The gun goes off in three minutes.
I'm at the start line of a 5K on a warm May morning. There are hundreds of people around me. Some are stretching. Some are staring at their watches. The energy is fun and nervous. I'm just standing there, breathing.
I've been building toward this for six months. Six months ago, I couldn’t even run due to severe back pain. Twenty weeks of intense PT, interval work, zone 2 runs, and a few track workouts were in the barn. I know exactly what I've done. The nerves still showed up.
When you choose to do a hard thing on purpose, preparation doesn't cancel the discomfort. It changes how you carry it.
I finished totally spent, but settled. I'd been fighting a cold all week. My body held the line without me forcing it. Twenty weeks of training showed up exactly when I needed it most, even when I didn't feel like I had anything left to give.
That moment is exactly why I signed up.
THE SCIENCE
When you voluntarily put your body under physical stress, your brain activates the HPA axis. That's the hypothalamic-pituitary-adrenal system. It's also the same system that fires when you're facing a surprise crisis, a tense executive staff question, or a difficult conversation at noon.
Stress is stress, physiologically. Your HPA axis doesn't sort by category.
Repeated voluntary training changes your system to get better at recovery and regulation. And that regulation carries over to everything else.
Regular exercisers showed significantly blunted cortisol responses to acute stress compared to sedentary controls. The researchers exposed both groups to the same stressor. The trained group showed less reactivity and returned to baseline faster (Childs et al., 2014).
This is stress inoculation. You expose yourself to manageable doses of voluntary discomfort, and over time, your nervous system learns how to handle the stress. The threshold for what feels overwhelming shifts upward.
The hard things you do outside of work inoculates you from work stress.
THE TAKEAWAY
Forty percent of corporate professionals face daily stress (Gallup State of the Global Workplace Report, 2026). Training your stress response voluntarily reduces the negative impact of work stress.
That's a gap.
When you voluntarily take on physical challenges week after week, you're doing more than building fitness. You're teaching your nervous system that hard things are survivable. This is physiological conditioning that translates to the workplace. You're not just getting fitter. You're widening your tolerance for pressure.
The next time a project implodes or a difficult conversation lands on your calendar, your cortisol system is drawing on everything you trained. Train it well and the quality of your response will improve.
YOUR EDGE THIS WEEK
Everyone’s tolerance to physical stress is different. Choose your “hard” and get it done. Pick one voluntary challenge this week. Something uncomfortable. Something with a clear finish. A workout you've been avoiding. A distance you haven't run. A hill you always skip.
Do it on purpose. Get all the way through. That's the inoculation.
Be well,
Eric
P.S. The Peak Performance Workshop is an interactive and fun session to train four peak performance superpowers in ninety minutes. Hire me for your next team meeting and realize the benefits the next day! Book a call here to learn more.
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