The Window That Didn’t Care How Hard I Worked
Why timing determines whether effort works at all. A personal story about missing the coordination window — and watching his son catch what he couldn’t.
The Effort That Didn’t Stick
There’s a moment in development where effort stops mattering as much as timing. I didn’t know that at the time.
When I was young, I worked hard. Really hard. In Grade 9, I lived in the weight room. I added muscle quickly, and the attention that came with it reinforced everything I was doing. Coaches praised it. Teammates noticed it. Strength felt like progress you could measure.
So I doubled down.
What I didn’t realize was that while I was getting stronger, I was quietly missing something else. Not because I was lazy. Not because I didn’t care. But because I was spending my limited developmental bandwidth on the wrong inputs.
Years later, I tried to fix it.
I tried to learn how to skip rope properly. How to hit a tennis ball cleanly. How to roll, invert, react, and coordinate without thinking. I put real effort into it — adult effort. Focused effort. Intelligent effort.
And I learned something unsettling.
No matter how hard I worked, my body didn’t absorb these skills the way it should have. I could improve, but the learning was slow, brittle, and conscious. Nothing stuck automatically. Nothing layered cleanly.
The window that made those skills easy was gone.
Not metaphorically. Biologically.
That was my first real clue that effort and outcome are not always proportional — especially in development.
Then I Watched My Son Do the Opposite
Years later, I watched something very different happen with my son Max.
Max didn’t train harder than I did. He didn’t specialize earlier. He didn’t have better coaching. In fact, at the start of almost every competitive season, he was rusty. Often in the bottom quarter of the team.
But then something strange would happen.
As the season progressed, he would accelerate past kids who had been doing the sport year-round. He didn’t just catch up — he adapted faster. He saw patterns sooner. He moved with solutions instead of reactions.
The effort hadn’t changed. The timing had.
The fork in the road had already happened — years earlier — when his nervous system was still plastic enough to absorb movement instead of memorize it.
Sensitive Periods: Why Timing Changes Everything
In biology, these are called sensitive periods — windows of time when the nervous system is unusually responsive to certain inputs.
Miss the window, and training still works. It just works inefficiently. That’s the part most people don’t understand.
The same training stimulus can produce wildly different returns depending on when it’s applied. Not because the athlete changed. Not because motivation dropped. But because the nervous system no longer learns the same way.
This isn’t philosophy. It’s biology.
Sports scientist Józef Drabik defines sensitive periods precisely: “the periods in human life when the organs and systems that determine a given ability are undergoing intensive development” — when they are “most receptive to a training stimulus developing that ability” (Children and Sports Training, p.12). His training principle follows directly: “training is most effective when it stimulates maturing abilities rather than those already matured.” That last sentence is the one I needed at fourteen. Effort applied to a window that has already closed still produces results — but at a fraction of what it would have returned during the window. I tested this on myself for years before I understood what the test was measuring.
The Highway, the Exits, and the Ones You Can’t Go Back To
I often think about sensitive periods like this.
Imagine you’re a car driving down a highway. That highway is life — you’re moving forward whether you want to or not. You can’t slow it down. You can’t stop it. Time passes.
Along the way, there are exits. Some exits lead to small towns. Some lead to large cities. Those towns and cities are motor qualities: speed, strength, endurance, coordination. Each one has a rich internal network — roads, buildings, infrastructure. If you take the exit at the right time, you get to explore. You build roads. You learn the layout. You create depth.
If you stay on the highway, you keep moving — but you don’t build anything.
Here’s the part that matters: if you miss the exit, you cannot turn around. You can still build later — but only from the highway. You never get the same access. You never get the same rate of return. That opportunity is gone forever.
Always plastic. Compounds forever. The one quality that never fully closes — but adapts fastest early.
Adapts best before adolescence. Once the nervous system matures, the rate of return drops significantly.
Expresses best post-puberty. Building too early wastes developmental bandwidth that should go to coordination and speed.
Changes with biological maturation and differs by sex. Responds to training across the lifespan but peaks vary.
Strength, speed, and endurance all have peaks, valleys, and missable windows. Coordination doesn’t. It accumulates. It compounds. It transfers. As long as you keep feeding it with novel movement, curiosity, and variation, it keeps growing.
That single fact explains almost everything that follows.
“So Did I Blow It?”
At this point, a lot of parents are thinking: “Okay… my daughter is 13. I didn’t know any of this. I guess I blew it.”
No.
That’s the wrong conclusion.
The beauty of this information is not that it tells you what you missed — it’s that it tells you what still matters.
Coordination is always trainable. Everything else is time-sensitive. Which means you haven’t lost the game — but you have lost certain advantages. And pretending otherwise doesn’t help anyone.
Greg vs. Max — A Side-by-Side
When I compare my development to Max’s, the differences become obvious.
I didn’t fail because I didn’t work hard. I didn’t fail because my training was stupid. I failed because my nervous system stopped learning the same way — and I didn’t know it had happened.
Why This Matters Now
Because the window doesn’t announce itself when it’s closing. Because effort feels productive even when it’s misapplied. Because once a learning rate collapses, no amount of discipline brings it back.
And because understanding this means the next generation doesn’t have to repeat the same mistakes.
My failures don’t get a do-over. But every athlete I train does.
The uncomfortable question is no longer whether timing matters. It’s what we actually do with that knowledge — before the exits are missed.
Development System Explained
If this story is your first introduction to Jungle Athletics, the sensitive periods and development windows above are one piece of a larger training system. Before booking, most parents find it useful to understand how the windows, the training approach, and the athlete analysis all connect.
Where Is Your Athlete
on the Highway?
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