Eccentric Exercise TrainingNCT07421986
Elastic Band Exercise to Improve Hip Strength and Agility in Young Basketball Players
A study testing Eccentric Hip Adductor Strengthening with Elastic Bands in people with Eccentric Exercise Training and Strength Training Effects, run by Nebojša Trajković at 1 site in Serbia.
Trial summary
Here is the complete Brief Summary entry in a single paragraph, written in plain language, and excluding the study results (as requested), but maintaining academic rigor in describing the study design: The purpose of this study is to evaluate the effect of a 4-week short-term eccentric strengthening program using… Read more about this study
- Who is it for?
- Ages 15 to 18 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Eccentric Exercise Training, Strength Training Effects, Strengthening Exercises
- What is being tested?
- Eccentric Hip Adductor Strengthening with Elastic Bands
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 21 participants
- Where
- 1 siteSerbia
- Study dates
- 10 Jan 2024to 1 Mar 2024
- 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 18 years
- Men only
- Healthy volunteers accepted
- Child, Adult
Who may be able to join
- Healthy young male basketball players.
- Must be a participant in a sub-elite basketball team.
- Age: 15-18 years
Who cannot join
- Injury and/or pain in the knee, hip, groin, and/or lower back within the last six months
- Previous history of hip-adductor exercises performed in the preceding six months
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Does Short-Term Eccentric Strengthening With Elastic Bands Improve Hip Adductor Strength in Young Basketball Players?
Here is the complete Brief Summary entry in a single paragraph, written in plain language, and excluding the study results (as requested), but maintaining academic rigor in describing the study design:
The purpose of this study is to evaluate the effect of a 4-week short-term eccentric strengthening program using elastic bands on both hip adductor muscle strength and agility performance in young male basketball players. For this randomized controlled trial, twenty-one healthy young male athletes were separated by chance into two conditions: a training group, which performed the 4-week elastic band protocol in addition to their regular basketball training, and a control group, which engaged exclusively in their routine training. The primary measurements for comparison were maximal eccentric and isometric hip adduction strength (using a hand-held dynamometer) and the agility T-test. It is hypothesized that this targeted eccentric strengthening will lead to a significant enhancement of both hip adduction strength and overall athletic performance in the intervention group
Read the detailed description
The incidence of lower-limb and groin injuries in professional basketball is significant, with weak hip adductor strength identified as a major risk factor. While eccentric strengthening programs have shown promise in athletic populations, there is a clear gap in the literature regarding the effectiveness of short-term hip-adduction strengthening using available tools like elastic bands in young basketball players. This study was thus designed as a rigorous randomized controlled trial to investigate this specific intervention.
This study was a 4-week Interventional Randomized Controlled Trial (RCT) involving 21 healthy young male basketball players. Participants were recruited from a single sub-elite team and were excluded if they had any history of lower-limb injury (knee, hip, groin, lower back) in the preceding six months, or if they had performed any systematic hip adductor exercises during that period. Participants were randomized into two groups, paired based on their initial isometric hip adduction force. The Training Group (TG) conducted a supervised hip adduction protocol using Tuber-Band elastic bands. This program was performed 2-3 times per week for 4 weeks, in addition to their regular basketball training. The exercise involved a full range of motion in a standing position, incorporating three distinct contraction phases: a 3-second concentric contraction, a 2-second isometric hold, and a 3-second eccentric return phase. The load was individually adjusted to the 8-15 Repetition Maximum (RM) target to ensure progressive resistance throughout the program.
All measurements were performed pre- and post-intervention by an experienced rater. Primary outcome measures included maximal eccentric hip adduction strength (EHAD) and agility T-test time. Secondary outcome measures included maximal isometric hip adduction strength (IHAD) and isometric hip abduction strength (IHAB).
