If you want to begin with lifestyle changes and exercise is your top priority, go out and buy a pedometer and work up to 10,000STEPS PER DAY. I love my pedometer. I put it on in the morning and track every step. You would be surprised how little walking you get in if you sit at the computer all day. On the other hand if you have steps in your house and you vacuum daily, run errands, do the gardening, and walk to the mailbox, you may find that by mid afternoon you have over 5, 000 steps. Now all you have to do is go out and take a brisk walk for less than an hour and you will have your 10,000 steps. You can sneak steps into your day by parking your car farther away, walking up and down every aisle in the supermarket, window shopping at the mall, or simply walking around while chatting on the telephone. I wish I had invented the concept of 10,000 steps. 10,000 Steps is equal to about 5 miles of walking. In the beginning don’t worry if you are getting sufficient aerobic exercise at your target heart rate, just WALK. Once 10,000 steps is a habit increase your intensity and frequency, but for now just clip on your pedometer and get walking, and of course, if you are not used to exercise, check with your doctor to make sure you are ready to begin.
I found a great web site using this concept.