Two hours into a Rolling Stones show, the Hackney Diamonds Tour, more than 60 years since the band first plugged in at the Marquee Club, Mick Jagger is still running the length of the stage, still throwing his hips, still hitting the falsetto on "Miss You" like a man half his age chasing a woman twice his speed. No stool. No teleprompter crutch. No easing into the set list. He opens like he's got something to prove because, to Mick Jagger, at 82, he does.

Here's the part people miss when they marvel at it: it isn't magic, and it isn't just genetics (though genetics help considering his father was a fitness instructor who lived to 93). The truth is, Jagger’s stamina has more to do with his plan than anything else. Jagger trains six days a week under a Norwegian coach named Torje Eike. Ballet for footwork. Kickboxing for wind. Swimming and cycling for the joints his knees can't afford to lose. Five to eight miles of running once a week, just to remind his lungs who's in charge. Yoga. Pilates. Meditation. Doctors have compared his cardiovascular fitness to men in their 30s. He's half their age, and his heart doesn't know it.

Keith Richards, who has watched this up close longer than anyone alive, once said the difference between him and Mick is that Mick trains like an athlete preparing for a fight, while Keith trains like a man preparing for a nap. That's the joke. It's also the whole lesson.

Because here's what nobody tells you about staying relevant: it isn't talent that fades first. It's discipline. Talent got Jagger the gig at 19. Discipline is the only thing that gets him back on that stage at 82, in front of 80,000 people who could have stayed home and streamed the old records instead. They didn't come to hear "Satisfaction" the way it sounded in 1965. They came to see if the man who wrote it could still sell it. He sells it because he never stopped training for it.

When someone who is coaching a program or running a department says they're "past their prime" at age 45 or 50, and telling themselves the work of staying sharp is for younger people now, Jagger would say that's backwards. The work doesn't get done because you're young. You stay young, sharp, fast, and relevant because you keep doing the work. He didn't earn the right to skip a workout by selling 250 million records. He earned the right to sell more by never skipping one.

That's the trade nobody wants to make. Everybody wants the encore. Nobody wants the six-day training week that makes the encore possible.

So ask yourself what your version of the five-mile run is. Meaning, what’s the unglamorous, unwitnessed thing you have to keep doing long after anyone's applauding, just so you can still deliver when the lights come up?

Now ask yourself, are you doing it? Or are you living off the set list you built 20 years ago, hoping nobody notices you can't hit the notes anymore?

Jagger doesn't perform because he's still capable. He's still capable because he refuses to stop performing. The discipline created the longevity, and the longevity is proof of the discipline. You don't get one without the other, and neither shows up without the work. Get after it today.

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