Change-of-Direction Repeated Sprints in Adolescent Female Basketball Players
Effects of Changes of Direction on Repeated-Sprint Performance, Perceived Exertion, and Acute Cardiovascular Responses in Adolescent Female Basketball Players: A Randomized Crossover Study
1 other identifier
interventional
20
1 country
1
Brief 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.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at below P25 for not_applicable
Started May 2026
Shorter than P25 for not_applicable
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
Study Start
First participant enrolled
May 2, 2026
CompletedPrimary Completion
Last participant's last visit for primary outcome
May 21, 2026
CompletedStudy Completion
Last participant's last visit for all outcomes
May 21, 2026
CompletedFirst Submitted
Initial submission to the registry
July 22, 2026
CompletedFirst Posted
Study publicly available on registry
July 27, 2026
CompletedJuly 30, 2026
July 1, 2026
19 days
July 22, 2026
July 29, 2026
Conditions
Keywords
Outcome Measures
Primary Outcomes (3)
Average Sprint Time
The mean completion time of the 10 maximal 15-m sprint repetitions, recorded using Witty electronic timing gates and expressed in seconds. The outcome was calculated separately for the linear, one-COD, and two-COD repeated-sprint conditions.
During the repeated-sprint protocol in Sessions 1, 2, and 3 on Study Days 1, 3, and 5, respectively.
Best Sprint Time
The fastest completion time (lowest value) among the 10 maximal 15-m sprint repetitions, recorded using Witty electronic timing gates and expressed in seconds. The outcome was determined separately for the linear, one-COD, and two-COD repeated-sprint conditions.
During the repeated-sprint protocol in Sessions 1, 2, and 3 on Study Days 1, 3, and 5, respectively.
Worst Sprint Time
The slowest completion time (highest value) among the 10 maximal 15-m sprint repetitions, recorded using Witty electronic timing gates and expressed in seconds. The outcome was determined separately for the linear, one-COD, and two-COD repeated-sprint conditions.
During the repeated-sprint protocol in Sessions 1, 2, and 3 on Study Days 1, 3, and 5, respectively.
Secondary Outcomes (7)
Sprint Decrement
Calculated from the repeated-sprint protocol in Sessions 1, 2, and 3 on Study Days 1, 3, and 5, respectively.
Worst-to-Best Decrement
Calculated from the repeated-sprint protocol in Sessions 1, 2, and 3 on Study Days 1, 3, and 5, respectively.
Rating of Perceived Exertion
Immediately after completion of the repeated-sprint protocol in Sessions 1, 2, and 3 on Study Days 1, 3, and 5, respectively.
Heart Rate
Immediately before and immediately after the repeated-sprint protocol in Sessions 1, 2, and 3 on Study Days 1, 3, and 5, respectively.
Peripheral Oxygen Saturation
Immediately before and immediately after the repeated-sprint protocol in Sessions 1, 2, and 3 on Study Days 1, 3, and 5, respectively.
- +2 more secondary outcomes
Study Arms (3)
Sequence 1: Linear-One-COD-Two-COD
EXPERIMENTALParticipants assigned to Sequence 1 completed the linear repeated-sprint condition during the first experimental session, the one-COD condition during the second session, and the two-COD condition during the third session. Consecutive sessions were separated by at least 48 hours.
Sequence 2: One-COD-Two-COD-Linear
EXPERIMENTALParticipants assigned to Sequence 2 completed the one-COD repeated-sprint condition during the first experimental session, the two-COD condition during the second session, and the linear condition during the third session. Consecutive sessions were separated by at least 48 hours.
Sequence 3: Two-COD-Linear-One-COD
EXPERIMENTALParticipants assigned to Sequence 3 completed the two-COD repeated-sprint condition during the first experimental session, the linear condition during the second session, and the one-COD condition during the third session. Consecutive sessions were separated by at least 48 hours.
Interventions
Following a standardized 20-minute dynamic warm-up, participants performed 10 maximal 15-m linear sprints without a change of direction. Each sprint began from a standing position 0.5 m behind the starting line and was recorded using electronic timing gates. A 30-second passive recovery period was provided between repetitions, during which participants remained standing.
Following a standardized 20-minute dynamic warm-up, participants performed 10 maximal 15-m repeated sprints. Each repetition consisted of 7.5 m of forward sprinting followed by one 180-degree change of direction and a 7.5-m return sprint. Each sprint began from a standing position 0.5 m behind the starting line and was recorded using electronic timing gates. A 30-second passive recovery period was provided between repetitions, during which participants remained standing.
Following a standardized 20-minute dynamic warm-up, participants performed 10 maximal 15-m repeated sprints. Each repetition consisted of three consecutive 5-m sections and incorporated two 180-degree changes of direction. Each sprint began from a standing position 0.5 m behind the starting line and was recorded using electronic timing gates. A 30-second passive recovery period was provided between repetitions, during which participants remained standing.
Eligibility Criteria
You may qualify if:
- 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.
You may not qualify if:
- Reporting an injury before testing that could prevent maximal sprint performance.
- Failure to attend all testing sessions or complete all three experimental conditions.
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
Pamukkale University Sports Sciences and Technology Research and Application Center
Denizli, Pamukkale, 20000, Turkey (Türkiye)
Study Officials
- PRINCIPAL INVESTIGATOR
Engin Güneş Atabaş, PhD
Pamukkale Üniversitesi
Study Design
- Study Type
- interventional
- Phase
- not applicable
- Allocation
- RANDOMIZED
- Masking
- NONE
- Purpose
- OTHER
- Intervention Model
- CROSSOVER
- Sponsor Type
- OTHER
- Responsible Party
- PRINCIPAL INVESTIGATOR
- PI Title
- Assistant Professor
Study Record Dates
First Submitted
July 22, 2026
First Posted
July 27, 2026
Study Start
May 2, 2026
Primary Completion
May 21, 2026
Study Completion
May 21, 2026
Last Updated
July 30, 2026
Record last verified: 2026-07
Data Sharing
- IPD Sharing
- Will not share
Individual participant data will not be publicly shared because participant consent did not include public data sharing and the dataset contains information from adolescent participants. De-identified aggregate data may be made available from the corresponding author upon reasonable request and subject to institutional and ethical approval.