Achilles Tendinitis Exercises: Heal Your Tendon and Return to Activity

That nagging pain at the back of your ankle. The stiffness when you first get out of bed. The ache that warms up during activity but returns with a vengeance afterward. Achilles tendinitis is one of the most common—and most stubborn—overuse injuries.

The Achilles tendon connects your calf muscles to your heel and handles enormous forces with every step, jump, and push-off. When it becomes irritated and painful, it affects everything you do on your feet.

The good news: Achilles tendinitis responds well to the right exercise approach. The key word is "right"—generic stretching and rest often aren't enough. Let's get you on the path to recovery.

Understanding Achilles Tendinitis

Achilles tendinitis (or tendinopathy) is an overuse injury where the tendon becomes irritated, often developing microscopic damage that doesn't heal properly. It typically presents in two locations:

Midportion tendinitis: Pain 2-6 cm above where the tendon attaches to the heel. Most common type.

Insertional tendinitis: Pain where the tendon attaches to the heel bone. Often associated with a bump (Haglund's deformity) or bone spurs.

The treatment approach differs slightly depending on location, which we'll address.

Why Traditional Rest Doesn't Work

Complete rest feels logical—if the tendon is injured, stop using it. But tendons need load to heal properly. Complete rest leads to:

• Decreased tendon strength
• Reduced blood flow
• Loss of the tendon's ability to handle stress

The solution isn't rest OR activity. It's the right kind of activity at the right intensity—progressive loading that stimulates healing without causing further damage.

The Cornerstone: Eccentric Exercises

Eccentric exercises—where the muscle lengthens under load—are the gold standard for Achilles tendinitis. They've been studied extensively and consistently outperform other treatments.

Eccentric Heel Drops (Alfredson Protocol)

This is the most researched exercise for midportion Achilles tendinitis.

On Flat Ground (Starting Point):

1. Stand on both feet, rise up onto your toes
2. Shift your weight to the affected leg
3. Slowly lower your heel to the ground over 3-5 seconds
4. Use both legs to rise back up
5. Repeat

On a Step (Standard Protocol):

1. Stand on a step with the balls of your feet on the edge, heels hanging off
2. Rise up on both feet
3. Shift weight to the affected leg
4. Slowly lower your heel below the level of the step (3-5 seconds)
5. Use both legs to return to the starting position
6. Repeat

The Protocol:

• 3 sets of 15 repetitions, twice daily
• Do both with knee straight (targets gastrocnemius) and knee slightly bent (targets soleus)
• That's 180 total repetitions per day
• Continue for 12 weeks

Important: Some discomfort during the exercise is acceptable and expected. Stop if pain is severe (above 5/10) or if pain worsens significantly the next day.

Modified Approach for Insertional Tendinitis

The standard heel drop (letting the heel drop below the step) can aggravate insertional tendinitis by compressing the tendon against the heel bone.

Modification:

• Perform eccentric heel drops on flat ground only
• Don't let the heel drop below the level of the floor
• Focus on the lowering phase from tiptoe to flat foot

Stretching Exercises

Gentle stretching complements strengthening but shouldn't be the primary treatment.

Gastrocnemius Stretch

1. Stand facing a wall, hands on the wall
2. Step one foot back, keeping it straight with heel down
3. Bend your front knee and lean forward
4. Feel the stretch in your upper calf
5. Hold 30-45 seconds, repeat 3 times each side

Soleus Stretch

1. Same position as above
2. Bend the back knee while keeping the heel down
3. Feel the stretch in your lower calf, closer to the Achilles
4. Hold 30-45 seconds, repeat 3 times each side

Plantar Fascia Stretch

Tightness in the plantar fascia can contribute to Achilles problems.

1. Sit and cross the affected foot over your opposite knee
2. Pull your toes back toward your shin
3. Feel the stretch along the bottom of your foot
4. Hold 30 seconds, repeat 3 times

Note for insertional tendinitis: Aggressive stretching that puts the ankle in extreme dorsiflexion (toes pulled toward shin) can aggravate symptoms. Stretch gently.

Progressive Loading Program

Beyond eccentric exercises, progressive loading helps the tendon adapt to increasing demands.

Phase 1: Isometrics (Week 1-2, if very irritable)

If your tendon is too irritated for eccentrics initially:

1. Stand on both feet
2. Rise onto your toes
3. Hold for 30-45 seconds
4. Lower on both feet
5. Repeat 4-5 times, 2-3 times per day

Isometric holds can reduce pain and prepare the tendon for eccentric loading.

Phase 2: Eccentric Loading (Weeks 2-12+)

The Alfredson protocol described above. This is the main treatment phase.

Phase 3: Heavy Slow Resistance (Alternative or Addition)

Some research suggests heavy, slow resistance training is equally effective and may be more practical:

Seated Calf Raise (Machine or Weight on Knees):

1. Sit with weight on your thighs, balls of feet on a raised surface
2. Lower your heels slowly (3 seconds down)
3. Raise slowly (3 seconds up)
4. 3 sets of 15 reps
5. Increase weight as tolerated over time

Standing Calf Raise (Weighted): Same slow tempo with added weight (dumbbells, barbell, machine).

