Hamstring InjuryNCT04668105
Dose Response of Nordic Hamstring Exercise on Performance in Athletes
A study testing High volume nordic hamstring exercise and Low volume nordic hamstring exercise in people with Hamstring Injury, run by Riphah International University at 1 site in Pakistan.
Trial summary
The aim of this research is to compare the effects of dose response of Nordic hamstring exercise on muscle strength, agility and speed in athletes a randomized controlled trial done at JKD cricket academy and sports centre, Peshawar. The sample size was 34. Read more about this study
- Who is it for?
- Ages 18 to 30 years
- Conditions the study is for
- Hamstring Injury
- What is being tested?
- High volume nordic hamstring exercise and Low volume nordic hamstring exercise
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 34 participants
- Where
- 1 sitePakistan
- Study dates
- 10 Aug 2020to 30 Jan 2021
- 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 30 years
- All sexes
- No healthy volunteers
- Adult
Who may be able to join
- Athletes participating in games for at least 06 months
- BMI 18.5-24.5
Who cannot join
- Have injuries (prior 6 months) or instability in knee
- Have recently had knee or hip surgery
- Are recovering from injury or surgery involving spine, or neck
- Have ruptured or torn ligaments in knee or ankle, such as Achilles tendon.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Effects of Dose Response of Nordic Hamstring Exercise on Muscle Strength, Agility and Speed in Athletes
The aim of this research is to compare the effects of dose response of Nordic hamstring exercise on muscle strength, agility and speed in athletes a randomized controlled trial done at JKD cricket academy and sports centre, Peshawar. The sample size was 34. The subjects were divided in two groups, 17 subjects in Group 1 which will do high volume Nordic hamstring exercise and 17 in Group 2 which will do low volume Nordic hamstring exercise. Study duration was of 6 months. Sampling technique applied was non probability purposive sampling technique. Only 18-30 years athletes with BMI between 18.5-24.5 kg/m2 were included. Tools used in the study are Single leg hamstring bridge (SLHB), Agility t-test, 30-m speed test and muscles size .Data will be analyzed through SPSS 21.
Read the detailed description
One of the most common injury in sports is the Hamstring injury, as hamstring is very susceptible to tears and strains. Hamstring muscle strain-type injuries are common in sports that involve high degree of speed, power and agility such as sprinters, soccer, basketball, tennis and football. Occurring in both recreational and professional sports, these injuries can result in substantial time lost from sport and commonly recur.
When sprinting, the hamstring muscles of the swing leg function concentrically as hip extensors to quickly swing the thigh back, whereas the same muscle group acts eccentrically as knee flexors to decelerate the forward swing leg. This last action is a probable contributing injury mechanism because of the increased peak hamstring musculotendinous stretch, activation, and active lengthening contraction of the hamstring muscles. The Nordic Hamstring Exercise (NHE) was previously termed the 'Russian hamstring exercise'. This is a partner exercise which can be performed easily on the pitch without special equipment. The NHE involves the player attempting to resist a forward-falling motion from a kneeling position, eccentrically contracting hamstring muscles and thought to replicate hamstring function during terminal swing phase. NHE is a preventive strategy which may reduce the incidence of hamstring injury, medical costs, and personal suffering of the injured player keeping in view the training exposure, training intensity, and compliance to preventive measures. Programs that include the NHE reduce hamstring injuries by up to 51%. The NHE essentially halves the rate of hamstring injuries across multiple sports in different athletes. Even in the face of promising NHE preventive effect shown by previous studies,adoption and implementation of the NHE programs is still low. Evidence show improvement in performance, agility and speed in athletes by NHE training but lowest dose of NHE required to enhance athletes' performance , agility and speed is yet to be found. This study attempts to investigate the lowest dose response of NHE by comparing the effects of high volumes of NHE with low volumes of NHE.
Literature review: Mjølsnes et al first demonstrated that a NHE program performed on the training environment of professional soccer players is more effective in developing maximal eccentric hamstring strength than a comparable program based on hamstring curl machine at the fitness center.
