BruxismCHAINSPORTNCT07556211
Neuromuscular Function and Performance in Athletes With or Without Bruxism
An observational study of Bruxism, run by Mainjot Amélie at 1 site in Belgium.
Trial summary
The aim of this study is to evaluate the associations between bruxism and neuromuscular function, as well as athletic performance, in a population of amateur athletes. Particular attention will be paid to musculoskeletal disorders associated with bruxism, particularly in the shoulder. Read more about this study
- Who is it for?
- Ages 18 to 35 yearsHealthy volunteers can take part
- Conditions the study is for
- Bruxism
- How many people
- 120 participants
- Where
- 1 siteBelgium
- Study dates
- 1 Aug 2026to 1 Jul 2028
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 35 years
- All sexes
- Healthy volunteers accepted
- Adult
Study population: Amateur athletes from the Province of Liège
Who may be able to join
- Practices swimming or handball 3 to 8 hours per week.
- Has the cognitive/mental capacity to take part in this study.
- Fluent in the language of the survey (French).
Who cannot join
- Current orthodontic treatment or treatment completed within the last 2 months.
- Shoulder and/or cervical spine injury or surgery within the past 6 months.
- Current cessation or limitation of sports activity due to shoulder and/or cervical symptoms at the time of participation.
- Any pathology or history of trauma to the dominant hand resulting in reduced grip strength.
- Any clinically manifest infectious episode at the time of participation.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
About this study
Official title: Is Bruxism Associated With Altered Systemic Neuromuscular Function and Increased Risk of Muscular Injury ?
The aim of this study is to evaluate the associations between bruxism and neuromuscular function, as well as athletic performance, in a population of amateur athletes. Particular attention will be paid to musculoskeletal disorders associated with bruxism, particularly in the shoulder. Participants' history of sports injuries will also be recorded. To control for the effect of potential confounding variables, levels of stress, anxiety, and mood, as well as sleep quality, will be systematically measured using validated questionnaires.
- Conditions
- Bruxism
- Medical subject headings
- Bruxism
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
| Study group | Role | What they receive |
|---|---|---|
| athlete | amateur athletes in the Province of Liège, aged between 18 and 35 |
What is being measured
The primary outcome is the main question the study is designed to answer.
Muscular Tone
Myotonometry will be performed with the MyotonPRO device, a digital palpation device, on the masseter, sternocleidomastoid, upper trapezius, erector spinae and quadriceps muscles at rest,
The device gives :
F - Natural Oscillation Frequency [Hz], characterizing Tone or Tension (higher values = higher tension)
Measured: Baseline
Dynamic Stiffness
Myotonometry will be performed with the MyotonPRO device, a digital palpation device, on the masseter, sternocleidomastoid, upper trapezius, erector spinae and quadriceps muscles at rest,
The device gives :
S - Dynamic Stiffness [N/m] (This biophysical parameter reflects the muscle's ability to resist contractions or external stresses to deformation, it can increased with exercice or pain)
Measured: Baseline
Muscular elasticity
Myotonometry will be performed with the MyotonPRO device, a digital palpation device, on the masseter, sternocleidomastoid, upper trapezius, erector spinae and quadriceps muscles at rest,
The device gives parameter of the neuromuscular function:
D - Logarithmic Decrement [relative unit], characterizing Elasticity (Higher values = lower elasticity)
Measured: Baseline
Muscular Mechanical Stress Relaxation Time
Myotonometry will be performed with the MyotonPRO device, a digital palpation device, on the masseter, sternocleidomastoid, upper trapezius, erector spinae and quadriceps muscles at rest,
The device gives :
R - Mechanical Stress Relaxation Time [ms] (low value correspond to fast tissue recovers its shape)
Measured: Baseline
Muscular Creep
Myotonometry will be performed with the MyotonPRO device, a digital palpation device, on the masseter, sternocleidomastoid, upper trapezius, erector spinae and quadriceps muscles at rest,
The device gives :
C - Ratio of Relaxation and Deformation time [relative unit], characterizing Creep (Higher Creep Value: Indicates higher fluidity, meaning the muscle is less rigid)
Measured: Baseline
Maximal grip strength test
Will be evaluated with the Eforto device, which is the first validated device to measure maximal grip strength test. One value in kPa. Higher values indicate higher muscle strength.
