I don’t post many pictures of myself here. It’s appropriate for you to wonder what a “diet doctor” looks like. I tell anyone interested about the benefits of weight management and exercise, and how to do it. At a shade under 6 feet tall (183 cm), I weigh 170 lb (77.3 kg). Last May, I hiked seven miles to Phantom Ranch at the bottom of the Grand Canyon; we hiked the 10 miles back up and out a few days later on a different trail. The canyon is about a mile deep.