Anterior Cruciate Ligament InjuryDECALNCT07448064
Eccentric Phase Biomechanics of the Countermovement Jump After Anterior Cruciate Ligament Reconstruction
An observational study of Anterior Cruciate Ligament Injury and Anterior Cruciate Ligament Reconstruction Rehabilitation, run by Haute Ecole ARC Sante at 1 site in Switzerland.
Trial summary
Purpose: This study aims to better understand how force is produced during a vertical jump in individuals approximately six months after anterior cruciate ligament reconstruction compared with healthy individuals. Read more about this study
- Who is it for?
- Ages 18 to 40 yearsHealthy volunteers can take part
- Conditions the study is for
- Anterior Cruciate Ligament Injury, Anterior Cruciate Ligament Reconstruction Rehabilitation
- What is being tested?
- Countermovement Jump Force Platform Assessment and Isokinetic Test
- How many people
- 100 participants
- Where
- 1 siteSwitzerland
- Study dates
- 2 Mar 2022to 31 Mar 2025
- 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 40 years
- All sexes
- Healthy volunteers accepted
- Adult
Study population: The study population includes adults aged 18 to 40 years. The post-anterior cruciate ligament reconstruction cohort consists of individuals who underwent primary reconstruction using a hamstring tendon autograft and are evaluated between 5 and 7 months after surgery, following completion of standard rehabilitation and medical clearance for functional testing. The healthy control cohort includes recreationally active individuals with no history of anterior cruciate ligament injury, no prior lower limb surgery, and no lower extremity injury within the past 12 months. All participants must be able to perform maximal effort jumping and isokinetic strength testing.
Who may be able to join
- Post-Anterior Cruciate Ligament Reconstruction Cohort:
- Age between 18 and 40 years
- Primary anterior cruciate ligament reconstruction using a hamstring tendon autograft
- Assessment performed between 5 and 7 months post-surgery
- Completion of standard postoperative rehabilitation
- Medical clearance for functional testing
Show all 14Show fewer
- Ability to perform maximal effort jumping and strength testing
- Healthy Control Cohort:
- Age between 18 and 40 years
- Recreationally active (minimum two sessions of physical activity per week)
- No history of anterior cruciate ligament injury
- No lower limb surgery
- No lower extremity injury within the past 12 months
- No current knee pain or functional limitation
Who cannot join
- Previous anterior cruciate ligament reconstruction on either knee (except the index surgery for the ACL group)
- Concomitant ligament reconstruction (e.g., posterior cruciate ligament, medial collateral ligament, lateral collateral ligament)
- Symptomatic meniscal repair limiting full participation in testing
- Neurological disorders affecting lower limb function
- Inflammatory joint disease
- Pregnancy
- Inability to perform maximal effort testing
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Analysis of Biomechanical Alterations During the Eccentric Phase of the Countermovement Jump in Patients After Anterior Cruciate Ligament Reconstruction
Purpose: This study aims to better understand how force is produced during a vertical jump in individuals approximately six months after anterior cruciate ligament reconstruction compared with healthy individuals. After this type of knee surgery, many patients recover well clinically but may still present strength differences between the operated and non-operated leg. These differences are not always visible during routine clinical testing but may influence performance and potentially increase the risk of reinjury. By analyzing how force is generated during a standardized countermovement jump, this study seeks to identify whether biomechanical alterations persist at this stage of recovery and to improve decision-making related to rehabilitation and return to sport.
Study Design: This is an observational comparative study. Participants who have undergone anterior cruciate ligament reconstruction using a hamstring tendon graft will be assessed between five and seven months after surgery. Their results will be compared with those of healthy recreationally active individuals without a history of recent knee injury. No experimental treatment or modification of rehabilitation will be introduced as part of this study.
Read more
Procedures: Participants will complete a brief standardized warm-up followed by three maximal vertical countermovement jumps performed on a force platform. During the test, participants will keep their hands on their hips and will be instructed to jump as quickly and as high as possible. The force platform measures ground reaction forces from each leg separately, allowing detailed analysis of the lowering phase (when the body bends before jumping) and the push-off phase (when the body propels upward). The entire testing session lasts only a few minutes and reflects movements commonly used in rehabilitation and sports settings.
Measurements: The primary measurements include jump height and the mean force produced by each leg during both the eccentric (lowering) and concentric (push-off) phases of the jump. The study will also calculate limb symmetry indices to determine the degree of difference between the operated and non-operated legs. These measurements provide objective information about neuromuscular recovery and functional performance after surgery.
Risks: The procedures involve physical activity comparable to exercises already performed during standard rehabilitation. The risks are minimal and similar to those encountered during routine physical training. Participants may stop the test at any time if they experience discomfort.
