Sports Physical TherapyNCT07329348

Comparison of Accentuated Eccentric and Concentric Resistance Training in Athletes.

A study testing Accentuated eccentric resistance training ( group A) and Concentric Resistance training (group B) in people with Sports Physical Therapy, run by Riphah International University at 1 site in Pakistan.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record

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Trial summary

This study will be randomized clinical trial and will recruit male soccer players aged 18-30yrs.Participants will be randomly divided into two groups with each group performing their program 3 times per week for 8 weeks.Group A will engage in Accentuated Eccentric resistance training ,using resistance bands and Group… Read more about this study

Who is it for?: Ages 18 to 30 years, men onlyHealthy volunteers can take part
Conditions the study is for: Sports Physical Therapy
What is being tested?: Accentuated eccentric resistance training ( group A) and Concentric Resistance training (group B)
Could I receive a placebo?: No, everyone receives an active treatment
How many people: 79 participants
Where: 1 sitePakistan
Study dates: 21 Mar 2025to 2 Nov 2025
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
Men only
Healthy volunteers accepted
Adult

Who may be able to join

• Male soccer players
Age 18 to 30 years.
A minimum of two years of experience in Regular training
Athletes with BMI 18.5kg/m2 -24.9kg/m2

Who cannot join

• History of lower extremity surgeries (e.g., ACL reconstruction or any major surgery) in the past year
Athletes having consumption of Drugs which may influence Athlete performance.
Any systemic illness
Any musculoskeletal disorder
Pre-existing Cardiovascular and respiratory (exercise-induced asthma) conditions

Trial locations and contacts

1 site in 1 country.

Pakistan1 site

Model Town Football Club
Lahore, Punjab Province, 54000

Other trials in Pakistan

About this study

Official title: Comparison of Accentuated Eccentric and Concentric Resistance Training on Aerobic Capacity and Strength in Athletes.

Read the detailed description

Study Design: Randomized Clinical Trials Sample size: 78(39 for each group) Sampling technique: Non-probability, Purposive sampling technique

Study Setting:

Pakistan Football Federation, Lahore
Model town soccer club, Lahore

Inclusion criteria:

Male soccer players
Age 18 to 30 years.
A minimum of two years of experience in Regular training
Athletes with BMI 18.5kg/m2 -24.9kg/m2

Exclusion criteria:

History of lower extremity surgeries (e.g., ACL reconstruction or any major surgery) in the past year
Athletes having consumption of Drugs which may influence Athlete performance.
Any systemic illness
Any musculoskeletal disorder
Pre-existing Cardiovascular and respiratory (exercise-induced asthma) conditions

Tools:

Aerobic capacity:20-meter shuttle run test (ICC =0.96)
Muscle strength :1RM Back squat test (ICC=0.91-0.99)

Conditions: Sports Physical Therapy
Being tested: Accentuated eccentric resistance training ( group A), Concentric Resistance training (group B)
Keywords: Accentuated Eccentric, concentric, resistance training

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

Accentuated eccentric resistance training ( group A)Other
The AERT group performed eccentric resistance training by Elastic Resistance bands for 3 sessions per week for 8 weeks. Each session included 3 sets of 10 repetitions with 2-3 mints of rest interval between each set. Participants in this group start with Yellow band (light resistance) and progressing through to purple band (heavy resistance). The level of exercise progressively increased throughout the 8-week program, by increasing the strength of resistance bands. In group A, participants executed the Eccentric Phase for 2-4 seconds and Concentric phase for 1-2 seconds. 12 Comparison of accentuated eccentric and concentric resistance training in athletes
Concentric Resistance training (group B)Other
The CRT group performed concentric resistance training by Elastic Resistance bands for 3 sessions per week for 8 weeks. Each session included 3 sets of 10 repetitions with 2-3 mints of rest interval between each set. Participants in this group start with Yellow band (light resistance) and progressing through to purple band (heavy resistance). The level of exercise progressively increased throughout the 8-week program, by increasing the strength of resistance bands. In group B, participants executed the Concentric Phase for 2 4 seconds and Eccentric phase for 1-2 seconds.