Phase 4: Energy Storage Exercises (Weeks 8-12+)

Once pain is minimal, prepare the tendon for dynamic activities:

Double-Leg Hops:

1. Small hops in place, landing softly
2. 3 sets of 10-15 hops
3. Progress to single-leg when ready

Jump Rope: Start with short intervals, progress duration gradually.

Skipping/Bounding: Light plyometric movements to prepare for running.

Sample Weekly Program

Weeks 1-2 (Acute/Irritable)

• Isometric calf holds: 5 × 30-45 seconds, twice daily
• Gentle stretching: gastrocnemius and soleus, 3 × 30 seconds each
• Ice after activity if needed
• Relative rest from aggravating activities (can cross-train with swimming, cycling)

Weeks 3-8 (Eccentric Loading)

Daily (twice per day):

• Eccentric heel drops (knee straight): 3 × 15
• Eccentric heel drops (knee bent): 3 × 15

Daily:

• Stretching: all calf stretches, 2 × 30 seconds each
• Ice if needed post-exercise

3x per week:

• Additional calf strengthening (seated calf raises): 3 × 12-15

Weeks 9-12+ (Progressive Loading)

Daily:

• Eccentric heel drops: 3 × 15 (can reduce to once daily if improving)

3x per week:

• Heavy slow resistance calf raises: 3 × 10-12
• Single-leg balance: 3 × 30 seconds each leg
• Begin hop progressions if pain-free

Return to Running Phase

• Walk-run progression (similar to shin splints protocol)
• Continue maintenance strengthening 2-3x per week
• Gradual increase in running volume (10% per week maximum)

Adjunct Treatments

Foam Rolling and Self-Massage

Roll your calves (not directly on the tendon) to release tension:

1. Sit with calf on foam roller
2. Roll slowly from ankle to knee
3. Pause on tender spots
4. 2-3 minutes per leg

Heel Lifts

A temporary heel lift (1/4 to 1/2 inch) in your shoe can reduce tendon strain during the acute phase. Gradually remove as symptoms improve.

Night Splints

Wearing a night splint that keeps your ankle in slight dorsiflexion can reduce morning stiffness.

Footwear

• Supportive shoes with some heel elevation
• Avoid completely flat shoes and going barefoot during recovery
• Replace worn-out athletic shoes

Common Mistakes

Pushing through severe pain: Some discomfort is acceptable; severe pain is not. If exercises cause pain above 5/10, reduce intensity or volume.

Not doing enough volume: The research protocols are high volume (180 reps/day) for a reason. Doing 20 calf raises occasionally won't cut it.

Stopping too soon: Tendon healing takes time—typically 12 weeks minimum. Stopping when pain improves often leads to recurrence.

Aggressive stretching: Especially with insertional tendinitis, overstretching can aggravate the condition.

Complete rest: Avoiding all activity leads to weaker tendons that are more prone to re-injury.

Returning to sport too quickly: Gradual progression is essential. Jumping back to full activity invites recurrence.

Timeline Expectations

Weeks 1-4: Pain may initially stay the same or slightly increase as you begin loading. This is normal.

Weeks 4-8: Gradual improvement in symptoms. Morning stiffness decreases.

Weeks 8-12: Significant improvement. Can begin more dynamic activities.

Weeks 12+: Return to full activity for many people. Some cases take longer.

3-6 months: Complete resolution for most cases with consistent treatment.

Chronic cases (symptoms longer than 3 months before treatment) may take longer to resolve.

When to Seek Professional Help

See a healthcare provider if:

• Pain is severe or came on suddenly (possible rupture)
• You felt or heard a "pop" (possible rupture)
• Significant swelling or bruising
• No improvement after 4-6 weeks of consistent exercise
• Pain prevents walking normally
• You're unsure of your diagnosis

Additional treatments that may help:

• Physical therapy for hands-on treatment and personalized programming
• Shockwave therapy (ESWT)
• Injections (PRP, other biologics—avoid corticosteroid injections in the Achilles)
• In rare cases, surgery

Prevention

Once recovered, maintain tendon health:

• Continue calf strengthening: 2-3 times per week as maintenance
• Progress training gradually: Avoid sudden spikes in activity
• Warm up properly: Include calf raises and dynamic stretching
• Maintain flexibility: Regular calf stretching
• Listen to your body: Early warning signs mean reduce load, not push through

The Path Forward

Achilles tendinitis is frustrating because it's slow to heal. But the evidence is clear: progressive loading, centered on eccentric exercises, works for most people.

Commit to the program. Do the repetitions. Be patient with the timeline. Your tendon is adapting, rebuilding, and getting stronger—even when you can't feel it yet.

Twelve weeks feels like forever when you're injured. But it's a small investment for a lifetime of healthy, pain-free movement.

Your Achilles will thank you.