Tendon Injury Rehabilitation
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Direct answer
Degeneration, not inflammation, is the pathology in most persistent tendon pain — hence the modern term tendinopathy replacing tendinitis. The Cook and Purdam continuum describes reactive tendinopathy (acute overload, thickened, load-sensitive, reversible), reactive-on-degenerative (the common adult presentation) and degenerative tendinopathy (chronic structural change, largely irreversible but still load-trainable). Rehabilitation is staged loading rather than rest: isometric holds (classically 5 repetitions of about 45 seconds at moderate-to-high intensity) for analgesia and capacity, then heavy slow resistance and eccentric loading — the Alfredson Achilles protocol of 3 sets of 15 eccentric heel drops, twice daily for 12 weeks, remains the reference standard — then energy-storage and plyometric work before return to sport. Corticosteroid injection buys short-term relief at the cost of worse long-term outcomes and rupture risk in loaded tendons, and imaging findings correlate poorly with pain, so treatment follows the patient, not the scan.
What you must remember
- Continuum (Cook and Purdam): reactive — a short-term adaptive response to overload in a young or abruptly up-trained tendon; reactive-on-degenerative — the typical 25-45-year-old clinic presentation; degenerative — chronic, structurally disorganised, commonest in older athletes; management differs by stage.
- Alfredson protocol (mid-portion Achilles tendinopathy): 3 × 15 eccentric calf drops off a step, knees straight and bent, twice daily, 12 weeks, performed into discomfort — the most cited loading study in tendon rehabilitation, with a majority of patients improving substantially.
- Heavy slow resistance: 3-4 sets of 6-15 repetitions, 3 days weekly, comparable to eccentric loading in trials and often preferred for adherence — a valid alternative answer in exams.
- Isometrics first: sustained mid-range holds (about 5 × 45 seconds) are widely used to settle irritable tendons and produce analgesia, popularised by Rio and colleagues in patellar tendinopathy.
- Dosing rhythm: high tendon loads need roughly 24 hours between sessions, because collagen synthesis and degradation after heavy loading need a day to net remodel — a concrete answer to "how often should I do my exercises".
- Site-specific classics: patellar tendinopathy (jumper's knee) from jumping sports; gluteal tendinopathy with lateral hip pain in middle-aged women; lateral elbow tendinopathy (tennis elbow); De Quervain tenosynovitis in new mothers and texters — management is loading in all, with site-specific progressions.
- Red flags to surgery or caution: insertional Achilles symptoms (avoid dorsiflexion-biased drop-off-step eccentrics that compress the insertion), suspected full-thickness tears, and failed structured programmes of 3-6 months.
One tendon, twelve weeks — a worked case
A 34-year-old recreational runner presents with three months of mid-portion Achilles pain, worst first thing in the morning and after runs; the tendon is thickened, tender about 4 cm above the insertion, and a pain-monitoring model is agreed: pain up to 5 out of 10 during exercise is acceptable if settled by morning. Stage one holds a week of isometric wall-loaded calf holds, 5 × 45 seconds daily, which flattens her morning pain. Stage two is Alfredson: bilateral-to-unilateral eccentric drops off a step, 3 × 15 twice daily, into discomfort, with calf-raise capacity rebuilt in parallel through heavy slow resistance on leg press and seated calf machines. Stage three, from about week eight, reintroduces impact — hopping progression, then jog-walk intervals — because running is an energy-storage activity and energy storage is the last capacity a tendon recovers. At twelve weeks she runs 5 kilometres pain-free with a slightly thickened but painless tendon, the expected structural outcome: the rehabilitation goal is a tolerable, capable tendon, not a normal-looking scan.
How the topic appears in exams and Indian clinics
Theory papers ask candidates to explain the pathogenesis of tendinopathy and justify eccentric loading — the continuum model with the inflammation caveat is precisely what separates a first-class answer from a "tendinitis means inflammation, so rest and ultrasound" script that dated a decade ago. Short-note favourites are the Alfredson protocol (numbers expected: 3 × 15, twice daily, 12 weeks) and De Quervain tenosynovitis with its Finkelstein test. Indian practice brings two recurring distortions worth naming: prolonged rest and passive electrotherapy as the default, which leaves tendons deconditioned, and early cortisone injections for tennis elbow in busy OPDs, which trades long-term tendon integrity for short-lived relief. The examiner-pleasing line is that load is both the cause and, dosed correctly, the cure.
Frequently asked questions
What is the difference between tendinitis and tendinopathy?
Tendinitis implies active inflammation, which is rare and transient, whereas tendinopathy describes degenerative or reactive structural change driven by load, the accurate term for most persistent tendon pain.
What is the Alfredson protocol?
Three sets of fifteen eccentric heel drops off a step, twice daily for twelve weeks, originally for mid-portion Achilles tendinopathy, performed into discomfort.
Why do isometric exercises come before heavy loading in irritable tendons?
Sustained mid-range holds reduce pain and maintain muscle-tendon capacity without the symptom flare that heavy isotonic work can provoke in a highly irritable tendon.
How frequently should tendon loading exercises be performed?
Heavy tendon loading is usually spaced about 24 hours apart to respect collagen turnover, while isometric holds can be performed more often for pain relief.
Do corticosteroid injections help tendinopathy?
They can give short-term pain relief but are associated with higher recurrence and worse longer-term outcomes than exercise, and are used sparingly, rarely into major load-bearing tendons.