You lost it over something that didn't even matter. Or you went quiet and shut down when they needed you. Either way, you can't shake the feeling that you failed them as a dad.
That feeling has a name.
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You were outside your Window of Tolerance. It happens to the best dads out there, not because something's wrong with you, but because your window hasn't had the chance to grow yet.
I first came across Window of Tolerance in foster care training, the trauma-informed approach to parenting. I never thought it would explain my own living room. But it does.
Once I saw how small my own window had gotten, I knew something had to change.
So I took it one stone at a time. The energy, the training, time for myself, knowing my own pattern. Those became the four pillars.
Then I put it all into a book. ↓
Everything I use to stay inside my window. For fathers ready to widen theirs too.
THE BOOK
The Open Window
What the window is, why it closes, and how to keep it open. Page by page.
What the Window Is
Psychiatrist Dr. Dan Siegel named it the window of tolerance: the space where you can handle life. I learned it in my foster parent training, but I only ever used it for the kids. Never on myself. The book starts there, with the moment it finally made sense.
Why It Closes
It isn't random, and it isn't your personality. After a night without sleep, the brain's alarm centre reacts about 60% more strongly. When blood sugar drops, we get shorter with the people closest to us. The book walks through the research, with sources, so you understand what's actually happening.
The Four Pillars
Energy Windows, Strength, Recharge, and Know Yourself. What each one is, why it holds your window open, and how I use it in a normal week. Energy Windows goes deepest: the three windows, what energy is, and how to find your own number, in lbs or kg.
When It Closes Anyway
Because it will. Mine still does. The signals to catch it before it happens, and how to repair after, built on Ed Tronick's research: even in loving families, parents and babies are only in sync about a third of the time. What builds strong kids isn't a perfect dad. It's a dad who comes back.
Your First Week
The small daily habits, the kitchen basics that make it easier, and a first week to get going. One small stone a day.
50 Recipes
Sorted by window, each with energy, macros, a photo, and a why-it-works note. The ones I eat most are marked. The Greek Chicken Bowl is what I often reach for in the morning, and the Kebab Roll is one my wife and I keep coming back to in the evening. Every one logs straight into The Summit App in seconds.
Reading about it is one thing. Living it is another. The book explains every pillar. The app is where you practice them, and the book is inside the app too. ↓
One app. Every pillar. Every day.
THE APP
The Summit App
The app is where you live it all.
Log Your Energy Windows
Every recipe from the book logs straight into the app in seconds, so Pillar One isn't just something you read. It becomes something you actually do.
Strength, Pillar Two
8 exercises with form videos and PR tracking, two sessions a week. That's it. This is how I actually stay in shape and watch myself grow, mentally and physically, without it taking over my whole week. It doesn't take time away from my family. It gives them more of me. Watching the app show me getting stronger over time means more window, more capacity for the people who need me.
Recharge, Pillar Three
You choose your own Recharge in the app, whatever actually gives you energy back. Mine is 8,000 steps, often a walk in the mountains near home. I log it myself, so Pillar Three isn't just something I know matters. It's something I can see adding up.
Know Yourself, Pillar Four
This is the one that changed things most for me. Every time my window closes, I log a Window Repair: what happened, what set it off, what would help next time. Over time, the app shows my pattern, what keeps closing my window, and when.
Once I can see it, I catch myself in the moment. "I'm here right now." And from there, it's so much easier to stay steady.
Pillar Foundation
Log your Energy Windows, your Recharge, your water, and when you Connect with the people you love, so it doesn't get lost in a busy week. All four sit together under Pillar Foundation, with a quiet kind of leveling up built in. Nothing loud, just proof that you're moving in the right direction.
Plus a few more tools that make it easier, streak protection, all built to keep you inside your window.
What dads are saying
“it hit me in my chest... bills, expectation, love, exhaustion, lack of sleep, post-trauma, everything like a storm, and it sometimes makes you snap.”
@zimzimaproductions
“I'll definitely try the writing it down thing!! That helps a ton picking up on things”
@fitnessm_nava25
“I get this and I wish I could see it coming and stop it before it happens.”
Mark
THE OPEN WINDOW
$49
The book alone. The window, the science behind it, all four pillars, and 50 recipes. To log your days and your Window Repairs, you'll want the app.
Everything in the book, plus the app, with the book inside it. Log your Energy Windows, your Strength, your own Recharge, and your Window Repairs, so you can see your pattern and catch it before it happens.
1. Get instant access→2. Download your book and install the app→3. Start widening your window tonight
Questions, answered
Do I need the app, or is the book enough?
The book gives you the full picture: what the window is, why it closes, all four pillars, and Energy Windows in full. But if you really want to live it, not just read it, the app is where that happens. You log your days, track your Window Repairs, find everything you need for strength training, and watch your own pattern build over time.
Where do I learn how the four pillars work?
All four are explained in the book: what each pillar is, why it holds your window open, and how I use it. Energy Windows goes deepest, with your numbers and all 50 recipes. In the app, they come alive: you log them and see your own pattern build.
How do I get the app?
It's not in the App Store. It's a web app: open the link on your phone and add it to your home screen, and it works and feels like a regular app from there. No downloads, no waiting.
What if I lose my phone or switch phones?
Your data lives only on your device, nowhere else, so it's completely private. The app reminds you to back it up. One tap copies a backup key you can save and restore from anytime, so switching phones doesn't mean losing your progress.
Do I need a gym?
No. You just need to work all the major muscles in your body, twice a week, that's it. The app shows you 8 exercises with form videos, and each one lists other ways to do it too, so you can swap in what you've got. I started at home with a couple of dumbbells.
What if I miss a day or go on vacation?
Life happens. You get one Streak Freeze a week, a 24-hour pause that protects your streak while you take care of what matters. On vacation I don't even use it religiously. My streak drops sometimes, and I just come back to it afterward. That's the point: not perfection, just coming back.
How does the app know what to eat?
You enter your numbers once, and the app gives you a simple daily target, so there's no guessing. But that's not the end goal. It's there to help you learn your own pattern, what you can eat and when, the same way I did. Once that clicks, the target becomes background noise. You just know.
Do I need to cut out alcohol or treats completely?
No. We're climbers, not monks. Enjoyment is part of a life you can actually keep living. It's an 80/20 rhythm, not a prison. I'll enjoy a glass of wine with my wife, and that's not going anywhere. Just know alcohol isn't free: it affects your sleep, your mood, and how present you are the next day. Lean toward light or sugar-free, and stop before it costs you tomorrow.
Does the app work in kg or lbs?
Yes, both. Switch anytime in Training, and everything updates with it: your Load, your Records, your Progress chart.
What about notifications?
Reminders work while the app is open: a nudge when a new window starts, or in the evening if your Pillar Foundation is still waiting.
What's your refund policy?
If it's not for you, message me within 30 days at Johannes@thesummitdad.com and I'll refund you. No hoops to jump through.
Johannes, The Summit Dad
A foster dad, showing up for five kids. There was a point where I didn't recognize myself anymore, body or soul. I built this because I needed it myself, not as theory.
Your window shapes more of your day than you'd think. This is how I learned to keep mine open.
