The Relationship of the Joint Blockage and Muscle Spasm

An interventional study aimed at verifying the effect of sacroiliac joint blockage on changes in piriformis muscle tension. The study was conducted on 40 subjects, both male and female. Physical therapy methods were used to diagnose muscle tension as a diagnostic tool, along with a visual analogue scale. The intervention was performed using manual mobilisation techniques commonly used in clinical practice. The effectiveness was verified using the same physical therapy diagnostic tool as at the beginning. The entire research process is time-consuming, taking up to 1 hour per examinee.

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Key information

Conditions

NO DECOMPENSATED ILLNESS Joint Diseases Joint Dysfunction Muscle Cramp Muscle Cramps Muscular Diseases Musculoskeletal Diseases Nervous System Diseases Neurologic Manifestations Neuromuscular Manifestations Pathological Conditions, Signs and Symptoms Signs and Symptoms Spasm

Age range

18 year–60 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Vokovice

Prague, Czechia

About this study

Objectives: The main aim of this study is to summarise current knowledge about the relationship between functional joint blockage and chained muscle spasm. To verify the relationship between sacroiliac joint blockage and piriformis muscle using combined therapy as a diagnostic tool, where the main parameter monitored will be the intensity of piriformis muscle irritability before and after sacroiliac joint mobilisation.

Methods: Measurements will be taken on a group of 40 subjects. The research sample consists of people aged 18-60, randomly divided into an experimental and a control group. All subjects underwent an initial palpation examination of the piriformis muscle, during which the level of pain was determined on a numerical pain scale. All subjects then underwent measurement of the piriformis muscle's irritability threshold using the "Beauty-line device 4000 Topline" device. The experimental group then underwent therapeutic intervention in the form of sacroiliac joint mobilisation using the "Cluster of Lasslet" technique. This was followed by 30 minutes of relaxation. The control group received no therapeutic intervention and only 30 minutes of relaxation between the initial and final examinations. Both groups then underwent the same final examination as at the beginning.

The investigators expect a change in piriformis muscle hypertonicity after sacroiliac joint mobilisation, including a reduction in pain in this muscle, at a statistical significance level of 5%.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

palpation sensitivity of the piriformis muscle in the piriformis line,
limited joint play of the sacroiliac joint,
pain in the lower back, groin, perineum, buttocks, or hips, tenderness in the sacrum,
pain or weakness during resisted abduction at 90° flexion in the hip joint,
positive piriformis sign, positive Freiberg's test, positive Trendelenburg's test, or positive Pace's abduction test.
At least 50% of the accompanying signs of sacroiliac joint blockage must be present in each subject.

Exclusion criteria

acute (primarily infectious) diseases,
persons in acute condition after an accident,
persons recovering from an accident/illness

Treatment and study plan

Mobilization technique for sacroiliac joint

Procedure

The subject lies on their stomach, mobilization maneuvers are performed, a total of 4 maneuvers according to the recommended "Cluster of Lasslet" procedure for the sacroiliac joint.

Primary outcomes

Changing of piriformis muscle irritability

Time frame: one hour at all

After removing the sacroiliac joint blockage, the irritability threshold of the piriformis muscle increases and its painfulness decreases. The reduction in pain will be evident based on instrumental measurements using the Beauty-line device and palpation examination.

Sponsors and collaborators

Lead sponsor

Charles University, Czech Republic

Other

Registry information

Official study title

The Relationship Between the Blockage of the Sacroiliac Joint (SI) and the Spasm of the Piriformis Muscle.

Important dates

Study start: 2025
Primary completion: 2025
Study completion: 2025
First posted: Dec 4, 2025
Registry last updated: Dec 4, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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Completed