Change-of-Direction Repeated Sprints in Adolescent Female Basketball Players
Turkey (Türkiye)20 participantsStarted 2026-05-02
Plain-language summary
The purpose of this randomized crossover study was to compare the acute effects of repeated-sprint protocols incorporating different numbers of 180-degree changes of direction in adolescent female basketball players. Twenty participants completed three exercise conditions in a randomized, counterbalanced order: 10 × 15-m linear sprints, 10 × 15-m sprints incorporating one 180-degree change of direction, and 10 × 15-m sprints incorporating two 180-degree changes of direction. Each sprint was followed by 30 seconds of passive recovery. Sprint performance, perceived exertion, heart rate, peripheral oxygen saturation, and systolic and diastolic blood pressure were assessed. The study examined whether increasing the number of changes of direction affected repeated-sprint performance and acute perceptual and cardiovascular responses.
Who can participate
Age range
16 Years – 18 Years
Sex
FEMALE
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Female basketball players aged 16-18 years.
* Currently competing in the U16 or U18 basketball leagues in Denizli, Türkiye.
* At least two years of structured basketball training experience.
* Regular participation in at least three training sessions and one official match per week.
* No injury or illness that could prevent maximal sprint performance.
Exclusion Criteria:
* Reporting an injury before testing that could prevent maximal sprint performance.
* Failure to attend all testing sessions or complete all three experimental conditions.
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Average Sprint Time
Timeframe: During the repeated-sprint protocol in Sessions 1, 2, and 3 on Study Days 1, 3, and 5, respectively.
2
Best Sprint Time
Timeframe: During the repeated-sprint protocol in Sessions 1, 2, and 3 on Study Days 1, 3, and 5, respectively.
3
Worst Sprint Time
Timeframe: During the repeated-sprint protocol in Sessions 1, 2, and 3 on Study Days 1, 3, and 5, respectively.