I felt old in my late 50’s when I was 35 pounds overweight. Made old man noises getting up off the couch and walked stiffly the first few steps. Developed the old man tell of looking just a few feet ahead of where I walked.
Lost the weight, took up stretching and posture exercises, do road and mountain cycling multiple times a week.
My face shows my 67 years, but I’m fit and active. And I don’t get up and walk like an old fart.