What should be different by six weeks?

By 6 weeks, the useful question is not whether the Achilles is “fixed”, but whether it is moving in the right direction. This stage is usually an early checkpoint rather than the end of rehab: Oxford University Hospitals advises a programme done daily for at least 12 weeks, and a 2020 review notes that full recovery can take a year or longer. A small but clear improvement in pain, function or load tolerance is therefore more meaningful than complete symptom resolution.

That improvement is often easiest to spot in ordinary tasks. Compared with week 1, morning stiffness may settle faster after activity, walking or stairs may feel less irritable, and calf raises or other loading exercises may be easier to tolerate. That fits the 2024 midportion Achilles guideline, which places tendon-loading exercise first line, and with a randomised trial showing that eccentric exercise improved pain and function after 6 weeks. There is no strong evidence for a universal “you must be better by week 6” rule, but some change in the trend is usually the sign that rehab is on track.

The same 6-week checkpoint also helps bring the escalation question forward. NHS Lanarkshire suggests physiotherapy referral if symptoms have not improved after about 6 to 12 weeks of advice or self-management. Earlier escalation matters if pain and weakness are worsening, the diagnosis is uncertain, or rupture is suspected; NICE CKS advises same-day orthopaedic referral for suspected rupture. Surgery, by contrast, is generally considered only after persistent symptoms despite at least 6 months of conservative treatment.

What physio is actually trying to change

Physiotherapy is not mainly trying to make the Achilles feel quiet for a day or two. The 2024 midportion Achilles guideline puts tendon-loading exercise first line, with loads as high as tolerated, because the bigger aim is to improve function as well as pain. The 2020 conservative-management review makes the same point in broader terms: Achilles tendinopathy affects how the tendon and calf complex handle force, so rehab is built around restoring load tolerance for ordinary tasks such as walking, stairs, hills and, later, running. Complete rest may calm symptoms briefly, but it does not usually rebuild that capacity.

At a 6-week stage, the most useful sign of progress is often something concrete that was difficult in week 1 becoming more manageable by week 6: morning steps easing sooner, a set of calf raises feeling less provocative, or an uphill walk no longer leaving the tendon sore for the rest of the day. Physio therefore tends to use graded loading rather than waiting for every repetition to be pain-free from day 1. In some cases, a monitored level of discomfort during exercise is accepted if it settles afterwards and the overall trend in pain and function is improving. Different loading formats can work: a 2015 trial found that eccentric training and heavy slow resistance both produced good clinical results.

What six weeks of rehab usually includes

Rather than revisiting whether week 6 counts as success or failure, the useful detail here is the shape of a structured block. In the 2020 conservative-management review, rehab starts with symptom management and load reduction: trimming the loads that keep flaring the tendon, often running volume, hills, speed work or jumping, while avoiding the trap of stopping all activity indefinitely. The point of that early phase is to settle irritability enough to create a tolerable starting point for loading.

From there, the programme usually shifts towards rebuilding calf strength and tendon capacity with progressive loading. The 2024 midportion Achilles guideline places tendon-loading exercise, with loads as high as tolerated, as first-line treatment. That does not mean there is one magic protocol. A 2015 trial found that eccentric training and heavy slow resistance both produced positive, equally good, lasting clinical results, so a well-run programme is usually adapted to the person, the sport and the tendon’s irritability rather than copied from one fixed sheet.

The broader framework is staged: the 2020 review describes symptom management and load reduction, recovery, rebuilding and graded return to sport. Insertional Achilles pain may need the plan altered rather than lifted from a standard mid-portion programme; NHS Lanarkshire notes that insertional and non-insertional presentations can require different treatments. That makes an early rehab block less about ticking off a standard list of drills and more about progressing the right load in the right way.

Why a slow start does not always mean failure

A tendon that still complains at 6 weeks has not necessarily stalled. Oxford University Hospitals’ patient information describes Achilles rehab as a programme done daily for at least 12 weeks, and the 2020 conservative-management review notes that full recovery can take a year or longer in some cases. That shifts the question slightly: by week 6, the useful check is usually whether the tendon is starting to tolerate more load and recover more predictably, not whether everything has settled.

The sharper distinction at this stage is between a wobble and a flat line. A brief flare after a harder walk, a new calf-loading session or a return to hills is not automatically failure if it settles and the overall week-to-week picture is moving forwards. More concerning is a pattern that is going nowhere by week 6: pain staying just as irritable, morning stiffness no shorter, walking tolerance not improving, or loading work remaining impossible to progress at all.

There is no single timetable for every Achilles. NHS Lanarkshire separates insertional from non-insertional tendinopathy because they may need different loading approaches, and insertional cases can be trickier. For that reason, a slow start may still be acceptable; a persistently unchanged or worsening pattern is the part that usually deserves review rather than quiet reassurance alone.

When to escalate sooner

To bring the escalation question forward, the practical thresholds split into urgent and routine review. NICE CKS advises same-day orthopaedic referral or admission if an Achilles rupture is suspected. That matters more than any 6-week milestone. A sudden "snap", immediate weakness or loss of push-off is a different pathway from tendinopathy and needs prompt assessment.

Outside that acute picture, earlier review is reasonable when the diagnosis is uncertain, symptoms are unusually severe, or a genuinely structured loading plan is going nowhere. The 2020 conservative-management review describes rehab as a staged, progressive process; if pain is worsening, loading cannot be progressed, or the tendon keeps flaring despite sensible adjustment, that pattern suggests the plan, the diagnosis, or both need checking. For people relying on self-management alone, NHS Lanarkshire says physiotherapy referral may be beneficial if symptoms have not improved within about 6 to 12 weeks.

Surgery is rarely a 6-week decision. NICE CKS says it may be considered only for persistent symptomatic Achilles tendinopathy after at least 6 months of conservative treatment. In other words, slow progress at 6 weeks may justify reassessment; several months of good-quality rehab with persistent disability is the point at which specialist escalation becomes more realistic.

What specialist assessment adds

After referral, the main gain is clarity. The 2024 midportion Achilles guideline still places diagnosis and examination before treatment decisions, and NHS Lanarkshire notes that Achilles tendinopathy is usually diagnosed clinically rather than by scan alone. History, palpation and a functional examination often do most of the work, with imaging used more when the picture is unclear or when later planning needs it.

That assessment then narrows the problem. NHS Lanarkshire distinguishes insertional from non-insertional Achilles pain because management may differ, and insertional cases can be more complex. A specialist review usually looks at where the pain sits, how irritable the tendon is, calf-raise strength, recent walking or running load, and what programme has actually been completed so far rather than whether exercises were simply “tried”. It also helps check whether the pain could be coming from another cause of posterior heel pain.

If the diagnosis is sound but the conservative care has been incomplete, the next step is often a better-structured rehab plan rather than an immediate procedure, because the 2024 guideline keeps tendon-loading exercise as first-line care. Injections or surgery sit further down the pathway and are considered case by case; NICE CKS places surgery after persistent symptoms despite conservative treatment, not as an early shortcut. In a Harley Street setting such as London Cartilage Clinic, the value of specialist assessment is that stepwise sorting of diagnosis, rehab quality and only then later-stage options.

1. [1] Achilles Pain, Stiffness, and Muscle Power Deficits: Midportion Achilles Tendinopathy Revision - 2024. (2024). https://doi.org/10.2519/jospt.2024.13079 https://doi.org/10.2519/jospt.2024.13079