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Athletic PerformanceNCT07722143

Acute Effects of Different Warm-Up Protocols in Amateur Basketball Players

A study testing Standard Dynamic Warm-Up, Classical Hold-Relax PNF Stretching and Short-Duration Self-PNF Stretching in people with Athletic Performance and Flexibility, run by Istanbul Medipol University Hospital at 1 site in Turkey (Türkiye).

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

Brief Summary This randomized controlled trial will compare the immediate effects of three warm-up protocols on physical performance in male amateur basketball players. A total of 45 licensed basketball players aged 15 to 25 years will be randomly assigned to one of three groups: standard dynamic warm-up, dynamic… Read more about this study

Who is it for?
Ages 15 to 25 years, men onlyHealthy volunteers can take part
What is being tested?
Standard Dynamic Warm-Up, Classical Hold-Relax PNF Stretching and Short-Duration Self-PNF Stretching
Could I receive a placebo?
No, everyone receives an active treatment
How many people
45 participants
Where
1 siteTurkey (Türkiye)
Study dates
5 Aug 2026to 20 Sep 2026
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 15 to 25 years
  • Men only
  • Healthy volunteers accepted
  • Child, Adult

Who may be able to join

  • Male
  • Aged 15-25 years
  • Licensed amateur basketball player
  • Minimum 2 years of basketball experience
  • Basketball training at least 3 days per week
  • No serious lower-extremity injury within the past 6 months
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  • No lower-extremity surgery within the past 6 months
  • No acute pain or movement limitation
  • No neurological, vestibular, cardiovascular, or respiratory disorder preventing exercise
  • No strenuous exercise or official competition within the past 48 hours No alcohol consumption within the past 24 hours No caffeine, energy drinks, pre-workout products, or ergogenic supplements on the testing day
  • Written informed consent
  • Parental consent and participant assent for participants younger than 18 years

Who cannot join

  • Acute lower-extremity muscle, tendon, ligament, or bone injury
  • Knee, hip, or ankle surgery within the past 6 months
  • History of major ligament, meniscal, or Achilles tendon injury
  • Lumbar disc herniation, sciatica, peripheral nerve injury, or neurological disorder
  • Vestibular disorder or balance impairment
  • Hypertension, serious cardiovascular disease, or exercise contraindication
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  • Physiotherapy or lower-extremity rehabilitation within the past 3 months
  • Regular structured lower-extremity stretching
  • Acute infection, fever, or poor general health on the testing day
  • Inability to complete the intervention or performance tests

Trial locations and contacts

1 site in 1 country.

Turkey (Türkiye)1 site
  • Istanbul Medipol University, South Campus

    Istanbul, 34000

Other trials in Turkey (Türkiye)

About this study

Official title: Comparison of the Acute Effects of Different Warm-Up Protocols on Flexibility, Vertical Jump, Agility, and Sprint Performance in Amateur Basketball Players: A Three-Arm Randomized Controlled Trial

Brief Summary This randomized controlled trial will compare the immediate effects of three warm-up protocols on physical performance in male amateur basketball players. A total of 45 licensed basketball players aged 15 to 25 years will be randomly assigned to one of three groups: standard dynamic warm-up, dynamic warm-up followed by classical hold-relax proprioceptive neuromuscular facilitation (PNF) stretching, or dynamic warm-up followed by short-duration self-administered PNF stretching.

The main outcome will be the change in countermovement jump height. Additional outcomes will include flexibility, knee range of motion, squat jump height, 20-meter sprint time, agility, dynamic balance, and perceived exertion. Measurements will be performed before the assigned warm-up protocol, immediately after the protocol, and 15 minutes after the protocol.

The study aims to determine whether short-duration self-PNF stretching can improve flexibility while preserving performance more effectively than classical PNF stretching. Each participant will complete the assigned protocol and all assessments during a single study session.

Read the detailed description

This study is designed as a single-center, three-arm, parallel-group, assessor-blinded randomized controlled trial investigating the acute effects of different warm-up and proprioceptive neuromuscular facilitation (PNF) stretching protocols in male amateur basketball players.

