The Relationship of the Joint Blockage and Muscle Spasm

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

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.

Study Overview

• Status: Completed
• Conditions: Muscle Cramps; Joint Dysfunction; NO DECOMPENSATED ILLNESS
• Intervention / Treatment: Procedure: Mobilization technique for sacroiliac joint

Detailed Description

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%.

• Study Type: Interventional
• Enrollment (Actual): 40
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Czechia
  • Prague, Czechia
    • Vokovice

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult
• Accepts Healthy Volunteers: Yes

Description

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

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Experimental investigated group; Group to which the mobilization technique will be applied to the sacroiliac joint according to "Cluster of Lasslet"	Procedure: Mobilization technique for sacroiliac joint; 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.
No Intervention: Control non-investigated group; A control group that undergoes an initial examination but subsequently receives no therapy. After 30 minutes of quiet rest, it is examined again.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Changing of piriformis muscle irritability	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.	one hour at all

Collaborators and Investigators

• Sponsor: Charles University, Czech Republic
• Investigators: Study Chair: Miroslav Petr, Doc., Charles University, Faculty of physical education and sport

Study record dates

Study Major Dates

• Study Start (Actual): November 10, 2025
• Primary Completion (Actual): November 10, 2025
• Study Completion (Actual): November 10, 2025

Study Registration Dates

• First Submitted: November 20, 2025
• First Submitted That Met QC Criteria: December 2, 2025
• First Posted (Estimated): December 4, 2025

Study Record Updates

• Last Update Posted (Estimated): December 4, 2025
• Last Update Submitted That Met QC Criteria: December 2, 2025
• Last Verified: December 1, 2025

More Information

Terms related to this study

• Keywords: muscle spasm; joint blockage; muscle irritability
• Additional Relevant MeSH Terms: Neurologic Manifestations; Musculoskeletal Diseases; Nervous System Diseases; Muscular Diseases; Neuromuscular Manifestations; Pathological Conditions, Signs and Symptoms; Signs and Symptoms; Joint Diseases; Spasm; Muscle Cramp
• Other Study ID Numbers: Svobodova, Piriformis

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO
• IPD Plan Description: not enough experience

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No