Patient Education Guide
Tendon Rehabilitation — Why Loading Works
Understanding tendinopathy and the evidence-based path to recovery
This Guide Applies To
Achilles tendinopathy
Patellar tendinopathy
Gluteal tendinopathy
Rotator cuff tendinopathy
Proximal hamstring tendinopathy
De Quervain's (wrist)
What Is Tendinopathy?
Tendinopathy is a breakdown in the tendon's structure caused by load that exceeds its capacity to repair. It is not primarily an inflammatory condition — which is why it is now called tendinopathy rather than "tendinitis."
Because inflammation is not the dominant issue, anti-inflammatory treatments (ice, NSAIDs, cortisone injections) provide only short-term symptom relief at best, and do not address the underlying structural problem. Cortisone injections in particular can weaken the tendon if used repeatedly.
The most important thing to understand about tendons
Tendons are mechanosensitive — they adapt to load. When load is removed, they do not heal. They weaken. Rest alone will not fix tendinopathy. Progressive loading is the treatment.
The Three-Stage Loading Progression
1
Isometrics
Weeks 1–4
Sustained muscle contraction with no joint movement. Provides immediate pain relief and begins tendon loading safely.
2
Heavy Slow Resistance
Weeks 4–12
Moving slowly through range under significant load. Rebuilds tendon structure and capacity. The core of tendon rehab.
3
Progressive Sport Loading
Weeks 12–16+
Higher velocities, plyometrics, sport-specific demands. Prepares the tendon for return to full activity.
A 2024 network meta-analysis (Heliyon) found that eccentric exercise alone — the long-standing standard — was the least effective approach for patellar tendinopathy. Isometrics combined with heavy slow resistance produced the best outcomes.
Managing Pain During Rehab
Some pain during loading is normal and acceptable. Use this guide:
- 0–3/10 pain during exercise: Continue. This is acceptable loading.
- 4–5/10 pain during exercise: Reduce load or slow down. Do not push through.
- Pain settles within 24 hours after exercise: Good sign — load was appropriate.
- Pain worse the next day than during exercise: Load was too much — reduce for the next session.
Dos and Don'ts
Do
- Load progressively and consistently
- Monitor your 24-hour response to exercise
- Warm up before exercise — tendons respond better when warm
- Maintain your general fitness (swim, cycle) during rehab
- Tell your physio if your pain pattern changes significantly
- Be patient — full tendon recovery takes 12–16 weeks minimum
Don't
- Rest completely for weeks — this weakens the tendon
- Rely on ice or NSAIDs as primary treatment
- Stretch an irritated tendon aggressively — this can aggravate it
- Return to full sport before completing the loading progression
- Expect a cortisone injection to fix the problem long-term
- Compare your timeline to someone else's — tendons vary significantly
Why This Takes Time
Tendon tissue has a limited blood supply and regenerates slowly. Structural changes from the loading programme take 6–12 weeks to become measurable and 12–16 weeks to produce meaningful functional improvement. Symptom improvement often lags behind structural improvement — meaning the tendon may be rebuilding capacity even when it still feels sore.
This is why consistency matters more than intensity. Showing up and doing the programme — even on days when it feels frustrating — is what drives the result.