Strength was quantified using a hand-held dynamometer (HHD), performing a make test for isometric strength and a break test for eccentric strength. Agility was assessed objectively using photocell gates for the T-test. Data were analyzed using a 2×2 Analysis of Variance (ANOVA) with repeated measures (group × time) to assess training-related effects. Effect sizes (Cohen's d) were also calculated and reported.
- Conditions
- Eccentric Exercise Training, Strength Training Effects, Strengthening Exercises, Hip Adduction Strength, Healthy Participants
- Being tested
- Eccentric Hip Adductor Strengthening with Elastic Bands
- Keywords
- elastic band, resistance training, lower limb muscle, hip adductor
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Eccentric Hip Adductor Strengthening with Elastic BandsBehavioural
The training was performed in a standing position, focusing on eccentric hip adduction. The participant started from full hip-abduction. A single repetition consisted of a 3-second concentric contraction (adduction), followed by a 2-second isometric contraction, and then a 3-second eccentric movement (abduction) back to full hip-abduction, with a 2-second pause before the next repetition. The intervention spanned 4 weeks, with the training frequency and intensity progressively increasing. Load (elastic band resistance and fixation distance) was individually determined one week prior to the intervention based on repetition maximum (RM) sets. During Week 1, participants trained 2 times per week, performing 3 sets per leg at 15 RM. This progressed to 3 sessions per week for Weeks 2 and 3, with the load increasing to 10 RM (3 sets per leg). Finally, in Week 4, the frequency remained at 3 sessions per week, and the intensity was further increased to 8 RM (3 sets per leg).
| Study group | Role | What they receive |
|---|---|---|
| Training group, Elastic Band Training Group, Eccentric Strengthening Group | Experimental | Four-week eccentric and isometric hip-adduction training using elastic bands. Training sessions were supervised group sessions performed 2-3 times per week (2x/week in week 1; 3x/week in weeks 2-4) prior to regular basketball training. The exercise was performed in a standing position using elastic bands. Each repetition involved a 3-second concentric contraction, a 2-second isometric contraction, and a 3-second eccentric (hip-adduction) movement until full hip-abduction. The training load progressed from 3 sets of 15 RM in week 1, to 3 sets of 10 RM in weeks 2-3, and finally 3 sets of 8 RM in week 4. Both legs were trained Receives: Behavioral: Eccentric Hip Adductor Strengthening with Elastic Bands |
| Contro group (CG), Regular Training Control | No intervention | The Control Group (CG) continued with their regular basketball training. This included five basketball training sessions and one competitive game per week, which was the same frequency as the training group. |
What is being measured
The primary outcome is the main question the study is designed to answer.
Maximal Eccentric Hip Adduction Strength (EHAD)
Maximum force (in kilograms) produced during an eccentric contraction of the hip adductor muscles, measured using a hand-held dynamometer (HHD) in a side-lying position on the dominant leg.
Measured: Baseline (Pre-intervention) and 4 Weeks (Post-intervention)
Secondary outcomes (3)
Maximal Isometric Hip Adduction Strength (IHAD)
Maximum force (in kilograms) produced during an isometric contraction of the hip adductor muscles, measured using a hand-held dynamometer (HHD) in a supine lying position on the dominant leg.
Measured: Baseline (Pre-intervention) and 4 Weeks (Post-intervention)
Isometric Hip Abduction Strength (IHAB)
Maximum force (in kilograms) produced during an isometric contraction of the hip abductor muscles, measured using a hand-held dynamometer (HHD) in a supine lying position on the dominant leg.
Measured: Baseline (Pre-intervention) and 4 Weeks (Post-intervention)
Agility T-test Time
Time (in seconds) required to complete the Agility T-test, measured using photocell gates. The test involves a straight run, lateral shuffling, and hand-touching of cones.
