If you have been managing heel pain, Achilles pain, or shoulder pain for longer than three months and have not found adequate relief through physiotherapy and anti-inflammatories, you are in a large and often frustrated patient population. Chronic tendinopathies are notoriously resistant to standard treatment and are characterised by persistent pain and functional limitation that can interfere significantly with work, exercise, and quality of life. The frustration is compounded by the fact that corticosteroid injections, frequently offered as the next step after failed physiotherapy, often provide only temporary relief, and in some tendons, particularly the Achilles, carry a risk of weakening the tissue and increasing the risk of rupture. Shockwave therapy represents one of the best-evidenced alternatives to injections and surgical intervention for chronic tendinopathy, with multiple Cochrane-quality reviews confirming its efficacy. For adults on the Isle of Man in this clinical position, understanding what shockwave offers and what to expect from the process is the starting point for making an informed decision.
Plantar Fasciitis: When Rest and Orthotics Are Not Enough
Plantar fasciitis produces heel pain that is typically worst with the first steps of the morning or after periods of sitting, characterised by a sharp or burning pain on the medial heel that improves with continued walking but worsens again with prolonged standing. In the acute phase, ice, stretching, orthotics, and activity modification usually produce resolution within three to six months. In the chronic form, defined as symptoms persisting beyond six months, the tissue has typically entered a degenerative state characterised by disorganised collagen, absent inflammatory cells, and neovascularisation of the plantar fascia origin, making anti-inflammatory approaches ineffective because there is no active inflammation to suppress.
Shockwave therapy for chronic plantar heel pain has been studied in multiple randomised controlled trials, with the largest systematic review by Aqil and colleagues in the Journal of Bone and Joint Surgery in 2013 covering 11 trials and finding that shockwave significantly outperformed sham treatment. The number needed to treat to produce one clinically satisfactory outcome is approximately 3, meaning that three patients need to be treated for one to achieve clinically meaningful improvement. This is comparable to or better than the NNT for most pharmacological treatments used in musculoskeletal medicine. The best results are seen in patients whose symptoms have been present for more than six months and who have not responded to at least one previous conservative treatment approach.
Achilles Tendinopathy: Shockwave and the Exercise Dilemma
Achilles tendinopathy is divided into two anatomical forms: mid-portion tendinopathy affecting the tendon 2 to 7 centimetres above the heel, and insertional tendinopathy affecting the tendon at or very close to the calcaneal insertion. These two forms have different biomechanics, different responses to treatment, and different exercise prescriptions. Mid-portion tendinopathy responds to eccentric loading exercise, specifically the Alfredson heel drop protocol, and to shockwave therapy, with both producing comparable outcomes in well-designed trials. Insertional Achilles tendinopathy is more resistant to eccentric loading, which can worsen insertional symptoms through compression at the tendon-bone interface, and shockwave therapy shows a stronger relative advantage in the insertional form because it does not produce the compression forces that eccentric loading does.
For athletes and active adults on the Isle of Man whose Achilles tendinopathy is limiting training and performance, the combination of shockwave therapy with a modified loading programme that avoids provocative end-range positions in the insertional form, or progresses through the Alfredson protocol in the mid-portion form, typically produces better outcomes than either approach alone. The key point is that shockwave stimulates the biological repair process within the tendon, while the loading programme provides the mechanical guidance that ensures new collagen fibres are aligned appropriately for functional load bearing. Biology without mechanics produces disorganised repair; mechanics without biology produces insufficient substrate for repair. Both are needed.
Rotator Cuff and Shoulder Tendinopathy
The rotator cuff comprises four muscles whose tendons converge on the humeral head, providing shoulder stability and enabling the complex movement demands of the arm. Rotator cuff tendinopathy and partial-thickness tears are extremely common in adults over 40, with prevalence estimates rising to 50 percent or more in those over 70, though many of these are asymptomatic. When symptomatic, rotator cuff disease produces pain with overhead activities, lying on the affected shoulder at night, and activities involving combined elevation and rotation. The calcific variant, involving calcium hydroxyapatite deposition within the supraspinatus or other tendons, is particularly amenable to shockwave therapy because acoustic waves can mechanically disrupt and initiate resorption of the calcium deposits.