Potential Benefits: Participants may not receive direct personal benefit from taking part in the study. However, the results may contribute to improving rehabilitation strategies, refining criteria used for return-to-sport decisions, and enhancing long-term functional outcomes after anterior cruciate ligament reconstruction. A better understanding of persistent biomechanical alterations may ultimately help reduce the risk of secondary injury and optimize recovery pathways.
- Conditions
- Anterior Cruciate Ligament Injury, Anterior Cruciate Ligament Reconstruction Rehabilitation
- Being tested
- Countermovement Jump Force Platform Assessment, Isokinetic Test
- Keywords
- Anterior Cruciate Ligament Reconstruction, Countermovement Jump, Knee Biomechanics, Return to Sport
- Medical subject headings
- Anterior Cruciate Ligament Injuries
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Countermovement Jump Force Platform AssessmentOther
Participants perform three maximal countermovement jumps on a calibrated force platform after a standardized warm-up. Hands are kept on the hips during testing. The platform records ground reaction forces from each limb separately during the eccentric (lowering) and concentric (push-off) phases of the jump. Jump height and limb symmetry indices are calculated. This procedure is used for biomechanical and functional assessment only and does not modify standard rehabilitation.
Isokinetic TestOther
isokinetic dynamometry is performed to assess concentric quadriceps and hamstring strength at standardized angular velocities. Peak torque values and limb symmetry indices are calculated for quadriceps and hamstring
| Study group | Role | What they receive |
|---|---|---|
| ACLR | Individuals aged 18-40 years who underwent primary anterior cruciate ligament reconstruction using a hamstring tendon graft and are assessed between 5 and 7 months after surgery. Participants must have completed standard rehabilitation and be cleared for functional testing at the time of evaluation. Receives: Other: Countermovement Jump Force Platform Assessment; Other: Isokinetic Test | |
| Healthy | Recreationally active individuals aged 18-40 years with no history of anterior cruciate ligament injury, no lower limb surgery, and no musculoskeletal injury affecting the lower extremities within the past 12 months. Participants must be physically active and free from current knee pain at the time of testing. Receives: Other: Countermovement Jump Force Platform Assessment; Other: Isokinetic Test |
What is being measured
The primary outcome is the main question the study is designed to answer.
Eccentric Mean Force
Measured: 3 and 6 months
Secondary outcomes (3)
Concentric Mean Force
Measured: 3 and 6 months
Jump Height
Measured: 3 and 6 months
Quadriceps and Hamstring Peak Torque
Measured: 3 and 6 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted4 Mar 2026
- Study start2 Mar 2022
- Primary completion31 Mar 2025
- Study completion31 Mar 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (3)Papers the sponsor has linked to this study.
- Other trials for Anterior Cruciate Ligament InjuryStudies 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
- Retrospective
- Enrolment
- 100 participants (actual)
Sponsor and investigators
- Lead sponsor
- Haute Ecole ARC Sante
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Forelli Florian, Haute Ecole ARC Sante
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07448064
- Sponsor's protocol ID
- DECAL ACL
- Acronym
- DECAL
- Status last verified
- Mar 2022
- First submitted
- 25 Feb 2026
- Last updated
- 4 Mar 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Ricupito R, Bravi M, Santacaterina F, Campardo G, Guarise R, Castellucci R, Alaoui IB, Forelli F. Biomechanical Alterations in the Unweight Phase of the Single-Leg Countermovement Jump After ACL Reconstruction. J Funct Morphol Kinesiol. 2025 Jul 30;10(3):296. doi: 10.3390/jfmk10030296.
PubMed 40843827Forelli F, Moiroux-Sahraoui A, Mazeas J, Ly W, Bialy M, Douryang M, Hewett TE, De Fontenay BP. Evaluation of eccentric and concentric force during vertical jump after anterior cruciate ligament reconstruction: a comparative study. BMC Sports Sci Med Rehabil. 2025 Aug 30;17(1):259. doi: 10.1186/s13102-025-01301-4.
PubMed 40886021Forelli F, Moiroux-Sahraoui A, Nekhouf B, Bouzekraoui Alaoui I, Vandebrouck A, Duffiet P, Ratte L, Bialy M, Bjerregaard A, Mazeas J, Douryang M, Rambaud A. Is Deceleration the Key Element in Vertical Jump Performance to Return to Sport After Anterior Cruciate Ligament Reconstruction With Hamstring Graft? A Preliminary Study. Int J Sports Phys Ther. 2025 Sep 2;20(9):1321-1329. doi: 10.26603/001c.142878. eCollection 2025.
