Last week, I watched my 67-year-old neighbor struggle to walk up three steps to his porch, complaining about his “old bones.” The same afternoon, I saw an 82-year-old woman at the gym deadlifting more than most people half her age. Both are technically seniors, but only one seems old.

Jane Fonda nailed it when she said you can be really old at 60, and you can be really young at 85. After spending the last few years navigating retirement myself, I’ve come to realize that age truly is just a number on your driver’s license. What matters is how you carry that number.

The mindset makes all the difference

Ever notice how some people start acting old the moment they hit a certain birthday? They suddenly can’t learn new technology, stop trying new restaurants, and their favorite phrase becomes “I’m too old for that.” Meanwhile, others keep pushing boundaries well into their golden years.

When I took early retirement at 62 after my company downsized, I had two choices. I could either sink into the recliner and start my descent into “old age,” or I could see it as a chance to reinvent myself. The first few weeks were rough. Without the structure of work, I felt untethered, questioning my purpose. But then something clicked.

I remembered a conversation with a friend who’d retired a few years earlier. He told me retirement wasn’t an ending but a beginning. So I picked up that guitar I’d been eyeing for years. At 59, my fingers were stiff, and I sounded terrible. My family probably wanted to hide my guitar. But here’s the thing: I kept at it. Now I can actually play songs people recognize.

Your body follows your mind

Here’s something fascinating: A study found that individuals who perceive themselves as younger than their actual age have significantly lower mortality rates, suggesting a link between feeling younger and greater resilience or a stronger will to live.

Think about that for a second. How you feel about your age might actually affect how long you live. It’s not just feel-good psychology; it’s measurable biology.

The people I know who stay young regardless of their chronological age share something in common. They refuse to let a number dictate their capabilities. They keep learning, keep moving, keep engaging with life. They don’t pretend they’re 25, but they also don’t act like they’re waiting for the end credits to roll.

Breaking the age stereotype trap

Society loves to tell us what we should be doing at every age. Graduate by 22, marry by 30, retire by 65, and then… what? Fade quietly into the background?

I call BS on all of it.

When we stop buying into the narrative that aging equals decline, our bodies actually respond positively. It’s like we give ourselves permission to thrive instead of just survive.

Every week, I take my grandchildren on nature walks. Initially, I started these walks to teach them about mindfulness and appreciation for the outdoors. But you know what happened? They ended up teaching me just as much. Their curiosity, their energy, their refusal to accept “because that’s how it’s always been done” as an answer keeps me sharp.

Best of all, they don’t see me as old; they see me as their adventure buddy who happens to know cool stuff about birds and trees.

The secret to staying young at any age

So what’s the secret sauce? How do some people manage to be young at 85 while others are old at 60?

First, ditch the timeline. Life doesn’t end at retirement. Found an old diary from my 20s recently, and honestly, I barely recognized that person. The growth, the changes, the evolution – it hasn’t stopped. If anything, it’s accelerated since I’ve had more time to focus on what really matters.

Second, stay curious. The moment you stop learning is the moment you start aging in the worst way. Whether it’s a new language, a musical instrument, or just a different route to the grocery store, keep your brain guessing.

Third, move your body. Not because you’re training for the Olympics, but because movement is life. The 82-year-old powerlifter at my gym didn’t start at 82. But she also didn’t stop at 60, 70, or 80.

Finally, surround yourself with people who don’t define you by your age. Find the ones who challenge you, inspire you, and sometimes make you feel like you need to keep up with them, regardless of whether they’re 30 or 80.

Final thoughts

Jane Fonda’s quote isn’t just a cute saying for motivational posters. It’s a fundamental truth about human potential. Your passport might say you’re 60, 70, or 80, but your spirit, your energy, and your approach to life determine whether you’re old or young.

The choice is yours. Every morning when you wake up, you get to decide: Will you be old today, or will you be young? Because trust me, I’ve seen enough evidence to know that the number of candles on your birthday cake has very little to do with the answer.