The “concept” of defining when you are “old” remains largely theoretical until you hit the physical realities of aging. If you are fortunate, you will be able to avoid using the label until your late sixties—or, if you are really lucky, your early 70s.
At some point, though, the realization that your physical body is no longer yours to command will hit you. Going on a diet, or to the gym, won’t re-shape your body like it did when you were in your 40s and 50s. Losing those 10-20 pounds is more likely to make you look gaunt instead of attractively slender and watching your diet won’t be so much about trying to fit into a smaller size as handling the potential for, or symptoms of, chronic illnesses. Surgeries for knees, hips, backs, and eyes will become something you actually find yourself discussing with your doctor at your regular exams. You’ll start to realize this “aging gracefully” notion is going to be an uphill slog—and you’ll find yourself grinding your teeth when someone 30 years younger holds up a silver-maned, rich celebrity who has been airbrushed into perfection as a role model.
But, oddly enough, when you are with your peers, you’ll feel lucky you are dealing with these complaints instead of the really serious stuff some of your friends are facing. You’ll glance at an obituary and realize how good it is to be your shoes—even if they are a low-heeled style with an orthotic. You’ll want to take care of this body which has served you so well for decades so you try to dress it with style while being considerate of its needs.
From your perspective, anyone who is talking about being “old” as a theoretical concept is still “young”. And, you’ll remind yourself, if those “youngsters” are lucky, they’ll be able to join you and your friends around the table laughing at the indignities and challenges of owning an older body when the time is right. Despite others’ good intentions when they tell you aren’t “old”, or that 70 is the new 40, or that you have a “young spirit”, you’ll come to realize that owning the label of “old” is actually kind of fun. Make it your label, define it however you want, and then get on with enjoying your life.