Hip AdductionNCT07825194
The Effectiveness of Two Different Interventions on Hip Adduction Strength in Junior Floorball Players
A study testing Copenhagen Adductor Exercise and Adductor Slide in people with Hip Adduction and Hip Adduction Strength, run by Umeå University at 1 site in Sweden.
Trial summary
Study type The present study is a two- armed randomized controlled trial. Study setting and participants 50 floorball players in high-school level will be invited to participate. Read more about this study
- Who is it for?
- Ages 15 to 20 yearsHealthy volunteers can take part
- Conditions the study is for
- Hip Adduction, Hip Adduction Strength
- What is being tested?
- Copenhagen Adductor Exercise and Adductor Slide
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 49 participants
- Where
- 1 siteSweden
- Study dates
- 17 Jan 2025to 1 Jun 2026
- 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 15 to 20 years
- All sexes
- Healthy volunteers accepted
- Child, Adult
Who may be able to join
- Floorball players between 16-20 years old
- Not actively using any of the interventions in their daily training
Who cannot join
- Pain or injury to the lower extremities or lower back that hinders the person from performing the assigned intervention
Trial locations and contacts
1 site in 1 country.
About this study
Official title: The Effectiveness of Two Different Interventions on Hip Adduction Strength in Junior Floorball Players - A Randomized Controlled Trial
Study type The present study is a two- armed randomized controlled trial. Study setting and participants 50 floorball players in high-school level will be invited to participate. An a priori power calculation indicated that 40 participants are required to detect an effect size of 0,3, with a significance level of 0.05 and a statistical power of 80%.
Recruitment and study procedure The recruitment will be performed in two steps; (1) The project will be presented to responsible floorball coaches at one high-school with the aim to get consent to contact the players in their floorball group. (2) The Research Group will visit the players to ask for individual consent.
Read more
Baseline assessment Three assessments will be performed: (a) questionnaire including demographic data, injury history, history of adductor strength training and information dominant leg, history of lower limb and lower back problems and previous experience of groin specific strength training. (b) eccentric hip adductor strength measured with a handheld dynamometer (c) isometric hip adductor and abductor strength measured with the ForceFrame Strength System (VALD).
Randomization, stratification and statistical analysis Randomization will follow an individual-randomization procedure. Randomization will take place after completion of baseline strength measurements. Allocation followed a 1:1 ratio, where the two intervention groups are equal in size. All stratification follows the allocation described under "Randomization" above.
The following variables will be stratified: Sex, and eccentric hip adductor strength (measured with a handheld dynamometer) at baseline. Analyses will follow the intention-to-treat principle using mixed-effects models.
Intervention
The intervention will consist of two parallel groups:
- Progressive training program using the Copenhagen Adductor Exercise (CAE).
- Progressive training program using the Adductor Slide (AS). The interventions followed a progressive protocol. The exercise was incorporated into the participants' regular training and took approximately 10 minutes on the days the intervention was performed. The intervention protocol for both groups followed an 8-week progressive loading structure with gradual increases in training volume over time. During week 1, participants completed 2 sessions per week, performing 2 sets of 6 repetitions per side. In weeks 2 and 3, the number of repetitions was increased to 8 and 10 per side, respectively, while maintaining the same weekly frequency and number of sets. In week 4, the number of sets was increased from 2 to 3, while repetitions remained at 10 per side. During weeks 5 and 6, repetitions were further increased to 12 per side, followed by 15 repetitions per side during weeks 7 and 8. Overall, the protocol progressively increased training load by manipulating repetitions first, then sets, and finally maintaining a higher training volume in the final phase.
For both interventions, each repetition was performed with a 3-second eccentric phase and a 3-second concentric phase.
Implementation and adherence The intervention was supervised by the research group. Attendance was recorded at each intervention session.
Follow-up assessment Three assessments were performed: (a) questionnaire assessing how the players experienced the intervention, if any adverse events occured, their motivation to perform the intervention and if they experienced DOMS (delayed onset muscle soreness) during the intervention (b) eccentric hip adductor strength measured with a handheld dynamometer (c) isometric hip adductor and abductor strength measured with the ForceFrame Strength System (VALD).
