Why Does My Achilles Hurt When I Start Running?

Why Does My Achilles Hurt When I Start Running?

Achilles pain running is a common complaint among runners and active individuals. Many people notice discomfort in the back of the heel or tendon when they first begin running, which may gradually improve as they continue moving. This pattern often occurs when the Achilles tendon becomes irritated due to increased load.

The Achilles tendon connects the calf muscles to the heel bone and plays a critical role in running. Because it absorbs very high forces with each step, the tendon can become overloaded when training increases too quickly or recovery is insufficient.

At Sydney Physio Clinic, Achilles tendon pain is a frequent reason runners seek physiotherapy. Understanding why this occurs early in a run can help prevent symptoms from progressing into more persistent tendon injuries.

Why Achilles Pain Often Appears Early in a Run

Many runners report Achilles pain running during the first few minutes of exercise. This occurs because the tendon is suddenly exposed to repeated loading after a period of rest.

When the Achilles tendon has been inactive, it may temporarily stiffen. The first stages of running place rapid and repetitive forces through the tendon as the calf muscles contract to push the body forward.

This sudden load can trigger discomfort at the start of activity. In some cases the pain settles as the tendon warms up and becomes more flexible.

You may also notice similar symptoms first thing in the morning or after sitting for long periods. Our guide on Achilles pain after rest explains this pattern in more detail.

How Tendon Loading Affects Running

The Achilles tendon experiences very high loads during running. Each step can place forces several times body weight through the tendon.

If the tendon is well conditioned, it adapts to these loads. However, when training intensity increases too quickly, the tendon may struggle to tolerate the additional stress.

Small changes within the tendon structure can occur, which may lead to stiffness or soreness during activity.

This process is commonly associated with Achilles tendinopathy, a condition involving gradual tendon overload.

Training Errors That Trigger Achilles Pain

Many cases of Achilles pain running are linked to sudden changes in training.

Common triggers include:

• Rapid increases in running distance
• Adding speed work too quickly
• Running more hills than usual
• Switching to minimalist footwear
• Returning to running after a break
• Tight or fatigued calf muscles

When multiple training changes occur at once, the Achilles tendon may become overloaded.

Should You Stop Running Completely?

If you experience Achilles pain running, complete rest is not always necessary. In many cases the tendon responds well to temporary adjustments in training load.

Reducing running volume, avoiding hills, or replacing some sessions with low-impact activities can allow the tendon to settle while maintaining fitness.

However, if pain continues to increase during running or persists afterwards, further reduction in activity may be required until the tendon becomes less irritated.

Rehabilitation Principles for Achilles Tendon Pain

Rehabilitation focuses on gradually improving the tendon’s capacity to handle load.

This often includes progressive strengthening exercises for the calf muscles and Achilles tendon. These exercises help stimulate tendon adaptation and improve resilience.

Other components of rehabilitation may include:

• Calf strengthening exercises
• Gradual return-to-running programs
• Running technique assessment
• Ankle mobility exercises
• Load management strategies

Physiotherapy can help guide these stages to ensure the tendon is progressively challenged without becoming overloaded.

How Physiotherapy Can Help Runners

A physiotherapist can assess factors that contribute to Achilles pain running.

This may include evaluating:

• Calf muscle strength and endurance
• Running mechanics
• Foot posture and mobility
• Training patterns

At Sydney Physio Clinic, treatment plans are tailored to the runner’s training goals. Rehabilitation programs may include exercise therapy, movement retraining, taping techniques and load management strategies.

In persistent cases, treatments such as shockwave therapy may also be considered to support tendon recovery.

Simple Tips to Reduce Achilles Pain When Running

If you are experiencing Achilles pain running, several strategies may help reduce strain on the tendon.

• Reduce running distance temporarily
• Avoid hill running during recovery
• Warm up the calf muscles before running
• Gradually increase training load
• Perform regular calf strengthening exercises

These strategies help maintain activity while protecting the tendon from excessive stress.

Supports That May Help

Some runners find temporary support devices helpful while managing Achilles symptoms.

Examples include:

• Heel cups to reduce tendon strain
• Orthotic insoles to support foot mechanics
• Supportive running footwear

These supports may help reduce load through the Achilles tendon during running. However, strengthening exercises remain the most important part of recovery.

When to See a Physiotherapist

It may be helpful to seek professional advice if Achilles pain running persists.

• Pain lasts longer than two weeks
• Symptoms worsen during running
• The tendon becomes swollen or tender
• Running performance is affected

If symptoms continue, consider booking an assessment with a physiotherapist who can guide appropriate rehabilitation.

Frequently Asked Questions

Why does my Achilles hurt when I start running?

This often occurs because the tendon stiffens during rest and becomes sensitive when repetitive loading begins.

Is Achilles pain during running a sign of tendinopathy?

In many cases it can be an early sign of Achilles tendinopathy, particularly if symptoms occur consistently during activity.

Should I run through Achilles pain?

Mild discomfort may be manageable with reduced training load, but increasing pain should not be ignored.

Can tight calves cause Achilles pain?

Yes. Tight or overloaded calf muscles can increase strain on the Achilles tendon during running.

How long does Achilles tendon pain take to recover?

Recovery time varies depending on severity and training load. Many cases improve with strengthening exercises and gradual return to activity.

Summary

Achilles pain running commonly occurs when the tendon becomes overloaded during training. Symptoms often appear at the start of activity when the tendon is stiff and may improve as movement continues.

With appropriate load management, strengthening exercises and physiotherapy guidance, most runners can return to training safely.

This information is general in nature and does not replace individual medical advice. If symptoms persist, seek assessment from a qualified physiotherapist.