Achilles Tendonitis Exercises: A Gentle Loading Plan

The best achilles tendonitis exercises load the tendon slowly instead of resting it completely. Start with isometric calf holds, build to slow heavy calf raises, then add controlled heel drops, keeping pain at a mild 3 out of 10 or less and letting the tendon settle by the next morning.

As a NASM corrective exercise specialist, I see the Achilles treated like something fragile that needs to be wrapped up and left alone. Tendons actually respond to load. The trick is giving them the right amount, at the right speed, and building it up week by week.

What Achilles Tendonitis Really Means

The Achilles tendon connects your calf muscles to your heel bone. It’s the thickest tendon in your body, and it handles several times your body weight every time you walk, climb stairs or push off.

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When the load climbs faster than the tendon can adapt, it gets irritated and sore. Many clinicians now call it tendinopathy, because long-term cases are usually more about a tired, poorly organized tendon than true inflammation.

Common triggers include a sudden jump in walking or running, new hill work, a switch to flatter shoes, long gaps followed by a busy weekend, and calves that have lost strength over the years. Hormone shifts in midlife may also make tendons a little less forgiving.

Insertional vs Midportion: Why It Matters

Before you start, notice where it hurts. This one detail changes how you do the exercises.

Midportion pain sits roughly one to two and a half inches above the heel bone, in the cord of the tendon itself. It may feel thick or tender when you pinch it gently. This type usually tolerates heel drops off a step well.

Insertional pain sits right where the tendon attaches to the back of the heel bone. Deep ankle bending squeezes the tendon against the bone here, so dropping your heels below a step often makes it worse. Keep every exercise on a flat floor.

If you’re not sure which one you have, treat it as insertional and stay on flat ground. It’s the safer default, and a physical therapist can confirm it.

The Pain Rule for Tendons

Tendons can feel fine during exercise and grumpy the next day, so the morning after tells you more than the session itself. Use this simple guide.

1. Keep it at 3 out of 10 or less. Mild discomfort during the exercise is acceptable for a tendon. Sharp or rising pain is not.
2. Check the next morning. If your tendon feels no worse than usual the next morning, the load was right.
3. Back off one step if it flares. Drop the reps, the weight or the range, but don’t stop moving altogether.
4. Give it 48 hours between heavy days. Tendons rebuild between sessions, so heavy loading three times a week is plenty.

6 Achilles Tendonitis Exercises in Order

Work through these as stages. Stay on a stage until it feels easy and the tendon is calm the next morning, then move to the next.

1. Isometric Calf Hold

Stand facing a counter with your hands resting on it. Rise onto the balls of both feet about halfway up and hold that position without moving.

Hold for 30 to 45 seconds, rest for a minute, and do five rounds. As it gets easier, shift more weight onto the sore leg. Many people find their tendon feels calmer for a while afterwards.

2. Seated Calf Raise

Sit on a chair with your feet flat and your knees bent at a right angle. Rest a heavy bag or a few books on your thighs, then lift your heels slowly and lower them slowly.

This works the soleus, the deeper calf muscle that takes a big share of the load when you walk. Aim for three sets of 15, three seconds up and three seconds down.

3. Slow Double Calf Raise

Stand on a flat floor holding the counter. Rise up on both feet over three seconds, pause at the top, then lower over three seconds.

Do three sets of 15. If you have midportion pain and this feels easy, you can later move it to the edge of a step. Insertional folks stay on the floor.

4. Single-Leg Calf Raise

Once double raises feel easy, shift to one leg. Keep the same slow tempo and use the counter only for light balance, not to pull yourself up.

Build to three sets of 15 on each side. Your goal over time is to match the strong side, because a big gap between legs leaves the sore tendon doing extra work.

5. Eccentric Heel Drop

This is the classic midportion exercise. Stand on a step on the balls of both feet, rise up with both, then shift onto the sore leg and lower slowly over three to four seconds.

For midportion pain, let the heel sink a little below the step. For insertional pain, do the lowering on a flat floor and stop when your heel touches down. Start with two sets of 10 and build gradually.