For non-calcific rotator cuff tendinopathy, the evidence for shockwave is less consistent than for plantar fasciitis or calcific shoulder disease, with some trials showing significant benefit and others showing marginal advantage over physiotherapy alone. The conclusion from the literature is that shockwave is a reasonable treatment option for persistent rotator cuff tendinopathy after supervised physiotherapy has failed, but that it should not be positioned as the first treatment ahead of an appropriate shoulder rehabilitation programme. For calcific rotator cuff tendinopathy specifically, the evidence is more compelling and shockwave should be considered early in the treatment pathway given the direct mechanistic rationale for disrupting calcium deposits.
Before and After Shockwave: Setting Up for Success
The outcome from shockwave therapy for tendinopathy is significantly influenced by the clinical context in which it is delivered. Patients who have received a clear diagnosis confirmed by imaging, who understand the degenerative rather than inflammatory nature of their condition, and who have an integrated rehabilitation plan that includes appropriate loading programme and activity modification alongside shockwave, consistently achieve better outcomes than those who receive shockwave as an isolated intervention without clinical context. A diagnostic ultrasound before initiating treatment allows the practitioner to confirm the diagnosis, assess tendon structural integrity, identify any associated pathology, and select treatment parameters appropriate for the specific tendon and pathology present.
After completing a course of shockwave, a graduated return to loading is essential for consolidating the repair achieved and preventing recurrence. The tissue has been stimulated to repair and remodel, but the new collagen requires progressive mechanical loading to mature into a functionally aligned structure. Returning immediately to the full training volume or work demands that initially produced the tendinopathy is a reliable route to recurrence. A graded return-to-load protocol, supervised by a physiotherapist familiar with tendinopathy rehabilitation, following the completion of shockwave treatment is as important as the treatment itself. At Zhen Wellness on the Isle of Man, shockwave for musculoskeletal conditions is provided in coordination with the client's physiotherapist or other treating clinician to ensure this integrated approach.
- Chronic plantar fasciitis NNT of approximately 3 with shockwave; best results after 6 months with failed conservative treatment
- Mid-portion Achilles responds to both eccentric loading and shockwave; insertional Achilles shows stronger relative benefit from shockwave
- Calcific rotator cuff: shockwave has direct mechanistic rationale for disrupting calcium deposits; strong evidence base
- Non-calcific rotator cuff: shockwave is reasonable after failed supervised physiotherapy, not as first treatment
- Diagnostic ultrasound before shockwave treatment confirms diagnosis and guides treatment parameters
- Graduated return-to-load after shockwave is as important as the treatment for preventing recurrence
- Combined shockwave and loading rehabilitation produces better outcomes than either alone for tendinopathies
Sources
- Aqil, A., et al. (2013). Extracorporeal shock wave therapy is effective in treating chronic plantar fasciitis. Journal of Bone and Joint Surgery, 95(13), 1070-1076.
- Rompe, J.D., et al. (2010). Eccentric loading, shock-wave treatment, or a wait-and-see policy for Achilles tendinopathy. American Journal of Sports Medicine, 38(3), 561-568.
- Bannuru, R.R., et al. (2014). Comparative effectiveness of shock wave therapy vs ultrasound therapy for shoulder calcific tendinopathy. JAMA Internal Medicine, 174(6), 961-968.
- Wang, C.J. (2012). Extracorporeal shockwave therapy in musculoskeletal disorders. Journal of Orthopaedic Surgery and Research, 7(1), 11.
- Schmitz, C., et al. (2015). Efficacy and safety of extracorporeal shock wave therapy. British Medical Bulletin, 116(1), 115-138.