How do I prevent Achilles tendinopathy and rupture?

The Achilles is the strongest tendon in the body, but jump training loads it heavily. Tendinopathy prevention: 1. Progressive load — weekly volume +≤10%. 2. Isometrics — calf-raise peak holds 3×45s, 3-4x/week (O'Neill et al., 2019). 3. Ankle mobility — limited dorsiflexion ( 30 min), mid-tendon thickening + pain, abnormal ultrasound structure, or a sudden 'kicked in the heel' feeling with a visible gap — that's an emergency, get surgery.

Back to the Jump Encyclopedia

REHAB & INJURY PREVENTION

Achilles Tendinopathy and Rupture: Prevention Guide

The strongest tendon in the body is also heavily loaded by jumping. Here is the prevention checklist and the rupture warning signs that are an emergency.

August 5, 20267 min readEvidence-Based & Reviewed

📌Part of our comprehensive pillar series: Jump Injury Prevention & Rehab Guide

Read pillar guide

The Achilles is the strongest tendon in the body — but jump training loads it heavily and repeatedly. Prevention is straightforward; rupture is catastrophic and partly predictable.

The Achilles tolerates huge loads but adapts slowly. Prevention is essentially volume management plus regular loading at the right intensity — the same two levers as every other tendon.

Achilles tendon health and stiffness protocol: calf raise peak isometrics, Alfredson eccentric heel drops, ankle mobility, and rupture red flags

Tendinopathy prevention

Five habits that protect the Achilles:

Progress load gradually — weekly volume no more than +10%.
Add isometrics: calf-raise peak holds 3×45s, 3–4 times per week.
Maintain ankle mobility — limited dorsiflexion (under 10 cm knee-to-wall) is a risk factor.
Avoid weekend-warrior spikes in volume.
Use eccentrics: straight- and bent-knee slow lowers with 3–4 second lowering.

Rupture warning signs

Persistent morning stiffness over 30 minutes, mid-tendon thickening with pain, or abnormal ultrasound structure all deserve assessment. A sudden 'kicked in the heel' feeling with a visible gap is a rupture — that is an emergency and requires immediate surgical evaluation.

Why eccentric loading works

The Alfredson heel-drop protocol — slow, loaded eccentric lowering — has the strongest evidence base in conservative treatment of mid-portion Achilles tendinopathy, with benefits maintained at five-year follow-up.

Recent trials also show that a combined concentric-eccentric program (Silbernagel) produces similar clinical outcomes at one year. The practical conclusion: progressive loading works, and the best program is the one you can adhere to.

A practical prevention program

A weekly tendon-maintenance template:

Isometrics 3–4×/week: calf-raise peak holds 3×45 seconds.
Eccentrics 2×/week: straight- and bent-knee slow lowers, 3–4 second lowering.
Ankle mobility: knee-to-wall distance at least 10 cm.
Volume control: no more than +10% weekly jump volume.
Surface control: avoid large volumes on concrete.

Reactive tendon vs rupture risk

Morning stiffness that lasts more than 30 minutes, thickening at mid-tendon, and pain that persists after warm-up are warnings, not normal aging. A sudden 'kicked in the heel' sensation with a visible gap is a rupture — emergency evaluation, not stretching.

Key takeaways

Volume jumps of ≤10% per week protect the tendon.
Isometrics and slow eccentrics build capacity.
Morning stiffness, thickening and pain are warnings; a sudden gap is an emergency.
Eccentrics and isometrics both build capacity; the best program is the one you will do.
Morning stiffness over 30 minutes is a warning sign, not normal aging.