Outcome variables and analyses. Between-group effects will be calculated. Main outcome variables will be;
- Eccentric hip adductor strength (measured with handheld dynamometer). The unit used will be Nm/kg.
- Isometric hip adductor and abductor strength (measured with the ForceFrame Strength System, VALD). The unit used will be Nm/kg.
- Ratio between isometric hip adductor and isometric hip abductor strength (measured with the ForceFrame Strength System, VALD). Percentage (i.e a measure of the strength balance between the hip adductors and abductors. Lower values indicate relatively weaker adductors compared with abductors) will be calculated to express this ratio. Potential confounders that will be analyzed as interactions will include;
- Attendance to the intervention
- Motivation to perform the intervention
- Experienced DOMS
- Contamination (i.e if the participant performed hip adductor specific training outside the intervention).
- Conditions
- Hip Adduction, Hip Adduction Strength
- Being tested
- Copenhagen Adductor Exercise, Adductor Slide
- Keywords
- Hip, Groin, Adductor Strength, Copenhagen Adductor, Adductor Slide, Adductor, Hip Strength
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Copenhagen Adductor ExerciseOther
Also called CAE
The Copenhagen Adductor Exercise is performed with a partner and primarily targets the hip adductor muscles. The athlete begins in a side plank position with the lower forearm placed directly under the shoulder and the body held in a straight line. A partner stands beside the athlete and supports the upper leg by holding the ankle and, if needed, the knee. The lower leg remains free beneath the body. From the starting position, the athlete lifts the body upward by pressing the supported upper leg down into the partner's hands while simultaneously raising the lower leg to meet the upper leg. The body should remain straight and stable throughout the movement, with the hips kept elevated and aligned. The athlete then slowly lowers the lower leg back to the starting position in a controlled manner while maintaining trunk stability. After completing the prescribed repetitions on one side, the exercise is repeated on the opposite side.
Adductor SlideOther
The Adductor Slide is performed in standing and targets the hip adductors while also challenging balance and trunk control. The athlete stands with one foot on a sliding surface and the other firmly planted on the floor. A resistance band is placed around the ankle of the sliding leg and positioned to pull the leg laterally away from the body. The athlete slowly slides the leg out to the side while bending the stance leg into a controlled side-lunge position, keeping the trunk upright and pelvis stable. The sliding leg is then actively pulled back to the starting position against the resistance of the band using the hip adductor muscles. The movement should be slow and controlled. After completing the prescribed repetitions, the exercise is repeated on the opposite side. Each repetition is performed with a 3-second eccentric phase and a 3-second concentric phase.
| Study group | Role | What they receive |
|---|---|---|
| Copenhagen Adductor Exercise | Active comparator | The Copenhagen Adduction exercise protocol followed an 8-week progressive loading structure with gradual increases in training volume over time. During week 1, participants completed 2 sessions per week, performing 2 sets of 6 repetitions per side. In weeks 2 and 3, the number of repetitions was increased to 8 and 10 per side, respectively, while maintaining the same weekly frequency and number of sets. In week 4, the number of sets was increased from 2 to 3, while repetitions remained at 10 per side. During weeks 5 and 6, repetitions were further increased to 12 per side, followed by 15 repetitions per side during weeks 7 and 8. Overall, the protocol progressively increased training load by manipulating repetitions first, then sets, and finally maintaining a higher training volume in the final phase. Each repetition is performed with a 3-second eccentric phase and a 3-second concentric phase. Receives: Other: Copenhagen Adductor Exercise |
| Adductor Slide | Active comparator | The Adductor Slide exercise protocol followed an 8-week progressive loading structure with gradual increases in training volume over time. During week 1, participants completed 2 sessions per week, performing 2 sets of 6 repetitions per side. In weeks 2 and 3, the number of repetitions was increased to 8 and 10 per side, respectively, while maintaining the same weekly frequency and number of sets. In week 4, the number of sets was increased from 2 to 3, while repetitions remained at 10 per side. During weeks 5 and 6, repetitions were further increased to 12 per side, followed by 15 repetitions per side during weeks 7 and 8. Overall, the protocol progressively increased training load by manipulating repetitions first, then sets, and finally maintaining a higher training volume in the final phase. Receives: Other: Adductor Slide |
What is being measured
The primary outcome is the main question the study is designed to answer.
