Was about to say the same. No way a 58 year old exercised and ate better and lost 90 pounds in 6 months. Didn’t want to credit Keto or whatever like a typical lawyer/politician in case there could be some unfavorable connection.
a friend of mine did the same...That’s only 15 lbs a month.
How did I do it?
I resolved that I would walk 10,000 steps every day. On most days I was more in the 15,000 to 20,000 range. Once you hit 20,000 steps, you are in the ten mile range. I walked every morning before going to work, I walked during lunch hour and I walked when I got home. Having a dog helps keep you motivated and your dog will love the new routine!
I cut out all junk food and carefully tracked everything I ate. I would even weigh my snacks (like nuts and raisins) and put them into little zip-lock bags to have with me in case I got hungry. If a one-ounce serving of almonds was 23 nuts, I carefully counted them out and put them in the bag. I had no limit on the calories I could consume but I recorded everything I ate and avoided any food product with added sugar.
It took a lot of discipline but I was motivated and it was gratifying to see the pounds roll off so quickly. People who had not seen me in a while literally did not recognize me.