How to Treat Achilles Tendonitis: The Exercise-First Approach That Works

If you've been told to rest, ice, and take anti-inflammatories for your Achilles, you've been given the standard advice. And there's a reason so many people end up back in the same clinic six months later: that advice treats the symptom, not the problem.

The evidence-based treatment for Achilles tendinopathy isn't complicated — but it does require a shift in thinking. The goal is not to reduce pain. The goal is to build a tendon that can handle your life. Here's exactly how to do that.

Step 1: Understand the Problem Before You Fix It

Achilles tendinopathy is a load-tolerance problem. Your tendon has been exposed to more demand than it currently has the capacity to handle. The treatment, therefore, is progressive loading — gradually exposing the tendon to increasing stress until its capacity exceeds your daily demands.

The first step is to identify and temporarily reduce the activities that are provoking the most pain. This doesn't mean stopping all movement — it means buying the tendon a little space while you start building capacity from below.

Step 2: Start With Isometric Heel Raises

Isometric exercises involve contracting the muscle without moving the joint. For the Achilles, this means holding a raised heel position with significant weight for 30–45 seconds at a time.

Research shows isometrics have an immediate analgesic effect on tendon pain — they actually reduce pain while you're doing them and for some time afterward. They're also a safe starting point for irritable tendons that aren't ready for dynamic loading.

• Rise up onto your toes (both feet to start, then progress to single leg)
• Hold for 30–45 seconds with significant calf activation
• Rest for 2 minutes. Repeat 4–5 times.
• Perform once or twice daily

Step 3: Progress to Heavy Slow Resistance Loading

Once the tendon is less irritable (usually 1–2 weeks in), the main driver of recovery is heavy slow resistance (HSR) loading — slow, controlled eccentric-concentric heel raises with progressive weight added over time. This is the intervention with the strongest evidence base across multiple research trials.

• Slow heel raise on a step: 3 seconds up, 2 seconds hold, 3 seconds down
• Start with body weight, progress with a loaded backpack, weight vest, or barbell
• 3 sets of 15 reps, progressing to 3 sets of 6–8 reps with heavy load
• Every other day — tendons need 48 hours between loading sessions to adapt
• Expect some tendon discomfort — 3–4/10 is acceptable; above that, reduce load

"Midportion and insertional Achilles tendinopathy require slightly different heel raise variations. For insertional cases, avoid deep heel drop below the step level — this compresses the insertion point and often worsens symptoms."

Step 4: Progress to Functional and Sport-Specific Loading

As capacity builds, the programme should progressively advance toward the demands of your actual life or sport. For runners, this means a structured return-to-run protocol. For the general population, it means building tolerance to prolonged walking, stairs, and inclines.

The final phase introduces energy-storage demands — calf raises at speed, hopping, jumping — to prepare the tendon for the spring-like loading of sport and brisk activity.

What Else Helps?

• Footwear: a temporary heel lift (1–1.5 cm) can reduce load on a very irritable tendon.
• Load monitoring: use a simple 0–10 pain scale to guide day-to-day decisions. If pain is above 4/10 or not settling within 24 hours, reduce load.
• Sleep and nutrition: tendons adapt best in a well-recovered body. Adequate protein intake and sleep support the process.

Frequently Asked Questions

Should I use ice or heat on my Achilles?

Ice can temporarily relieve discomfort after activity but doesn't treat the underlying issue. Heat before activity may be helpful to improve tissue extensibility. Neither is a primary treatment — don't spend more time on this than on your loading programme.

How many times a week should I do Achilles exercises?

Isometric exercises can be done daily. Heavy slow resistance loading should be done every second day — tendons need 48–72 hours to respond to a loading stimulus. Doing too much too soon is one of the most common mistakes.

Can I keep doing cardio while treating my Achilles?

Usually yes. Swimming, cycling, and pool running are low-tendon-demand alternatives that maintain cardiovascular fitness without provoking the Achilles. Walking is generally fine at a comfortable volume. Running should be managed carefully based on symptom response.

For a more detailed breakdown of the heel raise protocol — including which variation is right for your type of Achilles tendinopathy — the step-by-step loading guide covers every phase. Or book a session if you'd like a personalised plan built around your specific situation.