Changes in eccentric adduction strength after 8 week training period
Eccentric adduction strength measured with a handheld dynamometer
Measured: Measured at baseline (pre intervention) and directly after the intervention (post intervention). Post intervention = Intervention ends on a Friday, post-intervention testing will be performed during the upcoming 14 days.
Secondary outcomes (2)
Changes in isometric adduction strength and abduction strength after 8 week training period
Isometric adductor strength and abductor strength measured with a stationary strength testing system (VALD ForceFrame)
Measured: Pre and post intervention. Pre Intervention = Maximum 14 days before the intervention starts. Post intervention = Intervention ends on a Friday, post-intervention testing will be performed during the upcoming 14 days.
Changes in ratio between isometric adduction strength and abduction strength after 8 week training period
Ratio between isometric adduction strength and abduction strength measured with a stationary strength testing system (VALD ForceFrame)
Measured: Measured at baseline (pre intervention) and directly after the intervention (post intervention). Post intervention = Intervention ends on a Friday, post-intervention testing will be performed during the upcoming 14 days.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted17 Sep 2026
- Study start17 Jan 2025
- Primary completion1 Jun 2026
- Study completion1 Jun 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Hip AdductionStudies of the same condition, open and under way.
- More trials run by Umeå 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
- Other
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Model description
- Two (2) parallel groups that perform two different interventions.
- Masking
- None (open label)
- Enrolment
- 49 participants (actual)
Sponsor and investigators
- Lead sponsor
- Umeå University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Kajsa Gilenstam, Umeå University
- Investigators
- Kajsa Gilenstam, PhD, Principal investigator, Umeå UniversityApostolos Theos, PhD, Principal investigator, Umeå University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07825194
- Sponsor's protocol ID
- Dnr 2024-07167-01
- Status last verified
- Jun 2026
- First submitted
- 1 Jun 2026
- Last updated
- 17 Sep 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No: All researchers that will be working with this data are stated in this registration
Study at a glance
From the registry record, last updated by the sponsor on 17 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Effectiveness of Two Different Interventions on Hip Adduction Strength in Junior Floorball Players - A Randomized Controlled Trial
- ClinicalTrials.gov ID
- NCT07825194
- Acronym / sponsor ID
- Dnr 2024-07167-01
- Conditions
- Hip Adduction, Hip Adduction Strength
- Keywords
- Hip, Groin, Adductor Strength, Copenhagen Adductor, Adductor Slide, Adductor, Hip Strength
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 49 participants (actual)
- Lead sponsor
- Umeå UniversityUniversity, hospital or other
- Study start
- 17 Jan 2025 (actual)
- Primary completion
- 1 Jun 2026 (actual)
- Study completion
- 1 Jun 2026 (actual)
- First posted
- 17 Sep 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.
Study type The present study is a two- armed randomized controlled trial. Study setting and participants 50 floorball players in high-school level will be invited to participate. An a priori power calculation indicated that 40 participants are required to detect an effect size of 0,3, with a significance level of 0.05 and a statistical power of 80%.
Recruitment and study procedure The recruitment will be performed in two steps; (1) The project will be presented to responsible floorball coaches at one high-school with the aim to get consent to contact the players in their floorball group. (2) The Research Group will visit the players to ask for individual consent.
Baseline assessment Three assessments will be performed: (a) questionnaire including demographic data, injury history, history of adductor strength training and information dominant leg, history of lower limb and lower back problems and previous experience of groin specific strength training. (b) eccentric hip adductor strength measured with a handheld dynamometer (c) isometric hip adductor and abductor strength measured with the ForceFrame Strength System (VALD).
Randomization, stratification and statistical analysis Randomization will follow an individual-randomization procedure. Randomization will take place after completion of baseline strength measurements. Allocation followed a 1:1 ratio, where the two intervention groups are equal in size. All stratification follows the allocation described under "Randomization" above.
The following variables will be stratified: Sex, and eccentric hip adductor strength (measured with a handheld dynamometer) at baseline. Analyses will follow the intention-to-treat principle using mixed-effects models.
Intervention
The intervention will consist of two parallel groups:
- Progressive training program using the Copenhagen Adductor Exercise (CAE).
- Progressive training program using the Adductor Slide (AS). The interventions followed a progressive protocol. The exercise was incorporated into the participants' regular training and took approximately 10 minutes on the days the intervention was performed. The intervention protocol for both groups followed an 8-week progressive loading structure with gradual increases in training volume over time. During week 1, participants completed 2 sessions per week, performing 2 sets of 6 repetitions per side. In weeks 2 and 3, the number of repetitions was increased to 8 and 10 per side, respectively, while maintaining the same weekly frequency and number of sets. In week 4, the number of sets was increased from 2 to 3, while repetitions remained at 10 per side. During weeks 5 and 6, repetitions were further increased to 12 per side, followed by 15 repetitions per side during weeks 7 and 8. Overall, the protocol progressively increased training load by manipulating repetitions first, then sets, and finally maintaining a higher training volume in the final phase.
For both interventions, each repetition was performed with a 3-second eccentric phase and a 3-second concentric phase.
Implementation and adherence The intervention was supervised by the research group. Attendance was recorded at each intervention session.
Follow-up assessment Three assessments were performed: (a) questionnaire assessing how the players experienced the intervention, if any adverse events occured, their motivation to perform the intervention and if they experienced DOMS (delayed onset muscle soreness) during the intervention (b) eccentric hip adductor strength measured with a handheld dynamometer (c) isometric hip adductor and abductor strength measured with the ForceFrame Strength System (VALD).
Outcome variables and analyses. Between-group effects will be calculated. Main outcome variables will be;
- Eccentric hip adductor strength (measured with handheld dynamometer). The unit used will be Nm/kg.
- Isometric hip adductor and abductor strength (measured with the ForceFrame Strength System, VALD). The unit used will be Nm/kg.
- Ratio between isometric hip adductor and isometric hip abductor strength (measured with the ForceFrame Strength System, VALD). Percentage (i.e a measure of the strength balance between the hip adductors and abductors. Lower values indicate relatively weaker adductors compared with abductors) will be calculated to express this ratio. Potential confounders that will be analyzed as interactions will include;
- Attendance to the intervention
- Motivation to perform the intervention
- Experienced DOMS
- Contamination (i.e if the participant performed hip adductor specific training outside the intervention).
Study design
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
- Model description
- Two (2) parallel groups that perform two different interventions.
| Arm | Type | Receives |
|---|---|---|
| Copenhagen Adductor Exercise | Active comparator | Other: Copenhagen Adductor ExerciseThe Copenhagen Adduction exercise protocol followed an 8-week progressive loading structure with gradual increases in training volume over time. During week 1, participants completed 2 sessions per week, performing 2 sets of 6 repetitions per side. In weeks 2 and 3, the number of repetitions was increased to 8 and 10 per side, respectively, while maintaining the same weekly frequency and number of sets. In week 4, the number of sets was increased from 2 to 3, while repetitions remained at 10 per side. During weeks 5 and 6, repetitions were further increased to 12 per side, followed by 15 repetitions per side during weeks 7 and 8. Overall, the protocol progressively increased training load by manipulating repetitions first, then sets, and finally maintaining a higher training volume in the final phase. Each repetition is performed with a 3-second eccentric phase and a 3-second concentric phase. |
| Adductor Slide | Active comparator | Other: Adductor SlideThe Adductor Slide exercise protocol followed an 8-week progressive loading structure with gradual increases in training volume over time. During week 1, participants completed 2 sessions per week, performing 2 sets of 6 repetitions per side. In weeks 2 and 3, the number of repetitions was increased to 8 and 10 per side, respectively, while maintaining the same weekly frequency and number of sets. In week 4, the number of sets was increased from 2 to 3, while repetitions remained at 10 per side. During weeks 5 and 6, repetitions were further increased to 12 per side, followed by 15 repetitions per side during weeks 7 and 8. Overall, the protocol progressively increased training load by manipulating repetitions first, then sets, and finally maintaining a higher training volume in the final phase. |
Who may qualify
- Ages
- 15 to 20 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult
Key inclusion criteria (2 listed)
- Floorball players between 16-20 years old
- Not actively using any of the interventions in their daily training
Key exclusion criteria (1 listed)
- Pain or injury to the lower extremities or lower back that hinders the person from performing the assigned intervention
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 |
|---|---|---|
| Copenhagen Adductor ExerciseAlso: CAEThe Copenhagen Adductor Exercise is performed with a partner and primarily targets the hip adductor muscles. The athlete begins in a side plank position with the lower forearm placed directly under the shoulder and the body held in a straight line. A partner stands beside the athlete and supports the upper leg by holding the ankle and, if needed, the knee. The lower leg remains free beneath the body. From the starting position, the athlete lifts the body upward by pressing the supported upper leg down into the partner's hands while simultaneously raising the lower leg to meet the upper leg. The body should remain straight and stable throughout the movement, with the hips kept elevated and aligned. The athlete then slowly lowers the lower leg back to the starting position in a controlled manner while maintaining trunk stability. After completing the prescribed repetitions on one side, the exercise is repeated on the opposite side. | Other | Copenhagen Adductor Exercise |
| Adductor SlideThe Adductor Slide is performed in standing and targets the hip adductors while also challenging balance and trunk control. The athlete stands with one foot on a sliding surface and the other firmly planted on the floor. A resistance band is placed around the ankle of the sliding leg and positioned to pull the leg laterally away from the body. The athlete slowly slides the leg out to the side while bending the stance leg into a controlled side-lunge position, keeping the trunk upright and pelvis stable. The sliding leg is then actively pulled back to the starting position against the resistance of the band using the hip adductor muscles. The movement should be slow and controlled. After completing the prescribed repetitions, the exercise is repeated on the opposite side. Each repetition is performed with a 3-second eccentric phase and a 3-second concentric phase. | Other | Adductor Slide |
Primary outcome
Changes in eccentric adduction strength after 8 week training period
Time frame: Measured at baseline (pre intervention) and directly after the intervention (post intervention). Post intervention = Intervention ends on a Friday, post-intervention testing will be performed during the upcoming 14 days.
Eccentric adduction strength measured with a handheld dynamometer
2 secondary outcomes
Changes in isometric adduction strength and abduction strength after 8 week training period
Time frame: Pre and post intervention. Pre Intervention = Maximum 14 days before the intervention starts. Post intervention = Intervention ends on a Friday, post-intervention testing will be performed during the upcoming 14 days.
Changes in ratio between isometric adduction strength and abduction strength after 8 week training period
Time frame: Measured at baseline (pre intervention) and directly after the intervention (post intervention). Post intervention = Intervention ends on a Friday, post-intervention testing will be performed during the upcoming 14 days.
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 17 Sep 2026.
- Individual participant dataSharing planned: No. All researchers that will be working with this data are stated in this registration
Related trials for Hip Adduction
Recruiting
Hip Abduction and Adduction During Neurodynamic Stretching
Stretching, Control Condition
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.
Kajsa Gilenstam, PhD principal investigator
Umeå University
Apostolos Theos, PhD principal investigator
Umeå 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 Copenhagen Adductor Exercise and Adductor Slide in people with Hip Adduction and Hip Adduction Strength, run by Umeå University at 1 site in Sweden.
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 1 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 17 Sep 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 Sweden. 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?
Changes in eccentric adduction strength after 8 week training period (time frame: Measured at baseline (pre intervention) and directly after the intervention (post intervention). Post intervention = Intervention ends on a Friday, post-intervention testing will be performed during the upcoming 14 days.). 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 17 Sep 2026.