Achilles pain is one of the most common complaints we see in runners of all levels. You might notice it as a dull ache after a long run, a tight sensation in your calf, or even a sharper pain when pushing off your toes. Experiencing soreness in your Achilles tendon after running can be frustrating, and it often raises the question: “Is this just normal post-run soreness, or is something more serious happening?”
Understanding the difference between typical post-run discomfort and signs of injury is the first step in preventing a small niggle from turning into a chronic problem.
At our clinic, our mission is to build resilient athletes, ensuring that every runner, professional or otherwise, has the capacity to handle their training load.
Common Causes of Achilles Pain in Runners
Through our work with professional sports teams and running clubs, we have identified four primary drivers of Achilles issues:
1. Achilles Tendinopathy
This is a condition caused by repetitive overload that leads to changes in the tendon’s internal structure. Unlike simple inflammation, tendinopathy is often a failure of the tendon to adapt to the physical demands placed upon it.
A smarter question that we strive to answer in the Initial Physiotherapy Assessment at ProSport Physiotherapy is what caused this overload in the first place? Often, from our experience, it is somewhere else in the body not doing enough work.
2. Calf Tightness and Muscle Imbalance
When the gastrocnemius and soleus muscles feels overly tight, this can be a sign the Achilles tendon may be forced to endure excessive tension. During our clinical assessments, we frequently find that weakness in the deeper calf muscles (the soleus) or further up the chain (the hamstrings load tolerance capability) is a hidden contributor to tendon overload.
3. Sudden Load Increases (“Too Much, Too Soon”)
The Achilles acts like a high-performance spring. If you ramp up your intensity or mileage too quickly, the “spring” cannot recover at the same rate. This is the most frequent cause of injury we treat in athletes training for their first major marathon or triathlon.
4. Overuse and Recovery Gaps
The Achilles tendon handles 5–7 times your body weight with every single stride. Without adequate recovery windows, the tissue enters a state of “maladaptation,” leading to that persistent post-run ache.
When Soreness Is Normal And When It’s Not
A little soreness in the Achilles after a run can be normal, especially if you’ve increased mileage, added hills, or done more intervals than usual. This type of discomfort usually fades within 24–48 hours and doesn’t interfere with your running mechanics.
Some people will experience discomfort when they ‘pinch their tendon together’ but maybe absolutely fine when running so don’t let the palpation sign alone worry you.
However, it signals a potential injury if:
- The pain is sharp or localised to a specific point on the tendon with movement.
- You experience significant stiffness first thing in the morning.
- You notice visible swelling or a “thickened” appearance to the tendon.
Is it Normal for the Achilles to be Sore After Running?
Typical post-run soreness usually:
- Dissipates within 24–48 hours.
- Improves as you move or “warm up” during light activity.
- Does not alter your running mechanics or cause you to limp.
How Physiotherapy Can Help
Early intervention is the difference between a one-week training adjustment and a six-month recovery programme from our extensive experience dealing with these injuries. Our Resilient Athlete approach to Achilles pain running issues combines clinical expertise at the finding what is not doing enough work (the root cause) with evidence-based loading protocols used in professional sport to settle the symptoms (the Achilles tendon).
In our clinic, an assessment involves mapping out your training and injury history for clues, analysing your gait, bespoke movement coordination assessments and specific tendon capacity tests.
We don’t just treat the pain; we treat the athlete. This philosophy is the core of our work and is explored in detail in our book, The Resilient Athlete, which provides a comprehensive roadmap for managing load and preventing injury.
Hands-on treatment, including sports massage, can reduce tissue tension and improve mobility, while tailored exercises retrain your tendon and calf muscles to handle running loads efficiently.
Two exercises we commonly prescribe after we settle the symptoms are:
- Exercise: Achilles Loading – Midstance
Objective: To train your Achilles tendon to efficiently lengthen while the surrounding calf muscles work isometrically, replicating the crucial midstance phase of running and jumping. - Exercise: Achilles Loading – Latestance
Objective: To train your Achilles tendon and calf muscles to coordinate efficiently in a hip-extended position, mimicking the powerful late stance phase of running and jumping.
Both exercises focus on rebuilding tendon resilience and improving coordination between your calves and Achilles, helping prevent recurring pain.
Take Action: You can explore our full library of demonstration videos on our Achilles Rehab Exercises Page or use our Online Self-Assessment Tool to see if your symptoms require professional intervention.
Preventing Achilles Pain From Returning
Recovery doesn’t end when the pain subsides. Gradual load progression, calf flexibility, adequate Soleus and Hamstring load tolerance and strengthening through controlled exercises are essential for prevention. Maintaining good running mechanics (by all the muscles doing their jobs), avoiding sudden spikes in training, and incorporating adequate recovery all reduce the chance of recurring Achilles issues.
Regular check-ins with a physiotherapist can help you monitor tendon health and address small issues before they become major setbacks. If your Achilles pain persists, consider booking a physiotherapy assessment at our clinic to get a structured plan tailored to your body and running style.
When to Seek Help
You should seek professional assessment if you experience:
- Pain that worsens during or after running
- Swelling or visible thickening of the tendon
- Difficulty pushing off your toes or performing calf raises
- Persistent soreness beyond a couple of days
Early attention not only speeds recovery but also prevents chronic problems that can sideline your training for weeks or months. Our goal is to get you back to your sport stronger than you were before the injury and turn you into The Resilient Athlete.
Achilles pain doesn’t have to control your running. With the right assessment, targeted exercises, and load management strategies, you can return to running stronger, pain-free, and more resilient. Start with a self-assessment, try our carefully designed rehab exercises, or book a physiotherapy session today to take the first step toward a healthy Achilles tendon.