PubMed 40904711
Study at a glance
From the registry record, last updated by the sponsor on 4 Mar 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Analysis of Biomechanical Alterations During the Eccentric Phase of the Countermovement Jump in Patients After Anterior Cruciate Ligament Reconstruction
- ClinicalTrials.gov ID
- NCT07448064
- Acronym / sponsor ID
- DECAL / DECAL ACL
- Conditions
- Anterior Cruciate Ligament Injury, Anterior Cruciate Ligament Reconstruction Rehabilitation
- Keywords
- Anterior Cruciate Ligament Reconstruction, Countermovement Jump, Knee Biomechanics, Return to Sport
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 100 participants (actual)
- Lead sponsor
- Haute Ecole ARC SanteUniversity, hospital or other
- Study start
- 2 Mar 2022 (actual)
- Primary completion
- 31 Mar 2025 (actual)
- Study completion
- 31 Mar 2025 (actual)
- First posted
- 4 Mar 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.
Purpose: This study aims to better understand how force is produced during a vertical jump in individuals approximately six months after anterior cruciate ligament reconstruction compared with healthy individuals. After this type of knee surgery, many patients recover well clinically but may still present strength differences between the operated and non-operated leg. These differences are not always visible during routine clinical testing but may influence performance and potentially increase the risk of reinjury. By analyzing how force is generated during a standardized countermovement jump, this study seeks to identify whether biomechanical alterations persist at this stage of recovery and to improve decision-making related to rehabilitation and return to sport.
Study Design: This is an observational comparative study. Participants who have undergone anterior cruciate ligament reconstruction using a hamstring tendon graft will be assessed between five and seven months after surgery. Their results will be compared with those of healthy recreationally active individuals without a history of recent knee injury. No experimental treatment or modification of rehabilitation will be introduced as part of this study.
Procedures: Participants will complete a brief standardized warm-up followed by three maximal vertical countermovement jumps performed on a force platform. During the test, participants will keep their hands on their hips and will be instructed to jump as quickly and as high as possible. The force platform measures ground reaction forces from each leg separately, allowing detailed analysis of the lowering phase (when the body bends before jumping) and the push-off phase (when the body propels upward). The entire testing session lasts only a few minutes and reflects movements commonly used in rehabilitation and sports settings.
Measurements: The primary measurements include jump height and the mean force produced by each leg during both the eccentric (lowering) and concentric (push-off) phases of the jump. The study will also calculate limb symmetry indices to determine the degree of difference between the operated and non-operated legs. These measurements provide objective information about neuromuscular recovery and functional performance after surgery.
Risks: The procedures involve physical activity comparable to exercises already performed during standard rehabilitation. The risks are minimal and similar to those encountered during routine physical training. Participants may stop the test at any time if they experience discomfort.
Potential Benefits: Participants may not receive direct personal benefit from taking part in the study. However, the results may contribute to improving rehabilitation strategies, refining criteria used for return-to-sport decisions, and enhancing long-term functional outcomes after anterior cruciate ligament reconstruction. A better understanding of persistent biomechanical alterations may ultimately help reduce the risk of secondary injury and optimize recovery pathways.
Study design
- Observational model
- Cohort
- Time perspective
- Retrospective
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| ACLR | – | Other: Countermovement Jump Force Platform Assessment, Other: Isokinetic TestIndividuals aged 18-40 years who underwent primary anterior cruciate ligament reconstruction using a hamstring tendon graft and are assessed between 5 and 7 months after surgery. Participants must have completed standard rehabilitation and be cleared for functional testing at the time of evaluation. |
| Healthy | – | Other: Countermovement Jump Force Platform Assessment, Other: Isokinetic TestRecreationally active individuals aged 18-40 years with no history of anterior cruciate ligament injury, no lower limb surgery, and no musculoskeletal injury affecting the lower extremities within the past 12 months. Participants must be physically active and free from current knee pain at the time of testing. |
Who may qualify
- Ages
- 18 to 40 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
- Study population
- The study population includes adults aged 18 to 40 years. The post-anterior cruciate ligament reconstruction cohort consists of individuals who underwent primary reconstruction using a hamstring tendon autograft and are evaluated between 5 and 7 months after surgery, following completion of standard rehabilitation and medical clearance for functional testing. The healthy control cohort includes recreationally active individuals with no history of anterior cruciate ligament injury, no prior lower limb surgery, and no lower extremity injury within the past 12 months. All participants must be able to perform maximal effort jumping and isokinetic strength testing.