Measured: Baseline (Pre-intervention) and 4 Weeks (Post-intervention)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted19 Feb 2026
- Study start10 Jan 2024
- Primary completion10 Feb 2024
- Study completion1 Mar 2024
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Eccentric Exercise TrainingStudies 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
- 21 participants (actual)
Sponsor and investigators
- Lead sponsor
- Nebojša Trajković
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor-investigator, Nebojša Trajković, University of Nis
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07421986
- Sponsor's protocol ID
- 04-2059/3
- Status last verified
- Feb 2026
- First submitted
- 12 Feb 2026
- Last updated
- 19 Feb 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No: Individual participant data (IPD) will not be shared with other researchers. All data used to generate the findings is already provided within the published manuscript and supplementary information files.
Study at a glance
From the registry record, last updated by the sponsor on 19 Feb 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Does Short-Term Eccentric Strengthening With Elastic Bands Improve Hip Adductor Strength in Young Basketball Players?
- ClinicalTrials.gov ID
- NCT07421986
- Acronym / sponsor ID
- 04-2059/3
- Conditions
- Eccentric Exercise Training, Strength Training Effects, Strengthening Exercises, Hip Adduction Strength, Healthy Participants
- Keywords
- elastic band, resistance training, lower limb muscle, hip adductor
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 21 participants (actual)
- Lead sponsor
- Nebojša TrajkovićUniversity, hospital or other
- Study start
- 10 Jan 2024 (actual)
- Primary completion
- 10 Feb 2024 (actual)
- Study completion
- 1 Mar 2024 (actual)
- First posted
- 19 Feb 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.
Here is the complete Brief Summary entry in a single paragraph, written in plain language, and excluding the study results (as requested), but maintaining academic rigor in describing the study design:
The purpose of this study is to evaluate the effect of a 4-week short-term eccentric strengthening program using elastic bands on both hip adductor muscle strength and agility performance in young male basketball players. For this randomized controlled trial, twenty-one healthy young male athletes were separated by chance into two conditions: a training group, which performed the 4-week elastic band protocol in addition to their regular basketball training, and a control group, which engaged exclusively in their routine training. The primary measurements for comparison were maximal eccentric and isometric hip adduction strength (using a hand-held dynamometer) and the agility T-test. It is hypothesized that this targeted eccentric strengthening will lead to a significant enhancement of both hip adduction strength and overall athletic performance in the intervention group
Detailed description
The incidence of lower-limb and groin injuries in professional basketball is significant, with weak hip adductor strength identified as a major risk factor. While eccentric strengthening programs have shown promise in athletic populations, there is a clear gap in the literature regarding the effectiveness of short-term hip-adduction strengthening using available tools like elastic bands in young basketball players. This study was thus designed as a rigorous randomized controlled trial to investigate this specific intervention.
This study was a 4-week Interventional Randomized Controlled Trial (RCT) involving 21 healthy young male basketball players. Participants were recruited from a single sub-elite team and were excluded if they had any history of lower-limb injury (knee, hip, groin, lower back) in the preceding six months, or if they had performed any systematic hip adductor exercises during that period. Participants were randomized into two groups, paired based on their initial isometric hip adduction force. The Training Group (TG) conducted a supervised hip adduction protocol using Tuber-Band elastic bands. This program was performed 2-3 times per week for 4 weeks, in addition to their regular basketball training. The exercise involved a full range of motion in a standing position, incorporating three distinct contraction phases: a 3-second concentric contraction, a 2-second isometric hold, and a 3-second eccentric return phase. The load was individually adjusted to the 8-15 Repetition Maximum (RM) target to ensure progressive resistance throughout the program.
All measurements were performed pre- and post-intervention by an experienced rater. Primary outcome measures included maximal eccentric hip adduction strength (EHAD) and agility T-test time. Secondary outcome measures included maximal isometric hip adduction strength (IHAD) and isometric hip abduction strength (IHAB).
Strength was quantified using a hand-held dynamometer (HHD), performing a make test for isometric strength and a break test for eccentric strength. Agility was assessed objectively using photocell gates for the T-test. Data were analyzed using a 2×2 Analysis of Variance (ANOVA) with repeated measures (group × time) to assess training-related effects. Effect sizes (Cohen's d) were also calculated and reported.
