Originally Posted by will dehne
Based on my experience: Performance Road Biking at your limit (and above) does not go well with weight reduction. Perhaps I am biased because of my age of 64. I will bike nearly 10,000 miles this year and have lost no weight but my speed average is up.
That's about right because when you're riding right at your LT, you're burning pretty much all carbs and no fat at all. The other problem is that you can't ride for 3-4 hours at a time at this pace anyway.
Back off to about 10-15% below and you'll burn close to the maximum amount of about 200-250 cal/hr from fat. The more fit you are, the higher the amount of fat burned at any given pace. Also riding at a slower pace will allow you to go for 3-4 hours at time, it's the hours after the 1st one that really burns off the fat.