Measured: Baseline
Muscle fatigue
Will be evaluated with the Eforto device, which is the first validated device to measure muscle fatigability (fatigue resistance test, which was shown to reflect the level of both muscle energy and metabolism, neuromuscular function, and immune and stress responses). One value obtained, in seconds. Cut-off normative values in healthy 25-35 year-old male and female people are available, and lower values indicate increased muscle fatigability.
Measured: Baseline
Trapeze isometric force
Will be evaluated with dynamometer, higher values (unit is N) meaning higher muscular isometric force
Measured: Baseline
Muscular Tone
Myotonometry will be performed with the MyotonPRO device, a digital palpation device, on the masseter, sternocleidomastoid, upper trapezius, erector spinae and quadriceps muscles at rest,
The device gives :
F - Natural Oscillation Frequency [Hz], characterizing Tone or Tension (higher values = higher tension)
Measured: 15-30 minutes after training
Dynamic Stiffness
Myotonometry will be performed with the MyotonPRO device, a digital palpation device, on the masseter, sternocleidomastoid, upper trapezius, erector spinae and quadriceps muscles at rest,
The device gives :
S - Dynamic Stiffness [N/m] (This biophysical parameter reflects the muscle's ability to resist contractions or external stresses to deformation, it can increased with exercice or pain)
Measured: 15-30 minutes after training
Muscular elasticity
Myotonometry will be performed with the MyotonPRO device, a digital palpation device, on the masseter, sternocleidomastoid, upper trapezius, erector spinae and quadriceps muscles at rest,
The device gives parameter of the neuromuscular function:
D - Logarithmic Decrement [relative unit], characterizing Elasticity (Higher values = lower elasticity)
Measured: 15-30 minutes after training
Muscular Mechanical Stress Relaxation Time
Myotonometry will be performed with the MyotonPRO device, a digital palpation device, on the masseter, sternocleidomastoid, upper trapezius, erector spinae and quadriceps muscles at rest,
The device gives :
R - Mechanical Stress Relaxation Time [ms] (low value correspond to fast tissue recovers its shape)
Measured: 15-30 minutes after training
Muscular Creep
Myotonometry will be performed with the MyotonPRO device, a digital palpation device, on the masseter, sternocleidomastoid, upper trapezius, erector spinae and quadriceps muscles at rest,
The device gives :
C - Ratio of Relaxation and Deformation time [relative unit], characterizing Creep (Higher Creep Value: Indicates higher fluidity, meaning the muscle is less rigid)
Measured: 15-30 minutes after training
Secondary outcomes (4)
Shoulder - passive range of motion
Measurement of passive range of motion in internal and external rotation of the shoulder using a goniometer (in degrees), with the arm abducted 90° in the frontal plane. The higher values correspond to the higher passive range of motion
Measured: Baseline
Cervical spine mobility
Cervical spine mobility (flexion, extension, lateral flexion to the right and left, and rotation to the right and left). Assessment using a ordinal scale with values : Good, limited, very limited, from better to worse outcomes.
Measured: Baseline
Athletic performance
Athletic performance will be assessed and measured at the start of training and after the warm-up using a test specific to each sport.
For swimmers, a 50-meter crawl at maximum speed will be timed. For handball players, a T-test will be conducted and measured using photoelectric sensors. This test evaluates speed and accuracy on a course of cones arranged in a T-shape with specific distances between the cones (spaced 5 to 10 meters apart).
The lower values correspond to the better athletic performance.
