Prospective cohort study testing a 12-week heavy-load eccentric calf training protocol in recreational athletes with chronic Achilles tendinosis. All 15 patients had failed conventional nonsurgical treatment and were already selected for surgery. The study asks: can structured eccentric loading eliminate the need for operative intervention?
In 1998, chronic Achilles tendinosis that failed rest and NSAIDs had one recognized next step: surgery. Alfredson published this paper because his own patients — already on the surgical waiting list. Agreed to try an eccentric protocol first, and none of them ended up needing the operation.
When you see a middle-aged runner with ultrasound-confirmed Achilles tendinosis and failed conservative care, prescribe the Alfredson protocol before scheduling the OR. The prescription is specific: knee-straight and knee-bent heel drops, 3×15 reps each, twice daily every day, for 12 weeks, progressing load as pain allows.
Tell the patient to expect muscle soreness the first 1–2 weeks, and that mild tendon discomfort during exercise is acceptable. Disabling pain is the stop signal. This distinction is what makes the protocol work and what distinguishes it from generic "calf strengthening."
This paper is the direct reason eccentric loading became the standard first-line treatment for mid-portion Achilles tendinopathy worldwide. Subsequent RCTs and systematic reviews have consistently validated the approach, though long-term recurrence rates remain an open question.
Prospective cohort study testing a 12-week heavy-load eccentric calf training protocol in recreational athletes with chronic Achilles tendinosis. All 15 patients had failed conventional nonsurgical treatment and were already selected for surgery. The study asks: can structured eccentric loading eliminate the need for operative intervention?
In 1998, chronic Achilles tendinosis that failed rest and NSAIDs had one recognized next step: surgery. Alfredson published this paper because his own patients — already on the surgical waiting list. Agreed to try an eccentric protocol first, and none of them ended up needing the operation.
When you see a middle-aged runner with ultrasound-confirmed Achilles tendinosis and failed conservative care, prescribe the Alfredson protocol before scheduling the OR. The prescription is specific: knee-straight and knee-bent heel drops, 3×15 reps each, twice daily every day, for 12 weeks, progressing load as pain allows.
Tell the patient to expect muscle soreness the first 1–2 weeks, and that mild tendon discomfort during exercise is acceptable. Disabling pain is the stop signal. This distinction is what makes the protocol work and what distinguishes it from generic "calf strengthening."
This paper is the direct reason eccentric loading became the standard first-line treatment for mid-portion Achilles tendinopathy worldwide. Subsequent RCTs and systematic reviews have consistently validated the approach, though long-term recurrence rates remain an open question.