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Training group, Elastic Band Training Group, Eccentric Strengthening Group | Experimental | Behavioral: Eccentric Hip Adductor Strengthening with Elastic BandsFour-week eccentric and isometric hip-adduction training using elastic bands. Training sessions were supervised group sessions performed 2-3 times per week (2x/week in week 1; 3x/week in weeks 2-4) prior to regular basketball training. The exercise was performed in a standing position using elastic bands. Each repetition involved a 3-second concentric contraction, a 2-second isometric contraction, and a 3-second eccentric (hip-adduction) movement until full hip-abduction. The training load progressed from 3 sets of 15 RM in week 1, to 3 sets of 10 RM in weeks 2-3, and finally 3 sets of 8 RM in week 4. Both legs were trained |
| Contro group (CG), Regular Training Control | No intervention | –The Control Group (CG) continued with their regular basketball training. This included five basketball training sessions and one competitive game per week, which was the same frequency as the training group. |
Who may qualify
- Ages
- 15 to 18 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult
Key inclusion criteria (3 listed)
- Healthy young male basketball players.
- Must be a participant in a sub-elite basketball team.
- Age: 15-18 years
Key exclusion criteria (2 listed)
- Injury and/or pain in the knee, hip, groin, and/or lower back within the last six months
- Previous history of hip-adductor exercises performed in the preceding six months
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 Hip Adductor Strengthening with Elastic BandsThe training was performed in a standing position, focusing on eccentric hip adduction. The participant started from full hip-abduction. A single repetition consisted of a 3-second concentric contraction (adduction), followed by a 2-second isometric contraction, and then a 3-second eccentric movement (abduction) back to full hip-abduction, with a 2-second pause before the next repetition. The intervention spanned 4 weeks, with the training frequency and intensity progressively increasing. Load (elastic band resistance and fixation distance) was individually determined one week prior to the intervention based on repetition maximum (RM) sets. During Week 1, participants trained 2 times per week, performing 3 sets per leg at 15 RM. This progressed to 3 sessions per week for Weeks 2 and 3, with the load increasing to 10 RM (3 sets per leg). Finally, in Week 4, the frequency remained at 3 sessions per week, and the intensity was further increased to 8 RM (3 sets per leg). | Behavioural | Training group, Elastic Band Training Group, Eccentric Strengthening Group |
Primary outcome
Maximal Eccentric Hip Adduction Strength (EHAD)
Time frame: Baseline (Pre-intervention) and 4 Weeks (Post-intervention)
Maximum force (in kilograms) produced during an eccentric contraction of the hip adductor muscles, measured using a hand-held dynamometer (HHD) in a side-lying position on the dominant leg.
3 secondary outcomes
Maximal Isometric Hip Adduction Strength (IHAD)
Time frame: Baseline (Pre-intervention) and 4 Weeks (Post-intervention)
Isometric Hip Abduction Strength (IHAB)
Time frame: Baseline (Pre-intervention) and 4 Weeks (Post-intervention)
Agility T-test Time
Time frame: Baseline (Pre-intervention) and 4 Weeks (Post-intervention)
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 19 Feb 2026.
- Individual participant dataSharing planned: No. Individual participant data (IPD) will not be shared with other researchers. All data used to generate the findings is already provided within the published manuscript and supplementary information files.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Eccentric Hip Adductor Strengthening with Elastic Bands in people with Eccentric Exercise Training and Strength Training Effects, run by Nebojša Trajković at 1 site in Serbia.
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 3 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 19 Feb 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 Serbia. 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?
Maximal Eccentric Hip Adduction Strength (EHAD) (time frame: Baseline (Pre-intervention) and 4 Weeks (Post-intervention)). 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 19 Feb 2026.