Effectiveness of reducing tendon compression in the rehabilitation of insertional Achilles tendinopathy: a randomised clinical trial.

Insertional Achilles tendinopathy, pain and stiffness where the tendon attaches to the heel bone, is notoriously hard to rehabilitate, partly because standard calf-stretching and loading exercises can compress the tendon against the bone and potentially aggravate it. This trial compared two versions of a structured, progressive loading programme: one designed to limit ankle dorsiflexion, avoid calf stretching, and use heel lifts to reduce tendon compression, versus a more conventional high-compression version. Both groups improved over time, but the low-compression approach produced significantly greater improvement in pain and function scores at both 12 and 24 weeks, with differences large enough to be considered clinically meaningful by the study's own threshold.

This is interesting because it suggests that how a loading programme is structured, not just whether loading happens, may matter for recovery. The main limitation is the small sample size, just 42 participants split across two groups, which limits how confidently these findings can be generalised.

If you've dealt with pain at the back of your heel where the Achilles tendon attaches to bone, you know how frustrating it can be to find an exercise programme that actually helps rather than making things worse. This study looked at two ways of doing a progressive strengthening programme for this condition, called insertional Achilles tendinopathy, in 42 physically active adults.

One version was designed to avoid stretching positions and movements that compress the tendon against the heel bone, using heel lifts and limiting ankle bending, while the other followed a more traditional approach that allowed more compression. Both groups saw improvement in pain and function over six months, but the group doing the compression-reducing version improved noticeably more, both at three months and at six months. The size of that difference was large enough to matter clinically, based on the researchers' own benchmark.

That said, this was a fairly small trial, so while the results are encouraging for this specific approach, they come from a limited number of people and would benefit from being confirmed in larger studies before drawing firm conclusions.

This is a summary of research, not medical advice. Talk to your own healthcare provider about anything affecting your care.

This investigator-blinded, stratified randomised trial compared low tendon compression rehabilitation (LTCR) against high tendon compression rehabilitation (HTCR) in 42 sport-active adults with chronic insertional Achilles tendinopathy, randomised 20 to LTCR and 22 to HTCR. Both arms followed an identical four-stage progressive loading framework (isometric, isotonic, energy-storage-and-release, sport-specific), with LTCR distinguished by dorsiflexion limitation, exclusion of calf stretching, and heel lift use.

The primary outcome, VISA-A score, favoured LTCR at both time points: a mean between-group difference of 12.9 points at 12 weeks (95% CI 6.2 to 19.6, p<0.001) and 10.4 points at 24 weeks (95% CI 3.7 to 17.1, p<0.001), both exceeding the stated minimal clinically important difference of 10. The intention-to-treat analysis and linear mixed model strengthen internal validity, and the consistency of the effect across two follow-up points adds some confidence. However, the small sample size (n=42) constrains precision and generalisability, and the abstract does not report on blinding of participants or therapists to intervention allocation, which is difficult to achieve with exercise-based protocols.

No adverse event data were mentioned. These findings support a rationale for compression-sensitive exercise prescription in this population but should be interpreted as one moderately powered trial rather than definitive evidence.