Three large prospective trials (two randomized and one non-randomized) reduced injuries by approximately 70% by implementing the NHE in a team's training regime. The results from the meta-analysis suggested that teams using the NHE (in isolation or as part of a larger injury prevention program) reduced hamstring injury rates up to 51%.
Brooks et al studied the effects of the NHE on the incidence and severity of hamstring strains among 546 professional rugby union players. The NH exercise group had a significantly lower hamstring injury rate and severity than the strengthening and the stretching/ strengthening group.
In a 2020, meta-analyses, positive outcomes were reported on jump performance, repeated sprint ability and agility of athletes after NHE protocol.
A study conducted for 6 weeks concluded that NHE resulted in significant improvements in eccentric strength of hamstrings and performance in 10 m sprinters and also in change of direction speed immediately after the training protocol. These improvements remained even after 3 weeks of detraining.
In a study NHE has shown improvements in strength and dynamic control after 10 weeks of training, a reduction in the maximum peak torque (when approaching full knee extension), and a lower incidence rate of hamstring injuries in athletes.
- Conditions
- Hamstring Injury
- Being tested
- High volume nordic hamstring exercise, Low volume nordic hamstring exercise
- Keywords
- Agility t test, Eccentric strength, Hamstring injuries, Nordic Hamstring exercises, Single leg Hamstring bridges
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
High volume nordic hamstring exerciseOther
To perform Nordic Hamstring Curls, the person will kneel on a pad (for knee comfort) and lower under control, his ankles must be stabilized and kept in a place with the help of a partner, but can also use a moveable object or a loaded barbell can also be used to achieve the stability. The person must then extend his hamstrings in order to lean forward, he should lean forward from the knee and not from the hip. The movement must be kept controlled and slow. The person should go as forward/low as possible but without the help of hands or arms. The only time one can put his hands in front of him is when he can't rely on his legs and then push himself back to starting position and then repeat the procedure again.Group 1 will do the Nordic hamstring exercise with protocol 3 repetitions × 3sets× 3 times for 4 weeks.
Low volume nordic hamstring exerciseOther
To perform Nordic Hamstring Curls, the person will kneel on a pad (for knee comfort) and lower under control, his ankles must be stabilized and kept in a place with the help of a partner, but can also use a moveable object or a loaded barbell can also be used to achieve the stability. The person must then extend his hamstrings in order to lean forward, he should lean forward from the knee and not from the hip. The movement must be kept controlled and slow. The person should go as forward/low as possible but without the help of hands or arms. The only time one can put his hands in front of him is when he can't rely on his legs and then push himself back to starting position and then repeat the procedure again. Group 2 will do the Nordic hamstring exercise with protocol 3 repetitions × 3 sets × 1 times for 4 weeks.
| Study group | Role | What they receive |
|---|---|---|
| High volume nordic hamstring exercise | Experimental | High volume Nordic hamstring exercise Receives: Other: High volume nordic hamstring exercise |
| Low volume Nordic Hamstring exercise | Experimental | Low volume Nordic Hamstring exercise Receives: Other: Low volume nordic hamstring exercise |
What is being measured
The primary outcome is the main question the study is designed to answer.
Single leg hamstring bridge test
Single leg hamstring bridge (SLHB) is a clinical test for hamstring function used at elite level for the screening programs. To perform this test, person lies on his back with bent knees, hip distance apart, and feet flat on mat stacked under the knees. Extend one leg long towards the ceiling. Squeeze glutes and lift hips off the mat into a bridge. Lower and lift the hips for desired number of repetitions and repeat on other side
Measured: 4th week
Secondary outcomes (3)
Agility t- test
Agility T test is a running test of agility; it involves forward, lateral, and backward movements suitable for a wide range of sports. The subject starts at Cone A. On the command of the timer, the subject sprints to Cone B, and touches the base of the cone with their right hand. They then turn left and shuffle sideways to Cone C, and also touch its base, this time with their left hand. Then shuffling sideways to the right to Cone D and touching the base with their right hand. They then shuffle back to Cone B touching with the left hand, and run backwards to Cone A. The stop watch is stopped as they reach Cone A. We will perform this test for 3 times and will take the best time of the 3 trials.