Study groups in NCT07329348
Study group	Role	What they receive
Group A	Experimental	The AERT group performed eccentric resistance training by Elastic Resistance bands for 3 sessions per week for 8 weeks. Each session included 3 sets of 10 repetitions with 2-3 mints of rest interval between each set. Participants in this group start with Yellow band (light resistance) and progressing through to purple band (high resistance). The level of exercise progressively increased throughout the 8-week program, by increasing the resistance of resistance bands. In group A, participants executed the Eccentric Phase for 2-4 seconds and Concentric phase for 1-2 seconds. Receives: Other: Accentuated eccentric resistance training ( group A)
Group B	Experimental	The CRT group performed concentric resistance training by Elastic Resistance bands for 3 sessions per week for 8 weeks. Each session included 3 sets of 10 repetitions with 2-3 mints of rest interval between each set. Participants in this group start with Yellow band (light resistance) and progressing through to purple band (high resistance). The level of exercise progressively increased throughout the 8-week program, by increasing the resistance of resistance bands. In group B, participants executed the Concentric Phase for 2-4 seconds and Eccentric phase for 1-2 seconds. Receives: Other: Concentric Resistance training (group B)

What is being measured

The primary outcome is the main question the study is designed to answer.

1-RM Back Squat test
a warm up of 10 repetitions using an empty barbell in back squat position. After rest of 2 mints, Participants will perform same protocol with addition of (35 pounds) weight and goal is to perform maximum repetitions. At final phase, weight (35 pounds) and the maximum repetitions performed are counted. This count is then used in Epley formula to calculate the individual 1RM (32).
Epley's Formula:
1RM = weight x (1 + (reps / 30))
Measured: 8 weeks
20-MTR Shuttle Run test
The 20-meter shuttle run test, often called the "beep" or "bleep" test, requires participants to run back and forth continuously between two lines 20 meters apart, with a rhythm imposed by audio(beep). Starting at a slow pace, they must turn when signaled by the beeps. After about a minute, the pace increased, with the beeps occurring more quickly, requiring the runners to speed up. The speed increases each minute(level), with beeps becoming closer together. If a participant reaches the line before the beep, they must wait; if not, they receive a warning and have two more chances to catch up to the pace. A second warning results in elimination from the test. Calculation: VO2max = 18.043461 + (0.3689295 x TS) + (- 0.000349 x TS x TS)
Measured: 8 weeks

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

21 Mar 20252 Nov 2025

First posted9 Jan 2026
Study start21 Mar 2025
Primary completion2 Oct 2025
Study completion2 Nov 2025

Resources

Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
Publications (5)Papers the sponsor has linked to this study.
Other trials for Sports Physical TherapyStudies 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
Model description: randomized cinical trial
Masking: Single blind
Who is masked: Outcomes assessor
Enrolment: 79 participants (actual)

IDs, dates and publications

ClinicalTrials.gov ID: NCT07329348
Sponsor's protocol ID: REC/RCR&AHS/24/0481
Status last verified: Dec 2025
First submitted: 29 Dec 2025
Last updated: 9 Jan 2026
Results posted: No
Data monitoring committee: Yes
FDA-regulated drug: No
FDA-regulated device: No

Publications

Teoldo I, Dambroz F, Brito J. Performance of soccer players under acute physical fatigue: An approach based on cognitive, tactical and physical aspects. Heliyon. 2024 Apr 30;10(9):e30516. doi: 10.1016/j.heliyon.2024.e30516. eCollection 2024 May 15.
PubMed 38726114
Businari GB, de Camargo JBB, Barbosa PH, Brigatto FA, Aoki MS, Braz TV, Lopes CR. Chronic Effects of Heavy Load Activity Performed Before Resistance Training Sessions on the Physical Performance of Youth Soccer Players. Int J Exerc Sci. 2022 Feb 1;14(6):1421-1434. doi: 10.70252/SDEL8387. eCollection 2021.
PubMed 35514743
Leao C, Silva AF, Badicu G, Clemente FM, Carvutto R, Greco G, Cataldi S, Fischetti F. Body Composition Interactions with Physical Fitness: A Cross-Sectional Study in Youth Soccer Players. Int J Environ Res Public Health. 2022 Mar 18;19(6):3598. doi: 10.3390/ijerph19063598.
PubMed 35329288
Almaawi A, Awwad W, Bamugaddam A, Alasheikh M, Muaddi M, Almutair O, Alomar AZ. Prevalence of knee injuries among male college students in Riyadh, Kingdom of Saudi Arabia. J Orthop Surg Res. 2020 Mar 31;15(1):126. doi: 10.1186/s13018-020-01638-1.
PubMed 32238180
Tayfur B, Charuphongsa C, Morrissey D, Miller SC. Neuromuscular Function of the Knee Joint Following Knee Injuries: Does It Ever Get Back to Normal? A Systematic Review with Meta-Analyses. Sports Med. 2021 Feb;51(2):321-338. doi: 10.1007/s40279-020-01386-6.
PubMed 33247378

Want to know more?

