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THERAPIES & TRADITIONS · GUIDE

Muscles, Fascia and Connective Tissue Basics: What Massage Is Said to Change

Plain anatomy of muscle, tendon and fascia, and an honest check of what massage is said to change, from muscle knots to fascia release, with the research behind each claim.

Content last updated . This page has not been medically reviewed.

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Quick answer
Muscles, tendons and fascia are well-described tissues. What massage changes in them is much less certain. Many popular claims, such as "releasing" fascia, breaking up knots or loosening adhesions, are not backed by good human evidence in the sources we read. This page explains the basics and checks each claim. It teaches no technique.

Muscle

Nearly all movement in the body results from muscle contraction. [1] Each skeletal muscle fiber is a single cylindrical muscle cell. [2] Muscles are made of many fibers bundled together and wrapped in connective tissue, and the coverings give pathways for blood vessels and nerves. [2] Typically a muscle spans a joint and is attached to bone by tendons at both ends. [2]

Fascia

In one anatomy training source, fascia is the connective tissue outside the muscle's own sheath that surrounds and separates muscles. [2] Other authors point out that fascia is a widely used yet indistinctly defined term. [3] The Fascia Research Society set up a nomenclature committee to clarify it. [3] So when someone says "fascia", ask what they mean: one membrane, a sheet around a muscle, or a body-wide connective tissue system. Studies that use different meanings are not easy to compare.

What Massage Is Said to Change

6 findings · 2 mixed · 4 limited or unclearThe colour follows the evidence label on each card.

  1. Muscles become more compliant and joints move further

    Proposed

    A 2005 review said massage pressure is expected to increase muscle compliance and range of motion. [4]

  2. Fascia stiffness drops

    Preclinical or early; device, not hands; short-term

    In a study of 15 healthy men, 5 minutes of percussive device massage on the calf was followed by a change in deep fascia stiffness measured with shear-wave elastography before and after, in the same men. [5]

  3. The feeling of "tissue release" is fascia letting go

    Model only; not a clinical trial

    A mathematical model based on one volunteer found very large forces, outside the normal physiologic range, are needed to deform fascia lata and plantar fascia. [6] The authors said the sensation of release in those firm tissues cannot be due to such deformation. [6]

  4. Therapists can reliably find trigger points ("knots")

    Mixed

    A systematic review of 9 studies found none met all quality criteria and said physical examination cannot be recommended as a reliable test for trigger points. [7] A later critical review said palpation has good reliability in recent studies, with limits in the diagnostic criteria, and called for better research. [8]

  5. Massage speeds recovery after exercise

    Mixed; small effects

    A 2005 review: post-exercise massage reduced the severity of muscle soreness but had no effect on loss of muscle function. [4] A 2016 meta-analysis of 22 randomized trials found effects on performance recovery rather small and partly unclear. [9]

  6. Massage breaks up adhesions or scar tissue

    Marketing claim

    Proper evidence not found. We searched PubMed for massage and fascia stiffness measured by shear-wave elastography; the one relevant result was the percussive study above, which tested a device in healthy men, not scar tissue.

Notes on reading the table. Massage trials are hard to blind, which leaves them open to expectation effects. A review of back-pain trials named that bias as the most common. [10] A small before-and-after measurement says little about lasting change. For the longer discussion see the claim check on knots, adhesions and scar tissue, myofascial release and massage guns and percussive devices.

Related Pages

How touch and pressure work, anatomy and muscle terms for massage clients and what massage is.

Frequently asked questions

What is fascia?

In one anatomy source, it is connective tissue outside the muscle sheath that surrounds and separates muscles. [2] Researchers note the term is widely used but indistinctly defined. [3]

Can massage "release" fascia?

A mathematical model suggests very large forces are needed to deform the firm fascia in the thigh and sole of the foot, so the feeling of release is likely something else. [6] We found no good human trials showing fascia release.

Are muscle knots real?

Researchers have tested whether examiners can find trigger points reliably. A systematic review found physical examination was not shown to be a reliable way to diagnose them. [7] Some later authors report better reliability. [8]

Does massage break up scar tissue or adhesions?

Proper evidence not found in the sources we searched; see the claim check page.

Does massage help sore muscles?

A review reported less severe soreness after exercise but no effect on loss of function. [4] A meta-analysis found effects on performance recovery small and partly unclear. [9]

More details: evidence, limits and cautions

The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.

Safety Note
Muscle soreness or a tender spot is not a reason to push harder. Do not press deeply on a calf or leg that is swollen, tender and painful to the touch; those can be signs of a blood clot, and the NHLBI says to call your healthcare provider right away if you suspect one. [11] Rare serious harms such as a blood clot, nerve injury or bone fracture have been reported after massage, some involving vigorous deep tissue work. [12] See massage and blood clots. Anyone with persistent pain, numbness or weakness should see a clinician.
References
  1. NCI SEER Training Modules, Introduction to the Muscular System. Read 2026-10-22.
  2. NCI SEER Training Modules, Structure of Skeletal Muscle. Read 2026-10-22.
  3. Adstrum S et al., Defining the fascial system, J Bodyw Mov Ther 2017 (PubMed abstract). Read 2026-10-22.
  4. Weerapong P et al., The mechanisms of massage and effects on performance, muscle recovery and injury prevention, Sports Med 2005 (PubMed abstract). Read 2026-10-22.
  5. Liu Z et al., Acute effects of local high-frequency percussive massage on deep fascial and muscular stiffness and joint range of motion, J Sport Rehabil 2024 (PubMed abstract). Read 2026-10-22.
  6. Chaudhry H et al., Three-dimensional mathematical model for deformation of human fasciae in manual therapy, J Am Osteopath Assoc 2008 (PubMed abstract). Read 2026-10-22.
  7. Lucas N et al., Reliability of physical examination for diagnosis of myofascial trigger points: a systematic review, Clin J Pain 2009 (PubMed abstract). Read 2026-10-22.
  8. Barbero M et al., Myofascial pain syndrome and trigger points: evaluation and treatment in patients with musculoskeletal pain, Curr Opin Support Palliat Care 2019 (PubMed abstract). Read 2026-10-22.
  9. Poppendieck W et al., Massage and performance recovery: a meta-analytical review, Sports Med 2016 (PubMed abstract). Read 2026-10-22.
  10. Furlan AD et al., Massage for low-back pain, Cochrane Database Syst Rev 2015 (PubMed abstract). Read 2026-10-22.
  11. NHLBI (US National Institutes of Health), Venous thromboembolism: symptoms (updated 19 September 2022). Read 2026-10-22.
  12. NCCIH, Massage Therapy: What You Need To Know (page last updated May 2019). Read 2026-10-22.
Education, not medical advice. This page is for general information. It does not diagnose or treat any condition and is not a substitute for care from a qualified health professional. Natural does not automatically mean safe. Ask a clinician or pharmacist before changing your care, especially if you take medication, are pregnant or breastfeeding, or have a health condition.