Manual TherapyManual TherapyNCT06992375
Shoulder Manipulation in Volleyball Players
A study testing Manual therapy and Exercise in people with Manual Therapy and Manipulation, run by Medical University of Gdansk at 1 site in Poland.
Trial summary
Currently, it is difficult to find studies in the literature assessing the influence of manual therapy on kinetic and kinematic factors for the upper limbs of volleyball players, which in the long run may translate into a reduction in injuries by improving strength and balance in athletes, when planning training or… Read more about this study
- Who is it for?
- Ages 18 to 30 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Manual Therapy, Manipulation, Muscle Strength
- What is being tested?
- Manual therapy and Exercise
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 12 participants
- Where
- 1 sitePoland
- Study dates
- 19 May 2025to 30 Sep 2025
- Phase
- Interventional
- 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 30 years
- Men only
- Healthy volunteers accepted
- Adult
Who may be able to join
- healthy individuals who are over 18 years old,
- a player from the AZS volleyball league,
- a player who regularly competes in the league,
- expressing informed consent to participate in the study and undertaking to comply with the track regulations and wear a helmet.
Who cannot join
- lack of volunteer consent,
- previous surgeries of the upper, lower limb and spine,
- other upper limb injuries in the last 6 months,
- pain limiting participation in the study,
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Poland1 site, 1 recruiting
- Recruiting
AZS Central Academic Sports Center in Gdańsk
Gdansk, 80-210
Rafał Studnicki, PhD, 583491509, rafal.studnicki@gumed.edu.pl
About this study
Official title: Assessment of the Impact of Shoulder Manipulation on Muscle Strength and Stiffness and Motor Functionality of Volleyball Players During Training
Currently, it is difficult to find studies in the literature assessing the influence of manual therapy on kinetic and kinematic factors for the upper limbs of volleyball players, which in the long run may translate into a reduction in injuries by improving strength and balance in athletes, when planning training or therapy.
- Conditions
- Manual Therapy, Manipulation, Muscle Strength, Muscles, Musculoskeletal System
- Being tested
- Manual therapy, Placebo, Exercise
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Manual therapyOther
This technique involves a low-amplitude, high-velocity push on the shoulder joints with an additional two-second tension
PlaceboOther
This technique involves a low-amplitude, high-velocity push on the shoulder joints with an additional two-second tension
ExerciseOther
The following exercise will be performed:push-ups
| Study group | Role | What they receive |
|---|---|---|
| Group A | Experimental | Will be used: manipulation, placebo and exercise Receives: Other: Manual therapy; Other: Placebo; Other: Exercise |
| Group B | Placebo comparator | Will be used: manipulation, placebo and exercise Receives: Other: Manual therapy; Other: Placebo; Other: Exercise |
| Group C | Active comparator | Will be used: manipulation, placebo and exercise Receives: Other: Manual therapy; Other: Placebo; Other: Exercise |
What is being measured
The primary outcome is the main question the study is designed to answer.
Assessment of MVC.
Muscle EMG is an assessment of electrical characteristics during the test, the electrical source of which is the muscle membrane potential, and measured in μV.
Measured: The study will be conducted 3 times: pre-intervention, immediately after the intervention and immediately after training session. Each isometric muscle test lasts 3 seconds.
Assessment of MVC.
Muscle EMG is an assessment of electrical characteristics during the test, which is measured by the repetition frequency of muscle motor unit discharges, which is measured in Hz, at the same time of the test.Time
Measured: The study will be conducted 3 times: pre-intervention, immediately after the intervention and immediately after training session.Each isometric muscle test lasts 3 seconds.
Muscle stiffness
Muscle stiffness - characteristic resistance to physical contraction, which deforms initially forming. Stiffness (N/m) was calculated as S = amax.mprobe/Δl.
Measured: The study will be conducted 3 times: pre-intervention, immediately after the intervention and immediately after training session. Each Myoton application lasts 1 sec for one point.
Secondary outcomes (4)
Assessment of proprioception.
Assessing proprioception is an assessment of the angular position of a joint and then an attempt to reproduce it, measured in degrees.
Measured: The test will be performed 3 times: pre-intervention, immediately after the intervention and immediately after training session. Each joint measurement will be performed at three settings: 30, 45 and 90 degrees.
Y balance test
Consists of the volunteer standing on one leg while simultaneously stretching the other lower limb in 3 different directions. These are: anterior, posteromedial and posterolateral.
Measured: The test will be conducted 3 times: pre-intervention, immediately after the intervention and immediately after training session.
Med Ball Throw
It involves the volunteer sitting on the floor with their legs apart and having to throw a 2 kg ball forward in front of them.
Measured: The test will be conducted 3 times: pre-intervention, immediately after the intervention and immediately after training session.
Close Kinetic Chain Upper Extremity Stability Test
The volunteer assumes a push-up position with their hands 36 inches apart, and their performance is assessed based on how many times in 15 seconds the person can lift one arm and move it across the position they are holding their hand in, and touch the other hand with it.
