There's a guy like this in every office. Eats a real lunch, never seems to be dieting, stays lean year after year. And you've probably written him off as lucky. Good genes, fast metabolism, whatever.
I coach that guy. His name is John, and I can tell you it has nothing to do with luck.
John takes most of his calls walking. AirPods in, pacing the house, looping the block. Three calls stack up to about 90 minutes of movement before lunch, and none of it feels like exercise to him. It's just how he takes calls.
That habit puts him in what researchers call high energy flux. Flux is how much fuel moves through your body in a day: food in, movement out. John runs a lot of both. His body spends what he eats instead of storing it, which is why he eats more than clients carrying 40 more pounds and stays the lean one.
But the food-burning part is only half of why flux matters. The other half is the part almost nobody talks about.
Your hunger only tells the truth when you're moving enough.
At high flux, appetite tracks what you actually burn. Researchers found appetite control measurably improves once daily movement gets up around 10,000 to 12,000 steps (Siroux 2024, British Journal of Nutrition). Below that, the signal breaks. You eat like you moved when you didn't, the extra gets stored, and it never once feels like overeating.
So the guy grinding through a salad at his desk and the guy eating a full plate on his feet can have the exact same metabolism. One of them just has an honest appetite doing the portion control for him.
Same metabolism. Different flux.
And flux is the single easiest lever to move, because you don't add workouts to raise it. You take things you already do every day and put them on your feet. John didn't build a walking habit. He built a phone habit.
Open your health app and look at your daily step average. Then compare it to how many meetings you sit through to find your gap.
In your corner,
Coach Zack
P.S. If you're reading this thinking the whole system sounds like what you're missing, movement, food, and an appetite you can finally trust, that's the work I do with a small number of clients: one season, 3 to 6 months, built around your actual calendar. If you want to see whether it's a fit, grab a time and we'll talk it through: