Injury PreventionNCT02311062
Compatibility of Different Injury Prevention Exercises in Athletes
A study testing Eccentric hamstring exercises and Unistable exercises in people with Injury Prevention, run by University of Greenwich.
Trial summary
This investigation is aimed to examine the effects of two different exercise-oriented protocols on the knee torque-angle relationship of the knee flexors. Thirty two young soccer players were be randomly assigned to three groups: hamstring-eccentric (ECC, n=11), unstable-squatting (UNS, n=11) or control (C, n=10). Read more about this study
- Who is it for?
- Ages 18 to 45 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Injury Prevention
- What is being tested?
- Eccentric hamstring exercises and Unistable exercises
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 32 participants
- Where
- No sites listed yet
- Study dates
- Mar 2012to Jun 2012
- Phase
- Interventional
- 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 45 years
- Men only
- Healthy volunteers accepted
- Adult
Who may be able to join
- males, recreationally trained football players
- Read and sign the informed consent
Who cannot join
- Participants that has undertaken a lower body resistance-training program in the preceding 6 months,
- Reported a previous lower limb injury
About this study
Official title: Effects of Two Different Injury Prevention Resistance Exercise Protocols on the Hamstring Torque-Angle Relationship: A Randomized Controlled Trial
This investigation is aimed to examine the effects of two different exercise-oriented protocols on the knee torque-angle relationship of the knee flexors.
Thirty two young soccer players were be randomly assigned to three groups: hamstring-eccentric (ECC, n=11), unstable-squatting (UNS, n=11) or control (C, n=10). The ECC and UNS groups performed eighteen sessions over 6 weeks of an injury prevention protocol, using only 3 hamstring-eccentric or unstable-squatting exercises. The angle-torque relationship was measured before and after the training intervention. Voluntary isometric torque was recorded at six test angles, with participants prone (35º-100º; 0º on full extension).
Read the detailed description
This study utilized a three parallel-groups randomized controlled design, where 3 between-participant conditions, ECC, UNS and C, were tested. Once considered eligible for the study, all participants were familiarized with the testing procedures. Participants attended the laboratory for a pre-training test session, where body mass, height and muscle functional parameters were recorded. Two days after their pre-test, participants including in ECC or UNS started a 6 weeks (18 sessions) training program while the control group did not perform any type of resistance training.
Nevertheless, during the 6 weeks intervention period all three groups continued with their normal recreationally physical activity consisting in 2 to 3 sessions per week of soccer training or friendly matches. Two days after the end of the intervention period muscle function was re-tested.
- Conditions
- Injury Prevention
- Being tested
- Eccentric hamstring exercises, Unistable exercises, Control
- Keywords
- training, soccer, eccentric, lengthening, unstable, squatting
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Eccentric hamstring exercisesOther
Three exercises: 3 sets of 8 repetitions with 1 minute of rest between sets and 2 minutes of rest between exercises
Unistable exercisesOther
Three exercises: 3 sets of 8 repetitions with 1 minute of rest between sets and 2 minutes of rest between exercises
ControlOther
Only soccer training
| Study group | Role | What they receive |
|---|---|---|
| Eccentric hamstring exercises | Experimental | Three workouts per week on non-consecutive days for 6 weeks. 1)Assisted Nordic Curl: Kneeling on the ground with ankles fixed by a partner, participant lowering the trunk to the ground by eccentrically contracting the hamstrings. 2) Eccentric single stiff-legged dead lift: From standing position with the arm crossing over the chest, participant lowering the body toward the ground by flexing the hip joint without bending the support leg knee and raising the other leg until form an straight line with the trunk4 3) Eccentric double stiff-legged dead lift: From standing position with the arm crossing over the chest, participant lowering the body toward the ground by flexing the hip joint without bending the knees until the body parallel with the floor. Receives: Other: Eccentric hamstring exercises |
| Unistable exercises | Experimental | Trained 3 times per week on non-consecutive days for 6 weeks for a total of 18 training sessions. UNS training consisted in the following three exercises: 1) One leg squat: Standing on the floor on one leg only and squat down until knee flexed to 900 and press back up with just that single leg. 2) One leg Squat on Bosu® balance Trainer: Standing on the Bosu® balance Trainer on one leg only and squat down until supported leg knee flexes to 900 and press back up with just that single leg. 3) Forward lunges on a Bosu® balance Trainer: position the forward leg on the Bosu® balance Trainer and squatting with the forward leg. Receives: Other: Unistable exercises |
| Control | Active comparator | Participants did not undergo any resistance training and continued with their regular soccer training. Receives: Other: Control |
What is being measured
The primary outcome is the main question the study is designed to answer.
