight you do, or lose the weight. Believe me it is much easier to lose the weight. Begin by half sizing your meals if you have not already done so. Refer to my blog on this susbject: http://woohs.blogspot.com/2007/11/half-size-mine-please-i-am-trying-to.html
Your trainer will help you work up your muscles to the point where you move more easily and you have greater flexibility. Hopefully, you will be losing weight as you exercise. Don't try to everything at once. A gradual approach gives you time to adjust to the process of creating a healthier and stronger new you.