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NCT Number: NCT07274566

The Effects of an 8-Week Exer-Genie-Assisted Speed and ABC Drill Training Program on Speed, Hamstring Strength, and Vertical Jump Performance in Female Football Players

This study aims to examine the effects of an eight-week Exer-Genie®-assisted speed and agility-balance-coordination (ABC drill) training program on sprint performance, hamstring muscle strength, and vertical jump ability in young female football players. A total of 37 licensed female football players competing in the Turkish Women's Second League participated in the study. Participants were randomly assigned to an experimental group (n = 20) or a control group (n = 17). The study evaluates whether this integrated training approach enhances acceleration, force production, and neuromuscular control compared to regular team training alone.

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Key information

Conditions

Athletic Performance Hamstring Muscles Muscle Strength

Age range

11 year–17 year

Sex eligibility

Female

Study type

Interventional

Phase

Not applicable

Primary location

Istanbul Gedik University, Faculty of Sport Sciences, Indoor Sports Hall

Istanbul, Turkey (Türkiye)

About this study

Study Design and Participants The study involves 37 female football players from the Pendik Güven Women's Football Team (mean age 14.4 ± 1.4 years), licensed by the Turkish Football Federation. Participants were randomly assigned to an experimental group (n = 20) or a control group (n = 17).

Intervention Protocol The experimental group completed an Exer-Genie®-assisted sprint and ABC drill training program twice per week for eight weeks (total of 16 sessions). Each session was performed after a standardized warm-up and consisted of six 30-m sprint runs and technical drills. The sprints were performed with resistance applied using the 60-m Exer-Genie® device, with resistance intensity set at 10% of each athlete's body weight. The control group continued with their regular team training only.Outcome Measures 1. Sprint Performance: Assessed via 0-10 m, 10-30 m, and 30 m sprint times using the SmartSpeed electronic timing gate system. 2. Hamstring Strength: Assessed using the NordBord Hamstring Testing System. Specifically, the ISO Prone (0°) protocol was used to measure isometric hamstring strength and impulse values. 3. Vertical Jump: Assessed via the Countermovement Jump (CMJ) test using the ForceDecks system to evaluate lower-limb explosive performance.Statistical Analysis Data were analyzed using repeated-measures ANOVA to evaluate time, group, and interaction effects, with a significance level set at p < 0.05.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Female gender.

Licensed football players competing in the Turkish Women's Second League.

Regularly engaged in football training for at least two years.

Aged between 11 and 17 years.

Exclusion criteria

History of recent musculoskeletal injury.

Any chronic health condition that could affect athletic performance.

Irregular attendance to the training sessions during the study period.

Treatment and study plan

Exer-Genie® Training Protocol

Other

The protocol consisted of six 30-m sprint runs performed with resistance applied using the 60-m Exer-Genie® device. Resistance was set at 10% of the athlete's body weight. The training was conducted twice a week for 8 weeks.

Primary outcomes

  1. Sprint Performance (30m Sprint Test)

    Time frame: Baseline (Pre-test) and immediately after the 8-week intervention (Post-test)

    Sprint performance was evaluated using the SmartSpeed electronic timing gate system. Time was recorded in seconds for 0-10 m (acceleration), 10-30 m (transition), and full 30 m distances. Lower time indicates better performance.

  2. Hamstring Muscle Strength (NordBord ISO Prone)

    Time frame: Baseline (Pre-test) and immediately after the 8-week intervention (Post-test)

    Isometric hamstring strength and impulse (force-time curve area) were assessed using the NordBord Hamstring Testing System with the ISO Prone protocol (0 degrees knee extension). Measured in Newtons (N) and N.s.

  3. Vertical Jump Height (Countermovement Jump)

    Time frame: Baseline (Pre-test) and immediately after the 8-week intervention (Post-test)

    Lower-limb explosive power was assessed via the Countermovement Jump (CMJ) test using ForceDecks force platforms. Jump height was recorded in centimeters (cm).

Sponsors and collaborators

Lead sponsor

Istanbul Rumeli University

Other

Registry information

Important dates

Study start
2025
Primary completion
2025
Study completion
2025
First posted
Dec 10, 2025
Registry last updated
Dec 10, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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