The sponsor has not listed a contact. The official record may have more details.

Talk to your doctor first and take this page with you. Only the study team can confirm whether you can join.

Questions to ask the study team

What is the study trying to find out?
What would I need to do, and how often would I visit?
Could I receive a placebo instead of the treatment?
What are the possible risks and benefits for me?
Will it cost me anything? Are travel or time paid for?
Can I keep seeing my own doctor during the study?
What happens when the study ends?

See locations

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Study at a glance

From the registry record, last updated by the sponsor on 9 Jan 2026. Recruitment status is as the sponsor reported it: confirm with the study team.

Official title: Comparison of Accentuated Eccentric and Concentric Resistance Training on Aerobic Capacity and Strength in Athletes.
ClinicalTrials.gov ID: NCT07329348
Acronym / sponsor ID: REC/RCR&AHS/24/0481
Conditions: Sports Physical Therapy
Keywords: Accentuated Eccentric, concentric, resistance training
Study type: Interventional
Recruitment status: Completed
Enrolment: 79 participants (actual)
Lead sponsor: Riphah International UniversityUniversity, hospital or other
Study start: 21 Mar 2025 (actual)
Primary completion: 2 Oct 2025 (actual)
Study completion: 2 Nov 2025 (actual)
First posted: 9 Jan 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.

Detailed description

Study Design: Randomized Clinical Trials Sample size: 78(39 for each group) Sampling technique: Non-probability, Purposive sampling technique

Study Setting:

Pakistan Football Federation, Lahore
Model town soccer club, Lahore

Inclusion criteria:

Male soccer players
Age 18 to 30 years.
A minimum of two years of experience in Regular training
Athletes with BMI 18.5kg/m2 -24.9kg/m2

Exclusion criteria:

History of lower extremity surgeries (e.g., ACL reconstruction or any major surgery) in the past year
Athletes having consumption of Drugs which may influence Athlete performance.
Any systemic illness
Any musculoskeletal disorder
Pre-existing Cardiovascular and respiratory (exercise-induced asthma) conditions

Tools:

Aerobic capacity:20-meter shuttle run test (ICC =0.96)
Muscle strength :1RM Back squat test (ICC=0.91-0.99)

Study design

Primary purpose: Treatment
Allocation: Randomised
Intervention model: Parallel groups
Masking: Single blind (outcomes assessor)
Number of arms: 2
Model description: randomized cinical trial

Arm	Type	Receives
Group A	Experimental	Other: Accentuated eccentric resistance training ( group A)The AERT group performed eccentric resistance training by Elastic Resistance bands for 3 sessions per week for 8 weeks. Each session included 3 sets of 10 repetitions with 2-3 mints of rest interval between each set. Participants in this group start with Yellow band (light resistance) and progressing through to purple band (high resistance). The level of exercise progressively increased throughout the 8-week program, by increasing the resistance of resistance bands. In group A, participants executed the Eccentric Phase for 2-4 seconds and Concentric phase for 1-2 seconds.
Group B	Experimental	Other: Concentric Resistance training (group B)The CRT group performed concentric resistance training by Elastic Resistance bands for 3 sessions per week for 8 weeks. Each session included 3 sets of 10 repetitions with 2-3 mints of rest interval between each set. Participants in this group start with Yellow band (light resistance) and progressing through to purple band (high resistance). The level of exercise progressively increased throughout the 8-week program, by increasing the resistance of resistance bands. In group B, participants executed the Concentric Phase for 2-4 seconds and Eccentric phase for 1-2 seconds.