Measured: Baseline
History of sports injuries
Obtained through questioning following International Olympic Committee guidelines. Descriptive outcome. Score severity according to the number and the severity of the injuries.
Measured: Baseline
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted29 Apr 2026
- Study start1 Aug 2026 (estimated)
- Primary completion1 Jul 2028 (estimated)
- Study completion1 Jul 2028 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for BruxismStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Cross-sectional
- Enrolment
- 120 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Mainjot Amélie
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor-investigator, Mainjot Amélie, University of Liege
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07556211
- Sponsor's protocol ID
- 2026/241
- Acronym
- CHAINSPORT
- Status last verified
- Apr 2026
- First submitted
- 9 Apr 2026
- Last updated
- 29 Apr 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 29 Apr 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Is Bruxism Associated With Altered Systemic Neuromuscular Function and Increased Risk of Muscular Injury ?
- ClinicalTrials.gov ID
- NCT07556211
- Acronym / sponsor ID
- CHAINSPORT / 2026/241
- Conditions
- Bruxism
- Study type
- Observational
- Recruitment status
- Enrolling by invitation
- Enrolment
- 120 participants (estimated)
- Lead sponsor
- Mainjot AmélieUniversity, hospital or other
- Study start
- 1 Aug 2026 (estimated)
- Primary completion
- 1 Jul 2028 (estimated)
- Study completion
- 1 Jul 2028 (estimated)
- First posted
- 29 Apr 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The aim of this study is to evaluate the associations between bruxism and neuromuscular function, as well as athletic performance, in a population of amateur athletes. Particular attention will be paid to musculoskeletal disorders associated with bruxism, particularly in the shoulder. Participants' history of sports injuries will also be recorded. To control for the effect of potential confounding variables, levels of stress, anxiety, and mood, as well as sleep quality, will be systematically measured using validated questionnaires.
Study design
- Observational model
- Cohort
- Time perspective
- Cross-sectional
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| athlete | – | –amateur athletes in the Province of Liège, aged between 18 and 35 |
Who may qualify
- Ages
- 18 to 35 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
- Study population
- Amateur athletes from the Province of Liège
Key inclusion criteria (3 listed)
- Practices swimming or handball 3 to 8 hours per week.
- Has the cognitive/mental capacity to take part in this study.
- Fluent in the language of the survey (French).
Key exclusion criteria (5 listed)
- Current orthodontic treatment or treatment completed within the last 2 months.
- Shoulder and/or cervical spine injury or surgery within the past 6 months.
- Current cessation or limitation of sports activity due to shoulder and/or cervical symptoms at the time of participation.
- Any pathology or history of trauma to the dominant hand resulting in reduced grip strength.
- Any clinically manifest infectious episode at the time of participation.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Muscular Tone
Time frame: Baseline
Myotonometry will be performed with the MyotonPRO device, a digital palpation device, on the masseter, sternocleidomastoid, upper trapezius, erector spinae and quadriceps muscles at rest, The device gives : F - Natural Oscillation Frequency [Hz], characterizing Tone or Tension (higher values = higher tension)
Dynamic Stiffness
Time frame: Baseline
Myotonometry will be performed with the MyotonPRO device, a digital palpation device, on the masseter, sternocleidomastoid, upper trapezius, erector spinae and quadriceps muscles at rest, The device gives : S - Dynamic Stiffness [N/m] (This biophysical parameter reflects the muscle's ability to resist contractions or external stresses to deformation, it can increased with exercice or pain)
Muscular elasticity
Time frame: Baseline
Myotonometry will be performed with the MyotonPRO device, a digital palpation device, on the masseter, sternocleidomastoid, upper trapezius, erector spinae and quadriceps muscles at rest, The device gives parameter of the neuromuscular function: D - Logarithmic Decrement [relative unit], characterizing Elasticity (Higher values = lower elasticity)
Muscular Mechanical Stress Relaxation Time
Time frame: Baseline
Myotonometry will be performed with the MyotonPRO device, a digital palpation device, on the masseter, sternocleidomastoid, upper trapezius, erector spinae and quadriceps muscles at rest, The device gives : R - Mechanical Stress Relaxation Time [ms] (low value correspond to fast tissue recovers its shape)
Muscular Creep
Time frame: Baseline
Myotonometry will be performed with the MyotonPRO device, a digital palpation device, on the masseter, sternocleidomastoid, upper trapezius, erector spinae and quadriceps muscles at rest, The device gives : C - Ratio of Relaxation and Deformation time [relative unit], characterizing Creep (Higher Creep Value: Indicates higher fluidity, meaning the muscle is less rigid)
Maximal grip strength test
Time frame: Baseline
Will be evaluated with the Eforto device, which is the first validated device to measure maximal grip strength test. One value in kPa. Higher values indicate higher muscle strength.
