Think about something physical that you can do easily today that was once difficult.
Walking up a long flight of stairs. Lifting a heavy bag. Running five kilometres. Getting up from the floor. Doing a push-up.
You weren’t simply born able to do these things.
Your body learned.
And that points to something remarkable about the human body:
We are adaptable.
Our bodies are continually changing in response to what we experience and what we ask them to do.
Experience changes us
We often think about our bodies as though they are relatively fixed.
We have strong knees or bad knees.
A strong back or a weak back.
Healthy tendons or damaged tendons.
Good balance or poor balance.
But the body isn’t nearly that static.
Muscles change.
Tendons change.
Bones change.
Our cardiovascular system changes.
Our nervous system changes.
Our coordination, balance and movement skills change.
And one of the most important signals driving those changes is physical experience.
Walk regularly and your body becomes better prepared for walking.
Lift progressively heavier things and your body becomes better prepared for lifting.
Practice balancing and your balance can improve.
Gradually expose a recovering tendon to appropriate load and it can become better able to tolerate load.
In other words:
What we repeatedly experience helps shape what we become capable of doing.
Physical stress isn’t necessarily the enemy
The word stress often sounds negative.
But stress is also one of the ways the body receives information.
When we challenge a muscle, tendon, bone or cardiovascular system appropriately, we’re essentially sending a message:
“You need to be prepared to do this again.”
The body responds by adapting.
This is why I use the idea of Strategic Physical Stress.
The goal isn’t to avoid physical stress.
And it isn’t to overwhelm the body with as much stress as possible.
The goal is to find an appropriate challenge: enough stimulus to encourage adaptation, while still being something you can recover from.
That sweet spot changes from person to person and from day to day.
But the principle remains:
The challenging work you can recover from is often exactly what helps build a stronger, more capable body.
Small experiences add up
We sometimes imagine that changing our physical capacity requires heroic workouts.
It usually doesn’t.
Adaptation happens through repeated experiences.
A few heel raises.
A ten-minute walk.
Practicing getting up from the floor.
Carrying groceries.
A few carefully chosen strengthening exercises.
Going slightly farther this week than last week.
One experience doesn’t transform us.
But repeated experiences become signals.
Signals become adaptations.
And adaptations gradually become capacity.
Experience → Stress → Recovery → Adaptation → Capacity
That’s how much of physical training works.
It’s also an important part of rehabilitation.
But there is another layer: what we believe about the experience
Imagine two people performing exactly the same exercise.
One thinks:
“My knee is damaged. This exercise is probably wearing it out even more.”
The other thinks:
“My knee is sensitive right now, but this is an appropriate amount of load. I’m helping it become more capable.”
The mechanical load might be similar.
But the experience isn’t.
Our beliefs influence whether we move, how confidently we move, what we pay attention to, how threatening sensations feel, and whether we continue long enough to adapt.
This becomes especially important when pain is involved.
Pain can understandably make us cautious.
Sometimes caution is exactly what we need.
But sometimes we begin protecting ourselves long after protection is useful.
We move less.
We stop loading the area.
Our capacity decreases.
The same activity now feels harder.
And that can reinforce the belief that something is wrong.
A cycle develops:
Pain → concern → avoidance → reduced capacity → activity feels harder → more concern
One of the goals of good rehabilitation is to gradually reverse that cycle.
Rehabilitation is partly about creating new experiences
This is why I don’t think rehabilitation is simply about finding the right exercise.
It’s about creating successful physical experiences.
“I loaded my Achilles and it was okay.”
“I walked farther than I thought I could.”
“My knee tolerated those squats.”
“I lifted something that used to worry me.”
“I had some discomfort yesterday, but it settled and I was still able to continue.”
Each experience provides new information.
Over time, two things can begin changing together.
The body develops more capacity.
And:
The person develops more confidence in their body.
That combination is incredibly powerful.
You are not just exercising. You are training adaptation.
This changes the question we ask.
Instead of:
“How do I avoid stressing this?”
we can sometimes begin asking:
“What level of physical stress would help me adapt?”
Instead of:
“How do I make sure I never feel this?”
we might ask:
“What can I safely and confidently do today?”
And eventually:
“What is the most challenging thing I can do without creating a flare-up I can’t recover from?”
That is a very different relationship with our bodies.
We’re no longer simply protecting them.
We’re training them.
Your body is listening
Every day we give our bodies information through experience.
Sometimes the message is:
“You don’t need to do very much.”
And the body adapts accordingly.
Sometimes the message is:
“You need to be able to walk farther.”
“You need stronger legs.”
“You need this tendon to tolerate running.”
“You need to be comfortable lifting this weight.”
Given appropriate challenge, recovery and enough time, the body has an extraordinary ability to respond.
You don’t need perfect exercises.
You don’t need heroic workouts.
And rehabilitation doesn’t have to mean waiting until everything feels perfect before you begin moving again.
Start with what you can do.
Challenge it appropriately.
Recover.
Repeat.
Then gradually ask for a little more.
Because your physical experiences aren’t simply things that happen to your body.
They are some of the signals that shape what your body becomes capable of doing.
