Understanding Growth, Maturity and Performance

Understanding Growth, Maturity and Performance

(Why timing matters more than talent in youth sport)

One of the hardest things for young athletes—and parents—to understand is this:

Development is not fair.

Not because effort doesn’t matter.

But because biology has its own timeline.

At AYC, we see it all the time.

One child suddenly becomes faster, stronger and more powerful.

Another seems to stall.

Another appears behind everyone.

This is often not about talent.

It’s about growth and maturity.

And understanding that changes everything.

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Growth and Maturity Are Not the Same

Growth is physical.

It means getting:

• taller

• heavier

• longer limbs

Maturity is biological.

It refers to how far through development an athlete is, especially puberty.

This matters because two 12-year-olds can look completely different:

Same age.

Very different bodies.

Very different outputs.

This is normal.

And it’s one of the biggest reasons comparison can be misleading.

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Why Puberty Changes Performance

Puberty is one of the biggest performance shifters in youth sport.

It changes:

✔ muscle mass

✔ limb length

✔ force production

✔ speed

✔ coordination

✔ power

✔ tendon stiffness

This means:

A child entering puberty earlier often gets a physical advantage earlier.

They may:

run faster

jump further

hit harder

Not because they trained better.

Because they developed earlier.

That’s important.

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Early Developers vs Late Developers

Early Developers

Often:

• bigger sooner

• stronger sooner

• faster sooner

Advantages:

Confidence.

Selection.

Recognition.

Challenges:

They often rely on physical dominance.

Later, when others catch up, they must adapt.

This can be difficult.

At AYC we teach:

Don’t rely on being ahead. Build skill while ahead.

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Late Developers

Often:

• smaller longer

• weaker longer

• slower early

Challenges:

Less confidence.

Less recognition.

Less patience.

But:

late developers often build better habits.

Why?

Because they cannot rely on physical dominance.

They must:

learn

adapt

problem solve

work

And when puberty arrives…

they often surge.

At AYC we teach:

Don’t confuse delay with limitation.

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Why Coordination Often Changes During Growth

One of the biggest frustrations:

“My child suddenly looks clumsy.”

Normal.

Growth changes:

• limb length

• lever systems

• centre of mass

• timing

The brain must recalibrate.

This is why:

running changes

jumping changes

landing changes

balance changes

This temporary “awkward phase” is part of development.

It doesn’t mean regression.

It means reorganisation.

This is where coaching matters most.

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What Coaches and Parents Should Focus On

During growth:

Do not panic.

Focus on:

✔ movement quality

✔ balance

✔ landing

✔ coordination

✔ mobility

✔ isometric strength

✔ body awareness

This keeps the system organised while the body changes.

At AYC, we often adjust training around growth.

Because timing matters.

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Why Testing Helps

At AYC we test regularly because it shows:

trends

Not just outcomes.

This helps us identify:

• growth-related changes

• performance spikes

• temporary drops

• physical adaptation

A slower sprint time during growth isn’t failure.

It may simply be adjustment.

That’s why context matters.

⸻

The Biggest Mistake in Youth Sport

Overvaluing early performance.

The strongest 10-year-old.

The fastest 11-year-old.

The biggest 12-year-old.

These are snapshots.

Not predictions.

At AYC we focus on:

Who is improving?

Not just:

Who is winning now?

Because upward trends matter more than early dominance.

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Final takeaway

Growth changes everything.

Timing changes everything.

And development is rarely equal.

Some go early.

Some go late.

Both have challenges.

Both have opportunities.

At AYC, we don’t judge athletes by where they are now.

We help them understand where they’re going.

Because:

Talent may set the floor.

Growth may change the timing.

But work always shapes the ceiling.