Comparison of Accentuated Eccentric and Concentric Resistance Training in Athletes.

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

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 B will participate in Concentric Reistance training ,with similar resistance bands.

Study Overview

• Status: Completed
• Conditions: Sports Physical Therapy
• Intervention / Treatment: Other: Accentuated eccentric resistance training ( group A); Other: Concentric Resistance training (group B)

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 Type: Interventional
• Enrollment (Actual): 79
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Pakistan
  • Punjab Province
    • Lahore, Punjab Province, Pakistan, 54000
      • Model Town Football Club

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult
• Accepts Healthy Volunteers: Yes

Description

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

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Single

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: 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.	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 (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
Experimental: 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.	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 (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.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
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))	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)	8 weeks

Collaborators and Investigators

• Sponsor: Riphah International University
• Investigators: Principal Investigator: ayesha aslam, DPT, Riphah International University; Principal Investigator: Muhammad faheem Afzal, MS-SPT, Riphah International University

Publications and helpful links

General Publications

• 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.
• 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.
• 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.
• 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.
• 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.

Study record dates

Study Major Dates

• Study Start (Actual): March 21, 2025
• Primary Completion (Actual): October 2, 2025
• Study Completion (Actual): November 2, 2025

Study Registration Dates

• First Submitted: December 29, 2025
• First Submitted That Met QC Criteria: December 29, 2025
• First Posted (Actual): January 9, 2026

Study Record Updates

• Last Update Posted (Actual): January 9, 2026
• Last Update Submitted That Met QC Criteria: December 29, 2025
• Last Verified: December 1, 2025

More Information

Terms related to this study

• Keywords: resistance training; concentric; Accentuated Eccentric
• Other Study ID Numbers: REC/RCR&AHS/24/0481

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No