I'm older now and to say that my body has changed would be an understatement. Yet, even knowing that, this is confusing. At age 70 I am in fairly good shape. I went to the gym all winter and emphasized lifting for leg strength. Since April I've been riding 2-3 times a week for 70-80 miles. At the start I weighed 197 lbs. Probably 20 lbs over my "ideal" weight. Of course, ideal may not be attainable for me anymore. But, I have managed to get down to 190 lbs. And, my 34 jeans fit whereas my 36 jeans had been a bit tight. This was done with riding and a change of diet. Then I went to my ND and further tweaked my diet. Seriously cut down on starches and especially bread and the like. A couple weeks ago I was down to 188 lbs. Encouraged, I began keeping track of food intake and have been consuming 2,000 cals. a day on average. I've also done some good rides where I burned 2-3,000 cals. The result? I've gained 2.5 lbs. Not sure how this happened. If I was reading this I'd tell the OP that he must be eating more than he thinks. But, I absolutely know that is not true. FWIW, when I went to the ND I had an extensive battery of blood tests and I am in a really good place. No issues. I don't know what to think of this.