6. Weighted Calf Raise

When single-leg raises feel solid, add load. Hold a dumbbell in one hand or wear a backpack with a few books inside, and keep the same slow tempo.

Heavy, slow loading is what helps the tendon get stronger for daily life. Three sets of 8 to 12 reps, three times a week, is a good target.

Achilles Tendonitis Exercises by Stage

Use this table to see where you are and what comes next. Most people spend one to three weeks on each stage.

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What About Stretching the Achilles?

Stretching feels good for many people, and a gentle calf stretch is fine for midportion pain. But stretching on its own rarely helps a tendon rebuild. Strength work does most of the heavy lifting.

If your pain is insertional, go easy. Deep stretches, especially with your heel dropped off a step, squeeze the tendon against the bone. Stick to light, short holds on flat ground, or skip them until the tendon settles.

If tight calves are part of your picture, my plantar fasciitis stretches include gentle wall calf variations that suit most people, and better ankle bend from these ankle mobility exercises can take extra pressure off the tendon.

Exercises to Avoid for Now

You don’t need to stop moving, but some activities ask more of the tendon than it can handle right now. Swap them out for a few weeks.

• Jumping and skipping. Box jumps, jump rope and plyometric classes load the tendon fast and hard.
• Sprinting and hill running. Both demand quick, springy push offs that a sore tendon often dislikes.
• Deep stretches off a step. Especially for insertional pain, hanging your heels low adds compression.
• Sudden jumps in walking volume. A long hike after a quiet month can undo good progress.

Good swaps include cycling, swimming, a rowing machine with easy foot pressure, upper body work and strength moves that keep your heels flat.

For general tendon support, you might also find my overview of collagen for tendon and ligament health useful alongside the loading plan.

When the Achilles Needs a Doctor First

Most Achilles pain improves with patient loading, but some signs need a proper check before you exercise. See a doctor or physical therapist if you notice any of these:

• A sudden pop, snap or a feeling of being kicked in the back of the heel. This needs urgent care the same day.
• You can’t rise up on your toes on that leg, or you can’t walk normally.
• A gap or dent you can feel in the tendon.
• Calf pain with swelling, warmth or redness, which needs urgent care because it can signal a blood clot.
• Numbness, tingling or burning in your foot.
• Pain at night or at rest that doesn’t ease.
• No improvement after several weeks of steady loading.

Some antibiotics in the fluoroquinolone family have been linked to tendon problems, so mention any recent prescriptions. If you have diabetes or poor circulation, get your feet checked before starting.

Quick Questions

Your This-Week Plan

1. Day 1: Work out whether your pain is midportion or insertional, then do five isometric calf holds.
2. Day 2: Repeat the holds and add three sets of seated calf raises.
3. Day 3: Isometric holds only, and check how your tendon feels first thing in the morning.
4. Day 4: Holds, seated raises and slow double calf raises on a flat floor.
5. Day 5: Isometric holds only, plus an easy walk or bike ride.
6. Days 6 and 7: Repeat Day 4 on Day 6, rest on Day 7, and note whether you’re ready to move up a stage next week.

This guide is part of my foot, ankle and plantar fasciitis guide, where you’ll find routines for heel pain, stiff ankles and stronger feet. For more lower leg strength, the ankle strengthening exercises pair well with this plan.

The Bottom Line

Achilles tendonitis exercises work because tendons rebuild when you load them slowly and steadily. Start with isometric holds, progress to slow calf raises, then heel drops and weighted raises, matching the range to where your pain sits.

Be patient, follow the morning-after rule, and give it a few months. A strong calf and a well-loaded tendon are your best protection against the next flare.

This article is for general education and isn’t medical advice. If you felt a pop or snap in your heel, can’t rise onto your toes, or have calf swelling and warmth, get urgent care before trying these exercises. See your doctor or a physical therapist if pain follows an injury, comes with numbness or fever, or isn’t improving, and stop any move that causes sharp pain.