Measured: 4th week
30-m speed test
30-m Speed test or Sprint test is performed. The time is recorded while the person performs one 30 meters maximum sprint. This test is used to measure the speed and acceleration.
Measured: 4th week
Muscle size
Thigh circumference through anthropometric measuring tape to measure the size of hamstring. The tape will be placed at 5, 10 and 15 cm proximal to superior pole of patella.
Measured: 4th week
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted16 Dec 2020
- Study start10 Aug 2020
- Primary completion30 Dec 2020
- Study completion30 Jan 2021
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (10)Papers the sponsor has linked to this study.
- Other trials for Hamstring InjuryStudies of the same condition, open and under way.
- More trials run by Riphah International UniversityThe sponsor's other registered studies.
- 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
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Outcomes assessor
- Enrolment
- 34 participants (actual)
Sponsor and investigators
- Lead sponsor
- Riphah International University
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Aisha Razzaq, MSPT-OMPT, Principal investigator, Riphah International University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04668105
- Sponsor's protocol ID
- REC/00789 SaeedUllah
- Status last verified
- Aug 2021
- First submitted
- 9 Dec 2020
- Last updated
- 27 Aug 2021
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
van Dyk N, Behan FP, Whiteley R. Including the Nordic hamstring exercise in injury prevention programmes halves the rate of hamstring injuries: a systematic review and meta-analysis of 8459 athletes. Br J Sports Med. 2019 Nov;53(21):1362-1370. doi: 10.1136/bjsports-2018-100045. Epub 2019 Feb 26.
PubMed 30808663Goode AP, Reiman MP, Harris L, DeLisa L, Kauffman A, Beltramo D, Poole C, Ledbetter L, Taylor AB. Eccentric training for prevention of hamstring injuries may depend on intervention compliance: a systematic review and meta-analysis. Br J Sports Med. 2015 Mar;49(6):349-56. doi: 10.1136/bjsports-2014-093466. Epub 2014 Sep 16.
PubMed 25227125Al Attar WSA, Soomro N, Sinclair PJ, Pappas E, Sanders RH. Effect of Injury Prevention Programs that Include the Nordic Hamstring Exercise on Hamstring Injury Rates in Soccer Players: A Systematic Review and Meta-Analysis. Sports Med. 2017 May;47(5):907-916. doi: 10.1007/s40279-016-0638-2.
PubMed 27752982Jonhagen S, Nemeth G, Eriksson E. Hamstring injuries in sprinters. The role of concentric and eccentric hamstring muscle strength and flexibility. Am J Sports Med. 1994 Mar-Apr;22(2):262-6. doi: 10.1177/036354659402200218.
PubMed 8198197Mendiguchia J, Arcos AL, Garrues MA, Myer GD, Yanci J, Idoate F. The use of MRI to evaluate posterior thigh muscle activity and damage during nordic hamstring exercise. J Strength Cond Res. 2013 Dec;27(12):3426-35. doi: 10.1519/JSC.0b013e31828fd3e7.
PubMed 23524362van der Horst N, Smits DW, Petersen J, Goedhart EA, Backx FJ. The preventive effect of the nordic hamstring exercise on hamstring injuries in amateur soccer players: a randomized controlled trial. Am J Sports Med. 2015 Jun;43(6):1316-23. doi: 10.1177/0363546515574057. Epub 2015 Mar 20.
PubMed 25794868Krist MR, van Beijsterveldt AM, Backx FJ, de Wit GA. Preventive exercises reduced injury-related costs among adult male amateur soccer players: a cluster-randomised trial. J Physiother. 2013 Mar;59(1):15-23. doi: 10.1016/S1836-9553(13)70142-5.
PubMed 23419911Junge A, Lamprecht M, Stamm H, Hasler H, Bizzini M, Tschopp M, Reuter H, Wyss H, Chilvers C, Dvorak J. Countrywide campaign to prevent soccer injuries in Swiss amateur players. Am J Sports Med. 2011 Jan;39(1):57-63. doi: 10.1177/0363546510377424. Epub 2010 Oct 17.
