If you’ve ever had persistent pain in your Achilles, knee, shoulder, hip, or elbow, there’s a good chance you’ve been told it’s “tendinitis.”

You may have rested, stretched it, or even taken anti-inflammatories… only for the pain to come straight back.

This is one of the most common and frustrating issues I see in clinic.

The problem? Most tendon pain isn’t what people think it is.

What Is Tendon Pain, Really?

Tendons are strong, fibrous tissues that connect muscle to bone. Their job is to transfer force and allow movement — whether that’s running, lifting, or simply walking upstairs.

They’re incredibly strong structures, designed to handle loads several times your body weight. But they rely on one key principle:

They adapt slowly.

When load increases gradually, tendons get stronger.

When load increases too quickly — or recovery is poor — they become painful.

The Big Misconception: It’s Not Just “Inflammation”

For years, tendon pain was labelled as tendonitis, suggesting inflammation.

But modern research shows something different.

Most long-term tendon pain is actually tendinopathy — a condition driven by:

Overload (too much, too soon)
Reduced capacity (the tendon isn’t strong enough for the demand)
Changes in tendon structure
Increased sensitivity in the nervous system

This explains why:

Rest doesn’t fix it
Stretching alone doesn’t work
Anti-inflammatories only give short-term relief

The issue isn’t just inflammation — it’s a load and capacity problem.

Why Tendon Pain Happens

Tendinopathy usually isn’t caused by one single event.

It’s a gradual mismatch between what your body is doing… and what it’s prepared for.

Common triggers include:

1. Sudden Changes in Activity

Starting running, increasing gym weights, or doing more than usual after a quiet period.

2. Repetitive Movements

Same movement, over and over — especially without variation (e.g. running, typing, lifting).

3. Poor Recovery

Sleep, stress, and fatigue all affect how well your body adapts.

4. Prolonged Positions

Things like sitting all day, then suddenly exercising, or positions that compress tendons (like crossing legs or deep squats).

5. Age and Conditioning

Tendons naturally adapt more slowly over time — but strength training can counteract this.

In most cases, it’s not that something is “damaged” — it’s that the tendon is overloaded relative to its current capacity.

Why Pain Doesn’t Always Mean Damage

One of the most important things to understand:

Pain is not a direct measure of tissue damage.

Tendons become more sensitive when overloaded. The nervous system amplifies signals to protect the area.

That’s why:

Some people have significant tendon changes but no pain
Others have a lot of pain with minimal structural change

Pain is influenced by:

Load
Fatigue
Stress
Previous injury
Confidence in movement

This is why tendon pain can feel unpredictable — and why a simple “rest it” approach often fails.

Why Rest Alone Doesn’t Work

It’s natural to stop using a painful area.

And short-term, that can help calm things down.

But longer term?

The tendon gets weaker
Muscle support reduces
Capacity drops even further

So when you go back to activity… the pain returns.

This is the cycle many people get stuck in.

Rest reduces symptoms temporarily — but it doesn’t solve the underlying problem.

What Actually Works (Backed by Evidence)

The key to fixing tendon pain is simple in principle — but needs to be done properly:

1. Load Management (Not Rest)

This means adjusting activity, not stopping it completely.

Reduce intensity or volume temporarily
Avoid sudden spikes in activity
Keep moving — just at a tolerable level

A useful rule:
Pain during exercise should stay around 3–4/10 or below

2. Progressive Strength Training

This is the most important part of rehab.

Research consistently shows that tendons respond best to:

Slow, controlled strengthening exercises
Gradually increasing load over time
Targeted exercises for the affected tendon

Examples:

Calf raises → Achilles pain
Squats / step-downs → Knee (patellar tendon)
Hip strengthening → Lateral hip pain
Wrist strengthening → Tennis elbow

Progress takes weeks, not days — but this is what rebuilds capacity.

3. Patience and Consistency

Tendons adapt slowly.

Most people start to notice meaningful improvement after:

6–12 weeks (sometimes longer)

Consistency beats intensity every time.

4. Avoid Irritating Positions Early On

Certain positions compress tendons and can slow recovery.

For example:

Crossing legs → can aggravate hip pain
Deep knee bends → may worsen knee tendon pain
Sleeping with ankle pointed → can irritate Achilles

Small changes here can reduce irritation while strength builds.

Common Myths That Slow Recovery

Let’s clear a few up:

“I should stretch it more”
→ Stretching alone rarely fixes tendon pain — and can sometimes aggravate it.

“If it hurts, I’m damaging it”
→ Mild discomfort during rehab is often normal and safe.

“An injection will fix it”
→ May reduce pain short-term, but doesn’t improve tendon strength.

“I just need to rest longer”
→ This often makes the problem worse long-term.

The Bigger Picture: It’s Not Just About Exercise

Tendon pain is influenced by your whole system.

Things that matter more than most people realise:

Sleep quality
Stress levels
Overall activity levels
Strength training habits
Consistency (avoiding “all or nothing” cycles)

Even workplace habits can contribute — especially long periods of sitting followed by bursts of activity.

When Should You Get It Checked?

If you’ve had tendon pain for more than 2–3 weeks, it’s worth getting assessed.

Especially if:

Pain is worsening
It’s affecting your activity levels
It keeps coming back
You’re unsure what exercises to do

The earlier you address it, the quicker and easier it is to fix.

Final Thoughts: It’s About Load, Not Luck

Tendons are strong, adaptable tissues.

They’re designed to handle load — not avoid it.

Most tendon pain isn’t permanent damage.
It’s a signal that your tendon needs the right type of loading, at the right level, for the right amount of time.

Get that right, and tendons can recover remarkably well.

Need Help With Tendon Pain?

If you’re dealing with persistent pain in your knee, Achilles, shoulder, hip or elbow — and it’s not improving — I can help.

At Centre of Gravity Physiotherapy, I focus on:

Clear diagnosis (what’s actually going on)
Structured rehab plans
Strength-based recovery
Getting you back to doing what you enjoy

Book an appointment or get in touch to get started.

Tendon Pain Explained: Why It Happens and How to Fix It Properly