Recently figured out that my BMR is about 1900 calories a day. I ride my bike four days a week and always wear a HRM that also displays calories. My rides are 30-40 miles and I`m burning 1500-2000 calories per ride. I`m not looking to gain or lose weight. I`m 55yrs. old 5`11, 175-180lbs. My question is on the days I Ride should I be consuming an additional 1500-2000 calories to keep my weight the same. Seems like a lot of additional food or am I missing something.