PubMed 20956263Petersen J, Thorborg K, Nielsen MB, Budtz-Jorgensen E, Holmich P. Preventive effect of eccentric training on acute hamstring injuries in men's soccer: a cluster-randomized controlled trial. Am J Sports Med. 2011 Nov;39(11):2296-303. doi: 10.1177/0363546511419277. Epub 2011 Aug 8.
PubMed 21825112Ribeiro-Alvares JB, Marques VB, Vaz MA, Baroni BM. Four Weeks of Nordic Hamstring Exercise Reduce Muscle Injury Risk Factors in Young Adults. J Strength Cond Res. 2018 May;32(5):1254-1262. doi: 10.1519/JSC.0000000000001975.
PubMed 28459795
Study at a glance
From the registry record, last updated by the sponsor on 27 Aug 2021. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effects of Dose Response of Nordic Hamstring Exercise on Muscle Strength, Agility and Speed in Athletes
- ClinicalTrials.gov ID
- NCT04668105
- Acronym / sponsor ID
- REC/00789 SaeedUllah
- Conditions
- Hamstring Injury
- Keywords
- Agility t test, Eccentric strength, Hamstring injuries, Nordic Hamstring exercises, Single leg Hamstring bridges
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 34 participants (actual)
- Lead sponsor
- Riphah International UniversityUniversity, hospital or other
- Study start
- 10 Aug 2020 (actual)
- Primary completion
- 30 Dec 2020 (actual)
- Study completion
- 30 Jan 2021 (actual)
- First posted
- 16 Dec 2020 (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 research is to compare the effects of dose response of Nordic hamstring exercise on muscle strength, agility and speed in athletes a randomized controlled trial done at JKD cricket academy and sports centre, Peshawar. The sample size was 34. The subjects were divided in two groups, 17 subjects in Group 1 which will do high volume Nordic hamstring exercise and 17 in Group 2 which will do low volume Nordic hamstring exercise. Study duration was of 6 months. Sampling technique applied was non probability purposive sampling technique. Only 18-30 years athletes with BMI between 18.5-24.5 kg/m2 were included. Tools used in the study are Single leg hamstring bridge (SLHB), Agility t-test, 30-m speed test and muscles size .Data will be analyzed through SPSS 21.
Detailed description
One of the most common injury in sports is the Hamstring injury, as hamstring is very susceptible to tears and strains. Hamstring muscle strain-type injuries are common in sports that involve high degree of speed, power and agility such as sprinters, soccer, basketball, tennis and football. Occurring in both recreational and professional sports, these injuries can result in substantial time lost from sport and commonly recur.
When sprinting, the hamstring muscles of the swing leg function concentrically as hip extensors to quickly swing the thigh back, whereas the same muscle group acts eccentrically as knee flexors to decelerate the forward swing leg. This last action is a probable contributing injury mechanism because of the increased peak hamstring musculotendinous stretch, activation, and active lengthening contraction of the hamstring muscles. The Nordic Hamstring Exercise (NHE) was previously termed the 'Russian hamstring exercise'. This is a partner exercise which can be performed easily on the pitch without special equipment. The NHE involves the player attempting to resist a forward-falling motion from a kneeling position, eccentrically contracting hamstring muscles and thought to replicate hamstring function during terminal swing phase. NHE is a preventive strategy which may reduce the incidence of hamstring injury, medical costs, and personal suffering of the injured player keeping in view the training exposure, training intensity, and compliance to preventive measures. Programs that include the NHE reduce hamstring injuries by up to 51%. The NHE essentially halves the rate of hamstring injuries across multiple sports in different athletes. Even in the face of promising NHE preventive effect shown by previous studies,adoption and implementation of the NHE programs is still low. Evidence show improvement in performance, agility and speed in athletes by NHE training but lowest dose of NHE required to enhance athletes' performance , agility and speed is yet to be found. This study attempts to investigate the lowest dose response of NHE by comparing the effects of high volumes of NHE with low volumes of NHE.
Literature review: Mjølsnes et al first demonstrated that a NHE program performed on the training environment of professional soccer players is more effective in developing maximal eccentric hamstring strength than a comparable program based on hamstring curl machine at the fitness center.
