Achilles Tendonitis Exercises: 2 Safe Starter Moves (Plus the Rules to Stop Flares)

Achilles tendonitis exercises are one of the most effective ways to calm an irritated tendon and rebuild its strength. But many runners accidentally make their symptoms worse by starting the wrong exercises or doing too much too soon.

The Achilles tendon is the hardest‑working tendon in your body. With every step it helps lift your body and propel you forward, and during running it can experience forces of up to eight times your bodyweight. That workload means it adapts well to the right training — but it also becomes stiff and sore when overloaded.

The good news is that most Achilles tendon pain improves when the tendon is loaded gradually and consistently.

In this guide, you’ll learn two safe exercises many people can start with immediately. More importantly, you’ll learn the three pain rules that stop those exercises from backfiring.

If you follow these rules, you’ll give your tendon the best chance to settle down and start adapting again.

Quick Answer: Do Achilles Tendonitis Exercises Actually Help?

Yes — for most people, strengthening exercises are the most effective treatment for Achilles tendinopathy.

But exercises only help when the load placed on the tendon matches its current capacity.

Too little load and the tendon doesn’t adapt.

Too much load and the tendon becomes irritated.

The goal of Achilles rehab is simple:

Increase the tendon’s capacity while avoiding overload.

The exercises below are a safe place to start.

The Achilles Tendon Paradox

Here’s something that surprises many runners.

The fastest way to get rid of Achilles pain is usually not resting it completely.

In fact, long periods of rest can sometimes make the tendon more sensitive.

Achilles tendons actually respond best to gradual loading. When exposed to the right level of resistance training, the muscles and tendons become stronger and more capable of handling daily stress.

So while it might seem logical to avoid using the tendon at all, the real solution is usually to load it carefully and consistently.

The trick is knowing how much load is helpful — and when you’re doing too much.

That’s where the three pain rules come in.

The 3 Achilles Pain Rules That Stop Exercises Backfiring

If you search online for Achilles exercises, you’ll find dozens of different programs.

But the real key isn’t just which exercise you do.

It’s how you interpret the signals your tendon sends you while doing them.

These three rules help you understand those signals.

Rule #1: The 3/10 Pain Radar

During Achilles exercises, some discomfort is normal.

As a guide:

0–3 / 10 pain = acceptable

This might feel like:

• mild ache• tendon awareness• muscle fatigue

These are often signs the tendon is being loaded appropriately.

However:

4 / 10 or higher = stop the set.

This doesn’t mean you’ve injured the tendon. It simply means the exercise exceeded what your tendon could tolerate today.

Rule #2: The Morning Scorecard

Your Achilles tendon tells the truth the next morning.

Morning stiffness is often the clearest indicator of whether yesterday’s loading was appropriate.

Think of it as a simple traffic light system.

Green lightMorning stiffness is the same or improving → continue exercises.

Yellow lightStiffness is noticeably worse → hold your current exercise level.

Red lightPain or stiffness clearly worse for several mornings → reduce load temporarily.

One slightly bad morning is often noise. Several in a row is a message.

Rule #3: Good Sore vs Bad Sore

After exercises, muscles often feel tired or warm.

This is good sore.

Warning signs of overload include:

• sharp tendon pain• pinching near the heel bone• limping• pain escalating during the day

If discomfort shifts from good sore to bad sore during a set, that set is finished.

Exercise #1: Isometric Calf Raise Hold

Isometric exercises load the tendon without much movement, which makes them a safe place to start.

How to do it

1. Stand with both feet on the ground.
2. Slowly rise onto the balls of your feet.
3. Hold the position.

If that feels comfortable, you can gradually shift more weight onto the affected leg.

How long

Aim for:

30–45 second holds

Repeat 4–5 times, resting between holds.

What it should feel like

You may feel:

• calf muscle effort• mild tendon pressure

These are acceptable.

Stop if you feel sharp pain or discomfort above the 3/10 rule.

Exercise #2: Slow Controlled Calf Raises

Once the tendon tolerates isometric holds, slow calf raises help build strength and control.

How to start

1. Stand with both feet on the ground.
2. Slowly rise onto your toes.
3. Slowly lower back down.

Move slowly.

A good rhythm is:

3 seconds up, 3 seconds down.