Muscle fatigue
Time frame: Baseline
Will be evaluated with the Eforto device, which is the first validated device to measure muscle fatigability (fatigue resistance test, which was shown to reflect the level of both muscle energy and metabolism, neuromuscular function, and immune and stress responses). One value obtained, in seconds. Cut-off normative values in healthy 25-35 year-old male and female people are available, and lower values indicate increased muscle fatigability.
Trapeze isometric force
Time frame: Baseline
Will be evaluated with dynamometer, higher values (unit is N) meaning higher muscular isometric force
Muscular Tone
Time frame: 15-30 minutes after training
Myotonometry will be performed with the MyotonPRO device, a digital palpation device, on the masseter, sternocleidomastoid, upper trapezius, erector spinae and quadriceps muscles at rest, The device gives : F - Natural Oscillation Frequency [Hz], characterizing Tone or Tension (higher values = higher tension)
Dynamic Stiffness
Time frame: 15-30 minutes after training
Myotonometry will be performed with the MyotonPRO device, a digital palpation device, on the masseter, sternocleidomastoid, upper trapezius, erector spinae and quadriceps muscles at rest, The device gives : S - Dynamic Stiffness [N/m] (This biophysical parameter reflects the muscle's ability to resist contractions or external stresses to deformation, it can increased with exercice or pain)
Muscular elasticity
Time frame: 15-30 minutes after training
Myotonometry will be performed with the MyotonPRO device, a digital palpation device, on the masseter, sternocleidomastoid, upper trapezius, erector spinae and quadriceps muscles at rest, The device gives parameter of the neuromuscular function: D - Logarithmic Decrement [relative unit], characterizing Elasticity (Higher values = lower elasticity)
Muscular Mechanical Stress Relaxation Time
Time frame: 15-30 minutes after training
Myotonometry will be performed with the MyotonPRO device, a digital palpation device, on the masseter, sternocleidomastoid, upper trapezius, erector spinae and quadriceps muscles at rest, The device gives : R - Mechanical Stress Relaxation Time [ms] (low value correspond to fast tissue recovers its shape)
Muscular Creep
Time frame: 15-30 minutes after training
Myotonometry will be performed with the MyotonPRO device, a digital palpation device, on the masseter, sternocleidomastoid, upper trapezius, erector spinae and quadriceps muscles at rest, The device gives : C - Ratio of Relaxation and Deformation time [relative unit], characterizing Creep (Higher Creep Value: Indicates higher fluidity, meaning the muscle is less rigid)
4 secondary outcomes
Shoulder - passive range of motion
Time frame: Baseline
Cervical spine mobility
Time frame: Baseline
Athletic performance
Time frame: Baseline
History of sports injuries
Time frame: Baseline
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 29 Apr 2026.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Bruxism, run by Mainjot Amélie at 1 site in Belgium.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: enrolling by invitation, as of the sponsor's last update on 29 Apr 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Belgium. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Muscular Tone (time frame: Baseline). The study lists 13 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 29 Apr 2026.