Patellar TendonNCT06829056
Presence of Pain Shows Greater Effect Than Tendon Structural Alignment During Landing Dynamics
An observational study of Patellar Tendon and Athletes, run by Escola Superior de Tecnologia da Saúde do Porto at 1 site in Portugal.
Trial summary
The goal of this observational study is to investigate the relationship between temporal, kinetic, and kinematic jump variables and patellar tendons' structure in athletes. The main research questions are: Does the structure of the patellar tendon relate to the temporal, kinetic, and kinematic variables of different… Read more about this study
- Who is it for?
- Ages 18 to 35 yearsHealthy volunteers can take part
- Conditions the study is for
- Patellar Tendon, Athletes
- How many people
- 39 participants
- Where
- 1 sitePortugal
- Study dates
- 1 Jun 2023to 31 Jul 2023
- Phase
- Observational
- Are there results?
- None posted in the registry
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: The target population for this study consisted of volleyball athletes aged 18 to 35, of both sexes.
Who may be able to join
- aged between 18-30 years;
- competing in the highest-level Portuguese volleyball league with a minimum of 10 years of volleyball practice.
Who cannot join
- presence of injuries or discomfort that impeded maximal jumping tests;
- history of surgery within the last 12 months;
- illness during data collection
Trial locations and contacts
1 site in 1 country.
Portugal1 site
Escola Superior de Saúde do Instituto Politécnico do Porto
Porto, Porto District, 4200-072
About this study
The goal of this observational study is to investigate the relationship between temporal, kinetic, and kinematic jump variables and patellar tendons' structure in athletes. The main research questions are:
Does the structure of the patellar tendon relate to the temporal, kinetic, and kinematic variables of different jumps?
To answer these questions, participants will undergo a UTC (Ultrasound Tissue Characterization) scan of the patellar tendon and perform two vertical jump: a countermovement jump and tuck jump test.
- Conditions
- Patellar Tendon, Athletes
- Keywords
- jump performance, patellar tendon, tendon structure, UTC
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 |
|---|---|---|
| Athletes | Included volunteer participants were aged between 18-30 years, competing in the highest-level Portuguese volleyball league with a minimum of 10 years of volleyball practice. Participants were excluded in presence of injuries or discomfort that impeded maxi- mal jumping tests, history of surgery within the last 12 months or illness during data collection. |
What is being measured
The primary outcome is the main question the study is designed to answer.
Tendon Structure
Ultrasound Tissue Characterization (UTC) captures tendon structure and quantifies the number of altered fibers. This technology classifies tendon structure into four echo types, reflecting tendon integrity and fibrillar organization. Data collection for the patellar tendon will be conducted with participants seated, hips and knees at 90° flexion, and feet supported on a stable surface. For the Achilles tendon, the participants will be lying down with ankle in neutral position. This positioning ensures the probe is aligned transversely to the tendons, enabling the acquisition of optimal ultrasound images without anisotropy. Ultrasound parameters will be standardized for all scans: a 40-second B-mode ultrasound using a 7-10 Hz linear transducer, with the probe attached to a tracking device that moves automatically along the tendon's perpendicular axis, capturing consecutive images at 0.2 mm intervals. A single scan of the tendons will be performed for each knee.
Measured: Baseline
Jump Variables
The data collection protocol includes the following tasks: countermovement jump and tuck jump test. Kinematic variables will be analyzed by recording the spatial positions of reflective markers placed on specific anatomical regions. Data will be captured using the Qualisys Motion Capture System (version 2021.2). Ground reaction forces will be measured using a force platform connected to a signal amplifier. The platform records the three components of ground reaction forces-anteroposterior, mediolateral, and vertical-via four sensors. The image capture hardware is connected to the Qualisys USB Analog Acquisition interface, synchronizing temporal, kinetic, and kinematic data with the Qualisys Track Manager (QTM) software.