Starting volume

Begin with:

2–3 sets of 6–8 repetitions.

Technique tips

• Keep your knee straight.• Push through the big toe.• Avoid twisting the heel as you rise.

Quality matters more than quantity.

How Often Should You Do Achilles Exercises?

For many people, exercises are best performed every second day.

This allows the tendon to adapt while still receiving consistent loading.

Many successful rehabilitation programs use a structure like:

• 3 sessions per week• multiple sets per session

Consistency matters more than intensity.

What To Avoid While Your Achilles Is Irritated

When the tendon is reactive, certain activities commonly make symptoms worse.

Try to temporarily avoid:

• aggressive calf stretching• hill running• sprinting or speed work• jumping or plyometrics

These activities place rapid or compressive loads through the tendon that it may not yet tolerate.

Insertional vs Mid‑Portion Achilles Pain

Achilles pain can occur in different locations, and this affects how exercises should be performed.

Mid‑portion pain

Pain sits 2–6 cm above the heel bone.

These tendons often tolerate a slightly larger range of movement during exercises.

Insertional pain

Pain sits right where the tendon attaches to the heel bone.

Early exercises should avoid dropping the heel below floor level, as this can compress the tendon.

How Long Do Achilles Exercises Take To Work?

Tendons adapt slowly.

A typical timeline looks like this:

Week 1–2Pain begins to settle

Week 3–6Strength and tolerance improve

Week 6–12Gradual return to higher activity levels

Progress may feel slow, but consistent loading usually produces steady improvement.

If Running Is Causing Achilles Pain

Achilles problems in runners are usually caused by a mismatch between training load and tendon capacity.

Common triggers include:

• sudden mileage increases• adding hill sessions• introducing speed work

Reducing speed and hills while maintaining controlled loading exercises often allows the tendon to recover.

Footwear Can Reduce Achilles Strain

Shoes can play an important role in managing tendon load.

Features that tend to reduce strain include:

• a higher heel‑to‑toe drop• a stable forefoot

Many runners with Achilles symptoms feel better in shoes with 8–12 mm drop rather than flat or minimalist footwear.

When Should You Get Achilles Pain Checked?

Professional assessment may help if:

• symptoms persist longer than six weeks• progress plateaus despite exercise• pain becomes sharp at the tendon insertion• both Achilles tendons become painful

An assessment can clarify diagnosis and help guide the next stage of loading.

Want the Full Achilles Rehab Plan?

The exercises above are a safe starting point, but most Achilles rehabilitation progresses through several stages as the tendon adapts.

If you’d like the full step‑by‑step process, including how to progress exercises safely and return to running, you can start with our free Tendon Time email series.

Each lesson explains a key concept behind tendon recovery and guides you through the next steps.

About the Author

Tim Mulholland is a Melbourne-based podiatrist, runner, and clinical educator at La Trobe University. He is the founder of Pride Podiatry, where he works extensively with runners and active adults experiencing Achilles tendinopathy and other lower-limb injuries.

Over the past decade Tim has assessed and treated thousands of patients while also teaching the next generation of podiatrists at university level. His clinical approach focuses on load management, strength-based rehabilitation, and helping people return to the activities they love.

Tim has also personally rehabilitated his own Achilles tendinopathy using the same principles he teaches patients.

He created the Tendon Time education series and the Achilles Load Map to give runners and active people a clear framework for understanding tendon pain, progressing exercises safely, and avoiding the common mistakes that slow recovery.

Achilles Tendonitis Exercise FAQ

Should I stretch my calves?

Stretching often provides temporary relief, but aggressive stretching early in rehabilitation can irritate some Achilles tendons.

Strengthening exercises are usually more effective in the early stages.

Can I keep running?

Sometimes. If pain during running stays below the 3/10 rule and morning stiffness remains stable, reduced running may still be possible.

Speed work and hills often need to pause temporarily.

Do eccentric exercises still work?

Yes. Eccentric loading programs have strong evidence, but many modern approaches now combine slow strength training and other loading strategies.

How long does Achilles tendinopathy take to recover?

Most people see improvement within several weeks, but full tendon adaptation can take a few months.

Consistency is the most important factor.

If you’d like help applying these principles to your own recovery, you can also book an appointment with the team at Pride Podiatry.