Three large prospective trials (two randomized and one non-randomized) reduced injuries by approximately 70% by implementing the NHE in a team's training regime. The results from the meta-analysis suggested that teams using the NHE (in isolation or as part of a larger injury prevention program) reduced hamstring injury rates up to 51%.
Brooks et al studied the effects of the NHE on the incidence and severity of hamstring strains among 546 professional rugby union players. The NH exercise group had a significantly lower hamstring injury rate and severity than the strengthening and the stretching/ strengthening group.
In a 2020, meta-analyses, positive outcomes were reported on jump performance, repeated sprint ability and agility of athletes after NHE protocol.
A study conducted for 6 weeks concluded that NHE resulted in significant improvements in eccentric strength of hamstrings and performance in 10 m sprinters and also in change of direction speed immediately after the training protocol. These improvements remained even after 3 weeks of detraining.
In a study NHE has shown improvements in strength and dynamic control after 10 weeks of training, a reduction in the maximum peak torque (when approaching full knee extension), and a lower incidence rate of hamstring injuries in athletes.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| High volume nordic hamstring exercise | Experimental | Other: High volume nordic hamstring exerciseHigh volume Nordic hamstring exercise |
| Low volume Nordic Hamstring exercise | Experimental | Other: Low volume nordic hamstring exerciseLow volume Nordic Hamstring exercise |
Who may qualify
- Ages
- 18 to 30 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult
Key inclusion criteria (2 listed)
- Athletes participating in games for at least 06 months
- BMI 18.5-24.5
Key exclusion criteria (4 listed)
- Have injuries (prior 6 months) or instability in knee
- Have recently had knee or hip surgery
- Are recovering from injury or surgery involving spine, or neck
- Have ruptured or torn ligaments in knee or ankle, such as Achilles tendon.
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 |
|---|---|---|
| High volume nordic hamstring exerciseTo perform Nordic Hamstring Curls, the person will kneel on a pad (for knee comfort) and lower under control, his ankles must be stabilized and kept in a place with the help of a partner, but can also use a moveable object or a loaded barbell can also be used to achieve the stability. The person must then extend his hamstrings in order to lean forward, he should lean forward from the knee and not from the hip. The movement must be kept controlled and slow. The person should go as forward/low as possible but without the help of hands or arms. The only time one can put his hands in front of him is when he can't rely on his legs and then push himself back to starting position and then repeat the procedure again.Group 1 will do the Nordic hamstring exercise with protocol 3 repetitions × 3sets× 3 times for 4 weeks. | Other | High volume nordic hamstring exercise |
| Low volume nordic hamstring exerciseTo perform Nordic Hamstring Curls, the person will kneel on a pad (for knee comfort) and lower under control, his ankles must be stabilized and kept in a place with the help of a partner, but can also use a moveable object or a loaded barbell can also be used to achieve the stability. The person must then extend his hamstrings in order to lean forward, he should lean forward from the knee and not from the hip. The movement must be kept controlled and slow. The person should go as forward/low as possible but without the help of hands or arms. The only time one can put his hands in front of him is when he can't rely on his legs and then push himself back to starting position and then repeat the procedure again. Group 2 will do the Nordic hamstring exercise with protocol 3 repetitions × 3 sets × 1 times for 4 weeks. | Other | Low volume Nordic Hamstring exercise |
Primary outcome
Single leg hamstring bridge test
Time frame: 4th week
Single leg hamstring bridge (SLHB) is a clinical test for hamstring function used at elite level for the screening programs. To perform this test, person lies on his back with bent knees, hip distance apart, and feet flat on mat stacked under the knees. Extend one leg long towards the ceiling. Squeeze glutes and lift hips off the mat into a bridge. Lower and lift the hips for desired number of repetitions and repeat on other side
3 secondary outcomes
Agility t- test
Time frame: 4th week
30-m speed test
Time frame: 4th week
Muscle size
Time frame: 4th week
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 27 Aug 2021.