knee torque-angle
Isokinetic measurements
Measured: 1 week
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted8 Dec 2014 (estimated)
- Study startMar 2012
- Primary completionMay 2012
- Study completionJun 2012
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Injury PreventionStudies 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
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 32 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Greenwich
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Fernando Naclerio, University of Greenwich
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02311062
- Sponsor's protocol ID
- UoG INJ001
- Status last verified
- Nov 2023
- First submitted
- 2 Dec 2014
- Last updated
- 5 Dec 2023
- Results posted
- No
- Data monitoring committee
- Yes
Study at a glance
From the registry record, last updated by the sponsor on 5 Dec 2023. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effects of Two Different Injury Prevention Resistance Exercise Protocols on the Hamstring Torque-Angle Relationship: A Randomized Controlled Trial
- ClinicalTrials.gov ID
- NCT02311062
- Acronym / sponsor ID
- UoG INJ001
- Conditions
- Injury Prevention
- Keywords
- training, soccer, eccentric, lengthening, unstable, squatting
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 32 participants (actual)
- Lead sponsor
- University of GreenwichUniversity, hospital or other
- Study start
- Mar 2012
- Primary completion
- May 2012 (actual)
- Study completion
- Jun 2012 (actual)
- First posted
- 8 Dec 2014 (estimated)
- 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.
This investigation is aimed to examine the effects of two different exercise-oriented protocols on the knee torque-angle relationship of the knee flexors.
Thirty two young soccer players were be randomly assigned to three groups: hamstring-eccentric (ECC, n=11), unstable-squatting (UNS, n=11) or control (C, n=10). The ECC and UNS groups performed eighteen sessions over 6 weeks of an injury prevention protocol, using only 3 hamstring-eccentric or unstable-squatting exercises. The angle-torque relationship was measured before and after the training intervention. Voluntary isometric torque was recorded at six test angles, with participants prone (35º-100º; 0º on full extension).
Detailed description
This study utilized a three parallel-groups randomized controlled design, where 3 between-participant conditions, ECC, UNS and C, were tested. Once considered eligible for the study, all participants were familiarized with the testing procedures. Participants attended the laboratory for a pre-training test session, where body mass, height and muscle functional parameters were recorded. Two days after their pre-test, participants including in ECC or UNS started a 6 weeks (18 sessions) training program while the control group did not perform any type of resistance training.
Nevertheless, during the 6 weeks intervention period all three groups continued with their normal recreationally physical activity consisting in 2 to 3 sessions per week of soccer training or friendly matches. Two days after the end of the intervention period muscle function was re-tested.
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| Eccentric hamstring exercises | Experimental | Other: Eccentric hamstring exercisesThree workouts per week on non-consecutive days for 6 weeks. 1)Assisted Nordic Curl: Kneeling on the ground with ankles fixed by a partner, participant lowering the trunk to the ground by eccentrically contracting the hamstrings. 2) Eccentric single stiff-legged dead lift: From standing position with the arm crossing over the chest, participant lowering the body toward the ground by flexing the hip joint without bending the support leg knee and raising the other leg until form an straight line with the trunk4 3) Eccentric double stiff-legged dead lift: From standing position with the arm crossing over the chest, participant lowering the body toward the ground by flexing the hip joint without bending the knees until the body parallel with the floor. |
| Unistable exercises | Experimental | Other: Unistable exercisesTrained 3 times per week on non-consecutive days for 6 weeks for a total of 18 training sessions. UNS training consisted in the following three exercises: 1) One leg squat: Standing on the floor on one leg only and squat down until knee flexed to 900 and press back up with just that single leg. 2) One leg Squat on Bosu® balance Trainer: Standing on the Bosu® balance Trainer on one leg only and squat down until supported leg knee flexes to 900 and press back up with just that single leg. 3) Forward lunges on a Bosu® balance Trainer: position the forward leg on the Bosu® balance Trainer and squatting with the forward leg. |
| Control | Active comparator | Other: ControlParticipants did not undergo any resistance training and continued with their regular soccer training. |
Who may qualify
- Ages
- 18 to 45 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (2 listed)
- males, recreationally trained football players
- Read and sign the informed consent
Key exclusion criteria (2 listed)
- Participants that has undertaken a lower body resistance-training program in the preceding 6 months,
- Reported a previous lower limb injury
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 |
|---|---|---|
| Eccentric hamstring exercisesThree exercises: 3 sets of 8 repetitions with 1 minute of rest between sets and 2 minutes of rest between exercises | Other | Eccentric hamstring exercises |
| Unistable exercisesThree exercises: 3 sets of 8 repetitions with 1 minute of rest between sets and 2 minutes of rest between exercises | Other | Unistable exercises |
| ControlOnly soccer training | Other | Control |
Primary outcome
knee torque-angle
Time frame: 1 week
Isokinetic measurements
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 5 Dec 2023.
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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.
Questions about this trial
What is this clinical trial studying?
A study testing Eccentric hamstring exercises and Unistable exercises in people with Injury Prevention, run by University of Greenwich.
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 2 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 5 Dec 2023. Status can change between updates, so confirm with the study contact before making plans.
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?
knee torque-angle (time frame: 1 week). 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 5 Dec 2023; AzTrials last refreshed its copy on 7 Nov 2026.