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Instrument-Assisted Soft Tissue Mobilization (IASTM) is a specialised hands-on physiotherapy technique that uses expertly-designed stainless steel or medical-grade tools to apply focused mechanical pressure and shear forces over muscles, fascia, tendons, and scar tissue to get many musculoskeletal benefits, such as
Stimulate fibroblast activity.
Increase local blood flow.
While muscle stretching and massage are familiar to many, IASTM remains a less discussed method — yet it plays an important role in modern sports rehab, injury management, and myofascial release.
At Mr Salus Sporting Lab in London, IASTM is integrated into personalised physiotherapy plans to optimise recovery and movement quality.
IASTM may work through mechanotransduction, where mechanical stress applied through instruments triggers cellular responses that support tissue remodelling and repair.
IASTM can also enhance circulation, reduce tissue viscosity, and stimulate mechanoreceptors that influence neuro-muscular function and proprioception.
These physiological effects can translate into:
Increased range of motion of the joints.
Reduced soft tissue “tightness” and knots.
Improved flexibility and movement patterning.
In a comparative study, IASTM applied over muscular regions showed meaningful improvement in range of motion and functional outcomes when compared to standard stretching protocols, suggesting it’s more than just a passive modality of rehabilitation.
There is evolving research evaluating the effectiveness of IASTM across various conditions:
A randomized clinical trial compared IASTM with traditional myofascial release in people with chronic mechanical neck pain and found measurable changes in pain and function following treatment.
A systematic review and effect-size analysis summarised that IASTM can improve range of motion, pain, and functional outcomes — although the evidence varies by population and condition.
Meta-analyses and literature reviews suggest that while IASTM shows promise for certain soft tissue and mobility outcomes, the quality of evidence is still building — highlighting the need for more high-quality clinical trials.
At Mr Salus Sporting Lab, we don’t use IASTM in isolation. Instead, it’s an integrated part of a tailored physiotherapy programme that also includes:
🟢 Hands-On Physiotherapy — such as sports massage and manual release technique.
🟢 High-Power Laser Therapy — to reduce inflammation and accelerate soft tissue recovery. (learn more on our High Power Laser Physiotherapy page)
🟢 Shockwave Therapy — to stimulate tissue regeneration and address deeper restrictions.
🟢 Movement Assessment & Functional Exercise — designed to support long-term improvements.
This multi-modal approach is outlined further in our blog post on how sports massage can improve shoulder mobility, where IASTM is highlighted as part of a comprehensive mobility-enhancing plan.
The Diacutaneous Fibrolysis is a special IASTM Technique, performed with stainless steel tools with a hook shape to apply a very strong and precise mechanical pressure over tendons, fascia, muscles, scar tissue, calcifications, and bone spurs.
Generally, there are two or three sizes of hooks to better fit different types of body parts.
The Diacutaneous Fibrolisys is the most aggressive and difficult IASTM technique to perform by a physiotherapist, which needs years of experience before developing a good sensitivity and manual skills in using these tools.
In our clinic in London, the Diacutaneous Fibrolysis has been performed in many long-term injuries, such as:
IASTM may be beneficial for individuals experiencing:
🔹 Soft tissue tightness after injury.
🔹 Reduced joint or muscle range of motion.
🔹 Myofascial restrictions impeding performance.
🔹 Post-surgical adhesions when used alongside conventional rehab.
🔹 Post-surgical tendon calcifications.
🔹 Bone spurs after bone fractures.
🔹 Chronic muscle tension that doesn’t respond to passive stretching and deep tissue massage.
By assisting the release of adhesions and facilitating better tissue quality, IASTM can support subsequent therapeutic exercise and functional retraining.
This technique can be suitable for:
However, like any intervention, it should be delivered by an appropriately trained physiotherapist as part of a broader clinical plan.
Mr Salus Sporting Lab has now opened a brand new sports injury clinic in Brixton, offering IASTM treatment to the local community.
Mr Salus Sporting Lab – Brixton is conveniently located just 4 minutes walking from Brixton Railway Station and 7 minutes walking from the Brixton underground station.
Our expert sports physiotherapist will provide the local community of Brixton with the best IASTM treatment, which is very effective for many muscle conditions and injuries.
Instrument-Assisted Soft Tissue Mobilization is a versatile physiotherapy tool that supports soft tissue health, movement quality, and rehabilitation outcomes.
While research continues to expand, existing studies show encouraging results for specific mobility and pain outcomes — and in our Sports Injury Clinic in London, it’s a valued part of a multi-modal rehabilitation strategy.
If you’d like a professional assessment and a tailored plan that may include IASTM alongside other cutting-edge treatments, book an appointment with our sports physiotherapy team in London today.