- Background: PubMed 30808663van Dyk N, Behan FP, Whiteley R. Including the Nordic hamstring exercise in injury prevention programmes halves the rate of hamstring injuries: a systematic review and meta-analysis of 8459 athletes. Br J Sports Med. 2019 Nov;53(21):1362-1370. doi: 10.1136/bjsports-2018-100045. Epub 2019 Feb 26.
- Background: PubMed 25227125Goode AP, Reiman MP, Harris L, DeLisa L, Kauffman A, Beltramo D, Poole C, Ledbetter L, Taylor AB. Eccentric training for prevention of hamstring injuries may depend on intervention compliance: a systematic review and meta-analysis. Br J Sports Med. 2015 Mar;49(6):349-56. doi: 10.1136/bjsports-2014-093466. Epub 2014 Sep 16.
- Background: PubMed 27752982Al Attar WSA, Soomro N, Sinclair PJ, Pappas E, Sanders RH. Effect of Injury Prevention Programs that Include the Nordic Hamstring Exercise on Hamstring Injury Rates in Soccer Players: A Systematic Review and Meta-Analysis. Sports Med. 2017 May;47(5):907-916. doi: 10.1007/s40279-016-0638-2.
- Background: PubMed 8198197Jonhagen S, Nemeth G, Eriksson E. Hamstring injuries in sprinters. The role of concentric and eccentric hamstring muscle strength and flexibility. Am J Sports Med. 1994 Mar-Apr;22(2):262-6. doi: 10.1177/036354659402200218.
- Background: PubMed 23524362Mendiguchia J, Arcos AL, Garrues MA, Myer GD, Yanci J, Idoate F. The use of MRI to evaluate posterior thigh muscle activity and damage during nordic hamstring exercise. J Strength Cond Res. 2013 Dec;27(12):3426-35. doi: 10.1519/JSC.0b013e31828fd3e7.
- Background: PubMed 25794868van der Horst N, Smits DW, Petersen J, Goedhart EA, Backx FJ. The preventive effect of the nordic hamstring exercise on hamstring injuries in amateur soccer players: a randomized controlled trial. Am J Sports Med. 2015 Jun;43(6):1316-23. doi: 10.1177/0363546515574057. Epub 2015 Mar 20.
- Background: PubMed 23419911Krist MR, van Beijsterveldt AM, Backx FJ, de Wit GA. Preventive exercises reduced injury-related costs among adult male amateur soccer players: a cluster-randomised trial. J Physiother. 2013 Mar;59(1):15-23. doi: 10.1016/S1836-9553(13)70142-5.
- Background: PubMed 20956263Junge A, Lamprecht M, Stamm H, Hasler H, Bizzini M, Tschopp M, Reuter H, Wyss H, Chilvers C, Dvorak J. Countrywide campaign to prevent soccer injuries in Swiss amateur players. Am J Sports Med. 2011 Jan;39(1):57-63. doi: 10.1177/0363546510377424. Epub 2010 Oct 17.
- Background: PubMed 21825112Petersen J, Thorborg K, Nielsen MB, Budtz-Jorgensen E, Holmich P. Preventive effect of eccentric training on acute hamstring injuries in men's soccer: a cluster-randomized controlled trial. Am J Sports Med. 2011 Nov;39(11):2296-303. doi: 10.1177/0363546511419277. Epub 2011 Aug 8.
- Background: PubMed 28459795Ribeiro-Alvares JB, Marques VB, Vaz MA, Baroni BM. Four Weeks of Nordic Hamstring Exercise Reduce Muscle Injury Risk Factors in Young Adults. J Strength Cond Res. 2018 May;32(5):1254-1262. doi: 10.1519/JSC.0000000000001975.
- 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.
Aisha Razzaq, MSPT-OMPT principal investigator
Riphah International University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing High volume nordic hamstring exercise and Low volume nordic hamstring exercise in people with Hamstring Injury, run by Riphah International University at 1 site in Pakistan.
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 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: finished, as of the sponsor's last update on 27 Aug 2021. 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 Pakistan. 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?
Single leg hamstring bridge test (time frame: 4th week). 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 NCT04668105, which also lists 10 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 27 Aug 2021.