Who may qualify

Ages: 18 to 30 years
Sex: Male only
Healthy volunteers: Accepted
Age groups: Adult

Key inclusion criteria (4 listed)

• Male soccer players

Key exclusion criteria (5 listed)

• History of lower extremity surgeries (e.g., ACL reconstruction or any major surgery) in the past year

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
Accentuated eccentric resistance training ( group A)The AERT group performed eccentric resistance training by Elastic Resistance bands for 3 sessions per week for 8 weeks. Each session included 3 sets of 10 repetitions with 2-3 mints of rest interval between each set. Participants in this group start with Yellow band (light resistance) and progressing through to purple band (heavy resistance). The level of exercise progressively increased throughout the 8-week program, by increasing the strength of resistance bands. In group A, participants executed the Eccentric Phase for 2-4 seconds and Concentric phase for 1-2 seconds. 12 Comparison of accentuated eccentric and concentric resistance training in athletes	Other	Group A
Concentric Resistance training (group B)The CRT group performed concentric resistance training by Elastic Resistance bands for 3 sessions per week for 8 weeks. Each session included 3 sets of 10 repetitions with 2-3 mints of rest interval between each set. Participants in this group start with Yellow band (light resistance) and progressing through to purple band (heavy resistance). The level of exercise progressively increased throughout the 8-week program, by increasing the strength of resistance bands. In group B, participants executed the Concentric Phase for 2 4 seconds and Eccentric phase for 1-2 seconds.	Other	Group B

Primary outcome

1-RM Back Squat test
Time frame: 8 weeks
a warm up of 10 repetitions using an empty barbell in back squat position. After rest of 2 mints, Participants will perform same protocol with addition of (35 pounds) weight and goal is to perform maximum repetitions. At final phase, weight (35 pounds) and the maximum repetitions performed are counted. This count is then used in Epley formula to calculate the individual 1RM (32). Epley's Formula: 1RM = weight x (1 + (reps / 30))
20-MTR Shuttle Run test
Time frame: 8 weeks
The 20-meter shuttle run test, often called the "beep" or "bleep" test, requires participants to run back and forth continuously between two lines 20 meters apart, with a rhythm imposed by audio(beep). Starting at a slow pace, they must turn when signaled by the beeps. After about a minute, the pace increased, with the beeps occurring more quickly, requiring the runners to speed up. The speed increases each minute(level), with beeps becoming closer together. If a participant reaches the line before the beep, they must wait; if not, they receive a warning and have two more chances to catch up to the pace. A second warning results in elimination from the test. Calculation: VO2max = 18.043461 + (0.3689295 x TS) + (- 0.000349 x TS x TS)

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 9 Jan 2026.
Background: PubMed 38726114Teoldo I, Dambroz F, Brito J. Performance of soccer players under acute physical fatigue: An approach based on cognitive, tactical and physical aspects. Heliyon. 2024 Apr 30;10(9):e30516. doi: 10.1016/j.heliyon.2024.e30516. eCollection 2024 May 15.
Background: PubMed 35514743Businari GB, de Camargo JBB, Barbosa PH, Brigatto FA, Aoki MS, Braz TV, Lopes CR. Chronic Effects of Heavy Load Activity Performed Before Resistance Training Sessions on the Physical Performance of Youth Soccer Players. Int J Exerc Sci. 2022 Feb 1;14(6):1421-1434. doi: 10.70252/SDEL8387. eCollection 2021.
Background: PubMed 35329288Leao C, Silva AF, Badicu G, Clemente FM, Carvutto R, Greco G, Cataldi S, Fischetti F. Body Composition Interactions with Physical Fitness: A Cross-Sectional Study in Youth Soccer Players. Int J Environ Res Public Health. 2022 Mar 18;19(6):3598. doi: 10.3390/ijerph19063598.
Background: PubMed 32238180Almaawi A, Awwad W, Bamugaddam A, Alasheikh M, Muaddi M, Almutair O, Alomar AZ. Prevalence of knee injuries among male college students in Riyadh, Kingdom of Saudi Arabia. J Orthop Surg Res. 2020 Mar 31;15(1):126. doi: 10.1186/s13018-020-01638-1.
Background: PubMed 33247378Tayfur B, Charuphongsa C, Morrissey D, Miller SC. Neuromuscular Function of the Knee Joint Following Knee Injuries: Does It Ever Get Back to Normal? A Systematic Review with Meta-Analyses. Sports Med. 2021 Feb;51(2):321-338. doi: 10.1007/s40279-020-01386-6.

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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.

ayesha aslam, DPT principal investigator

Riphah International University

Muhammad faheem Afzal, MS-SPT 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?

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 4 inclusion and 5 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 9 Jan 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 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?

1-RM Back Squat test (time frame: 8 weeks). The study lists 2 primary outcomes in all. 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 NCT07329348, which also lists 5 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 9 Jan 2026.