Key inclusion criteria (14 listed)
- Post-Anterior Cruciate Ligament Reconstruction Cohort:
- Age between 18 and 40 years
- Primary anterior cruciate ligament reconstruction using a hamstring tendon autograft
- Assessment performed between 5 and 7 months post-surgery
- Completion of standard postoperative rehabilitation
Key exclusion criteria (7 listed)
- Previous anterior cruciate ligament reconstruction on either knee (except the index surgery for the ACL group)
- Concomitant ligament reconstruction (e.g., posterior cruciate ligament, medial collateral ligament, lateral collateral ligament)
- Symptomatic meniscal repair limiting full participation in testing
- Neurological disorders affecting lower limb function
- Inflammatory joint disease
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 |
|---|---|---|
| Countermovement Jump Force Platform AssessmentParticipants perform three maximal countermovement jumps on a calibrated force platform after a standardized warm-up. Hands are kept on the hips during testing. The platform records ground reaction forces from each limb separately during the eccentric (lowering) and concentric (push-off) phases of the jump. Jump height and limb symmetry indices are calculated. This procedure is used for biomechanical and functional assessment only and does not modify standard rehabilitation. | Other | ACLR, Healthy |
| Isokinetic Testisokinetic dynamometry is performed to assess concentric quadriceps and hamstring strength at standardized angular velocities. Peak torque values and limb symmetry indices are calculated for quadriceps and hamstring | Other | ACLR, Healthy |
Primary outcome
Eccentric Mean Force
Time frame: 3 and 6 months
3 secondary outcomes
Concentric Mean Force
Time frame: 3 and 6 months
Jump Height
Time frame: 3 and 6 months
Quadriceps and Hamstring Peak Torque
Time frame: 3 and 6 months
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 4 Mar 2026.
- Results publication: PubMed 40843827Ricupito R, Bravi M, Santacaterina F, Campardo G, Guarise R, Castellucci R, Alaoui IB, Forelli F. Biomechanical Alterations in the Unweight Phase of the Single-Leg Countermovement Jump After ACL Reconstruction. J Funct Morphol Kinesiol. 2025 Jul 30;10(3):296. doi: 10.3390/jfmk10030296.
- Results publication: PubMed 40886021Forelli F, Moiroux-Sahraoui A, Mazeas J, Ly W, Bialy M, Douryang M, Hewett TE, De Fontenay BP. Evaluation of eccentric and concentric force during vertical jump after anterior cruciate ligament reconstruction: a comparative study. BMC Sports Sci Med Rehabil. 2025 Aug 30;17(1):259. doi: 10.1186/s13102-025-01301-4.
- Results publication: PubMed 40904711Forelli F, Moiroux-Sahraoui A, Nekhouf B, Bouzekraoui Alaoui I, Vandebrouck A, Duffiet P, Ratte L, Bialy M, Bjerregaard A, Mazeas J, Douryang M, Rambaud A. Is Deceleration the Key Element in Vertical Jump Performance to Return to Sport After Anterior Cruciate Ligament Reconstruction With Hamstring Graft? A Preliminary Study. Int J Sports Phys Ther. 2025 Sep 2;20(9):1321-1329. doi: 10.26603/001c.142878. eCollection 2025.
- Individual participant dataSharing planned: No
Related trials for Anterior Cruciate Ligament Injury
Not yet recruiting
Stair Biomechanics and Vibration Study After ACLR
Anterior Cruciate Ligament Reconstruction (ACLR), Anterior Cruciate Ligament Injury
Not yet recruiting
Supporting Athletes' Return to Sports After ACL Reconstruction: A Study of a Psychological Readiness Program
Anterior Cruciate Ligament Reconstruction, Anterior Cruciate Ligament Injuries
Recruiting
Graded Exposure and Mindfulness Meditation for Patients Post-ACL Reconstruction
Anterior Cruciate Ligament Injuries
Not yet recruiting
Clinical and Biological Outcomes of BioBrace-Augmented ACL Reconstruction
Anterior Cruciate Ligament Injuries, Anterior Cruciate Ligament Rupture
Not yet recruiting
Effect of Transcutaneous Auricular Vagus Nerve Stimulation on Postoperative Recovery Quality in Patients Undergoing Anterior Cruciate Ligament Reconstruction
Anterior Cruciate Ligament Injuries, Recovery Quality
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 Anterior Cruciate Ligament Injury and Anterior Cruciate Ligament Reconstruction Rehabilitation, run by Haute Ecole ARC Sante at 1 site in Switzerland.
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 14 inclusion and 7 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 4 Mar 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 Switzerland. 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?
Eccentric Mean Force (time frame: 3 and 6 months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT07448064, which also lists 3 linked publications.
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 4 Mar 2026.