Exactly - your body needs different kinds of fuel for endurance than it needs for average intensity and occasional exercise. LA weight loss is a good weight loss program - I have friends who have lost a LOT of weight on it, but it is NOT a diet for endurance training, and they will tell you that. I had to put LA weight loss on hold when I started riding to train for the MS 150.

If you cannot get ahold of the materials the young lady suggested above, you might look at the body for life or Clif Sheats lean bodies. Both focus on fueling your body to meet it's individual needs, rather than on a diet per se. I took Clif Sheats course here in Dallas and learned a lot of things they didnt teach us in nutrition or nursing!

And I second the cut out all white and processed flours and grains. If it doesn't say "Unbromated" or "Stone Ground" I don't eat it. These are niether good fuel nor are they nutritious.

Also - you can ride a lot of miles, but if you arent riding miles with your heart rate in your own personal fat burning zone, you also are not going to drop weight (hence the reason why I have only dropped 2 lbs!) The best way to determine your most efficient training zones is VO2 max testing, or to spend a session with a personal trainer who knows zone training well but that isn't available to everyone depending on where you live. There are generalized guidelines based on age and weight you can apply and see how they feel.

In any case, make sure your doctor is aware of what you are doing and oks a more intense level of exercise. Some of us need things like stress tests to make sure things will be ok.