Measured: The test will be administered 3 times: pre-intervention, immediately after the intervention and immediately after training session.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted28 May 2025
- Study start19 May 2025 (estimated)
- Primary completion30 Sep 2025 (estimated)
- Study completion30 Sep 2025 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Manual TherapyStudies 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
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Triple blind
- Who is masked
- Participant, Investigator, Outcomes assessor
- Enrolment
- 12 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Medical University of Gdansk
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06992375
- Sponsor's protocol ID
- KB/95/2025
- Acronym
- Manual Therapy
- Status last verified
- Apr 2025
- First submitted
- 17 May 2025
- Last updated
- 28 May 2025
- Results posted
- No
- Data monitoring committee
- Yes
- 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 28 May 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Assessment of the Impact of Shoulder Manipulation on Muscle Strength and Stiffness and Motor Functionality of Volleyball Players During Training
- ClinicalTrials.gov ID
- NCT06992375
- Acronym / sponsor ID
- Manual Therapy / KB/95/2025
- Conditions
- Manual Therapy, Manipulation, Muscle Strength, Muscles, Musculoskeletal System
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 12 participants (estimated)
- Lead sponsor
- Medical University of GdanskUniversity, hospital or other
- Study start
- 19 May 2025 (estimated)
- Primary completion
- 30 Sep 2025 (estimated)
- Study completion
- 30 Sep 2025 (estimated)
- First posted
- 28 May 2025 (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.
Currently, it is difficult to find studies in the literature assessing the influence of manual therapy on kinetic and kinematic factors for the upper limbs of volleyball players, which in the long run may translate into a reduction in injuries by improving strength and balance in athletes, when planning training or therapy.
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Triple blind (participant, investigator, outcomes assessor)
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| Group A | Experimental | Other: Manual therapy, Other: Placebo, Other: ExerciseWill be used: manipulation, placebo and exercise |
| Group B | Placebo comparator | Other: Manual therapy, Other: Placebo, Other: ExerciseWill be used: manipulation, placebo and exercise |
| Group C | Active comparator | Other: Manual therapy, Other: Placebo, Other: ExerciseWill be used: manipulation, placebo and exercise |
Who may qualify
- Ages
- 18 to 30 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (4 listed)
- healthy individuals who are over 18 years old,
- a player from the AZS volleyball league,
- a player who regularly competes in the league,
- expressing informed consent to participate in the study and undertaking to comply with the track regulations and wear a helmet.
Key exclusion criteria (4 listed)
- lack of volunteer consent,
- previous surgeries of the upper, lower limb and spine,
- other upper limb injuries in the last 6 months,
- pain limiting participation in the study,
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Manual therapyThis technique involves a low-amplitude, high-velocity push on the shoulder joints with an additional two-second tension | Other | Group A, Group B, Group C |
| PlaceboThis technique involves a low-amplitude, high-velocity push on the shoulder joints with an additional two-second tension | Other | Group A, Group B, Group C |
| ExerciseThe following exercise will be performed:push-ups | Other | Group A, Group B, Group C |
Primary outcome
Assessment of MVC.
Time frame: The study will be conducted 3 times: pre-intervention, immediately after the intervention and immediately after training session. Each isometric muscle test lasts 3 seconds.
Muscle EMG is an assessment of electrical characteristics during the test, the electrical source of which is the muscle membrane potential, and measured in μV.
Assessment of MVC.
Time frame: The study will be conducted 3 times: pre-intervention, immediately after the intervention and immediately after training session.Each isometric muscle test lasts 3 seconds.
Muscle EMG is an assessment of electrical characteristics during the test, which is measured by the repetition frequency of muscle motor unit discharges, which is measured in Hz, at the same time of the test.Time
Muscle stiffness
Time frame: The study will be conducted 3 times: pre-intervention, immediately after the intervention and immediately after training session. Each Myoton application lasts 1 sec for one point.
Muscle stiffness - characteristic resistance to physical contraction, which deforms initially forming. Stiffness (N/m) was calculated as S = amax.mprobe/Δl.
4 secondary outcomes
Assessment of proprioception.
Time frame: The test will be performed 3 times: pre-intervention, immediately after the intervention and immediately after training session. Each joint measurement will be performed at three settings: 30, 45 and 90 degrees.
Y balance test
Time frame: The test will be conducted 3 times: pre-intervention, immediately after the intervention and immediately after training session.
Med Ball Throw
Time frame: The test will be conducted 3 times: pre-intervention, immediately after the intervention and immediately after training session.
Close Kinetic Chain Upper Extremity Stability Test
Time frame: The test will be administered 3 times: pre-intervention, immediately after the intervention and immediately after training session.
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 28 May 2025.
- 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.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Manual therapy and Exercise in people with Manual Therapy and Manipulation, run by Medical University of Gdansk at 1 site in Poland.
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 4 inclusion and 4 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: looking for participants now, as of the sponsor's last update on 28 May 2025. 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 Poland. 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. Some participants in this study may receive a placebo. 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?
Contact Rafał Studnicki, PhD (583491509, rafal.studnicki@gumed.edu.pl), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Assessment of MVC. (time frame: The study will be conducted 3 times: pre-intervention, immediately after the intervention and immediately after training session. Each isometric muscle test lasts 3 seconds.). The study lists 3 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 28 May 2025.