Mental toughness isn't a personality trait. It's a skill — and it runs on biology, not willpower.

Why do some dads stay sharp and calm under pressure while others feel like they're running on empty by noon?

It comes down to three habits that control your cortisol rhythm, stress response, and cognitive fuel. Men who sleep less than six hours show 34% higher stress reactivity the next day — and that alone explains more bad parenting moments than most dads realise.

In this episode, you'll learn:

- Why sleep consistency (not just duration) is the foundation of mental sharpness

- What "stress inoculation" is and why hard days followed by recovery actually build capacity

- The simple transition habit mentally tough dads use to stop bringing work stress home

One practical change this week: pick a fixed wake time and hold it for 7 days. That's where it starts.

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