03/09/2026
Every founder I coach has the same routine. Peloton at 5am, protein shake, back to back meetings. Still can't lose the last 15 lbs.
Then they hit 45, testosterone already fighting an uphill battle, and that cardio session is quietly making it worse.
I'm 44 myself, and everything I coach is exactly what I do to stay in the shape I'm in at this age.
Here's what nobody tells high performers about steady state cardio after 40.
It's a stress signal to your body, not a fat loss tool.
You're already running on 5 hours of sleep and back to back calls. Add an hour on the bike and your cortisol doesn't come down, it stacks.
Chronically elevated cortisol does three things that wreck the exact result you're chasing. It breaks down muscle tissue for fuel. It blunts testosterone production.
It makes your body hold onto fat around the midsection, because as far as your nervous system's concerned, you're under threat and threat means store energy, not burn it.
So the guy doing 5am cardio and eating "clean" stays stuck, while the guy lifting heavy and walking 10,000 steps drops fat and finally sees muscle definition he hasn't had in a decade.
This isn't a hot take. It's basic endocrinology that the fitness industry doesn't want to talk about because "cardio more" is easier to sell than "understand your hormones."
Resistance training preserves and builds the muscle that drives your metabolism.
Walking manages stress without adding to it. That combination is what actually changes your body composition after 40, not more cardio.
If you're still doing 5am cardio sessions and wondering why nothing's changing, this is why.
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P.S If you want to see my exact process for getting CEOs in their 40s, 50s and beyond back in shape around a packed schedule, travel, and client dinners, I broke it all down here: https://start.helenparkerfitness.com/phased/