Measured: baseline
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted17 Feb 2025
- Study start1 Jun 2023
- Primary completion31 Jul 2023
- Study completion31 Jul 2023
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Patellar TendonStudies 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
- Other
- Time perspective
- Cross-sectional
- Enrolment
- 39 participants (actual)
Sponsor and investigators
- Lead sponsor
- Escola Superior de Tecnologia da Saúde do Porto
- Sponsor type
- University, hospital or other
- Collaborators
- Universitat Internacional de Catalunya
- Responsible party
- Principal investigator, Daniela Ferreira Carneiro, Escola Superior de Tecnologia da Saúde do Porto
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06829056
- Sponsor's protocol ID
- FIS-2022-06
- Status last verified
- Feb 2025
- First submitted
- 10 Feb 2025
- Last updated
- 18 Feb 2025
- 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 18 Feb 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Presence of Pain Shows Greater Effect Than Tendon Structural Alignment During Landing Dynamics
- ClinicalTrials.gov ID
- NCT06829056
- Acronym / sponsor ID
- FIS-2022-06
- Conditions
- Patellar Tendon, Athletes
- Keywords
- jump performance, patellar tendon, tendon structure, UTC
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 39 participants (actual)
- Lead sponsor
- Escola Superior de Tecnologia da Saúde do PortoUniversity, hospital or other
- Collaborators
- Universitat Internacional de Catalunya
- Study start
- 1 Jun 2023 (actual)
- Primary completion
- 31 Jul 2023 (actual)
- Study completion
- 31 Jul 2023 (actual)
- First posted
- 17 Feb 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.
The goal of this observational study is to investigate the relationship between temporal, kinetic, and kinematic jump variables and patellar tendons' structure in athletes. The main research questions are:
Does the structure of the patellar tendon relate to the temporal, kinetic, and kinematic variables of different jumps?
To answer these questions, participants will undergo a UTC (Ultrasound Tissue Characterization) scan of the patellar tendon and perform two vertical jump: a countermovement jump and tuck jump test.
Study design
- Observational model
- Other
- Time perspective
- Cross-sectional
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Athletes | – | –Included volunteer participants were aged between 18-30 years, competing in the highest-level Portuguese volleyball league with a minimum of 10 years of volleyball practice. Participants were excluded in presence of injuries or discomfort that impeded maxi- mal jumping tests, history of surgery within the last 12 months or illness during data collection. |
Who may qualify
- Ages
- 18 to 35 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
- Study population
- The target population for this study consisted of volleyball athletes aged 18 to 35, of both sexes.
Key inclusion criteria (2 listed)
- aged between 18-30 years;
- competing in the highest-level Portuguese volleyball league with a minimum of 10 years of volleyball practice.
Key exclusion criteria (3 listed)
- presence of injuries or discomfort that impeded maximal jumping tests;
- history of surgery within the last 12 months;
- illness during data collection
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
Tendon Structure
Time frame: Baseline
Ultrasound Tissue Characterization (UTC) captures tendon structure and quantifies the number of altered fibers. This technology classifies tendon structure into four echo types, reflecting tendon integrity and fibrillar organization. Data collection for the patellar tendon will be conducted with participants seated, hips and knees at 90° flexion, and feet supported on a stable surface. For the Achilles tendon, the participants will be lying down with ankle in neutral position. This positioning ensures the probe is aligned transversely to the tendons, enabling the acquisition of optimal ultrasound images without anisotropy. Ultrasound parameters will be standardized for all scans: a 40-second B-mode ultrasound using a 7-10 Hz linear transducer, with the probe attached to a tracking device that moves automatically along the tendon's perpendicular axis, capturing consecutive images at 0.2 mm intervals. A single scan of the tendons will be performed for each knee.
Jump Variables
Time frame: baseline
The data collection protocol includes the following tasks: countermovement jump and tuck jump test. Kinematic variables will be analyzed by recording the spatial positions of reflective markers placed on specific anatomical regions. Data will be captured using the Qualisys Motion Capture System (version 2021.2). Ground reaction forces will be measured using a force platform connected to a signal amplifier. The platform records the three components of ground reaction forces-anteroposterior, mediolateral, and vertical-via four sensors. The image capture hardware is connected to the Qualisys USB Analog Acquisition interface, synchronizing temporal, kinetic, and kinematic data with the Qualisys Track Manager (QTM) software.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 18 Feb 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. This study is not recruiting at the moment.
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 Patellar Tendon and Athletes, run by Escola Superior de Tecnologia da Saúde do Porto at 1 site in Portugal.
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 2 inclusion and 3 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: finished, as of the sponsor's last update on 18 Feb 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 Portugal. 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?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
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?
Tendon Structure (time frame: Baseline). The study lists 2 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 18 Feb 2025.