Forty-five licensed amateur basketball players aged 15 to 25 years will be enrolled and randomly allocated in a 1:1:1 ratio to one of the following groups:

Standard dynamic warm-up Standard dynamic warm-up followed by classical hold-relax PNF stretching Standard dynamic warm-up followed by short-duration self-administered PNF stretching Randomization will be performed using a computer-generated block randomization sequence prepared by an independent researcher who will not participate in outcome assessment. Group assignments will be concealed in sequentially numbered, opaque, sealed envelopes. The investigator conducting the performance assessments will be blinded to group allocation.

All participants will first perform a standardized dynamic warm-up lasting approximately 10 minutes. The program will include light jogging, high knees, butt kicks, walking lunges, side shuffles, carioca running, multidirectional leg swings, and short progressive acceleration runs.

Participants assigned to the classical PNF group will subsequently receive therapist-administered hold-relax PNF stretching for the hamstrings, quadriceps, gastrocnemius, and hip flexor muscles. Each muscle group will undergo a 6-second submaximal isometric contraction followed by a 20-second passive stretch, repeated three times bilaterally.

Participants assigned to the short-duration self-PNF group will perform supervised self-administered PNF exercises targeting the same muscle groups. Each cycle will include brief agonist or antagonist muscle contractions combined with a short stretching phase. Four repetitions will be completed for each muscle group.

Outcome assessments will be conducted at three time points:

Before the assigned intervention Within the first two minutes after completion of the intervention Fifteen minutes after completion of the intervention The primary outcome will be countermovement jump height, which will be used as an indicator of lower-extremity explosive performance. Secondary outcomes will include squat jump height, 20-meter sprint time, T-test agility performance, Illinois agility performance, Y Balance Test results, sit-and-reach flexibility, active knee flexion range of motion, and perceived exertion.

All interventions and assessments will be completed during a single session lasting approximately 60 to 75 minutes. Testing will be conducted under standardized environmental conditions using the same equipment and assessment order. Participants will be instructed to avoid strenuous exercise before testing and to refrain from alcohol, energy drinks, pre-workout products, and other ergogenic supplements that could influence performance.

The study will examine whether short-duration self-administered PNF stretching can provide flexibility benefits without adversely affecting jump, sprint, agility, and balance performance. The findings may help sports physiotherapists, trainers, and coaches select evidence-based warm-up strategies for amateur basketball players.

Being tested
Standard Dynamic Warm-Up, Classical Hold-Relax PNF Stretching, Short-Duration Self-PNF Stretching
Keywords
Amateur Basketball Players, Dynamic Warm-Up, Proprioceptive Neuromuscular Facilitation, Sprint Performance, Self-PNF

What participants receive

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

  • Standard Dynamic Warm-UpBehavioural

    Participants will perform a standardized dynamic warm-up lasting approximately 10 minutes. The protocol will include 3 minutes of light jogging, high knees, butt kicks, walking lunges, side shuffles, carioca running, sagittal and frontal plane leg swings, and three 10-meter progressive acceleration runs. Each dynamic exercise will be performed for approximately 20 to 30 seconds or over two 20-meter repetitions, as appropriate.

  • Classical Hold-Relax PNF StretchingBehavioural

    After completing the standardized dynamic warm-up, participants will receive therapist-administered hold-relax PNF stretching for the hamstrings, quadriceps, gastrocnemius, and hip flexors. Each muscle will be moved to the maximum pain-free stretch position. The participant will then perform a 6-second isometric contraction at approximately 60% to 70% of maximal voluntary effort, followed by relaxation and a 20-second therapist-assisted passive stretch at the new range limit. Three repetitions will be performed bilaterally for each muscle group, with approximately 30 seconds of rest between muscle groups. The PNF component will last

  • Short-Duration Self-PNF StretchingBehavioural

    After completing the standardized dynamic warm-up, participants will perform a supervised short-duration self-PNF protocol targeting the hamstrings, quadriceps, gastrocnemius, and hip flexors. Each repetition will include a 5-second contraction of the opposing muscle group, a 5-second stretch of the target muscle, and a 5-second contraction of the target muscle. Four repetitions will be completed for each muscle group bilaterally, with approximately 20 seconds of rest between muscle groups. The self-PNF component will last approximately 7 to 8 minutes.

Study groups in NCT07722143
Study groupRoleWhat they receive
Standard Dynamic Warm-UpActive comparatorArm Description: Participants will complete a standardized dynamic warm-up lasting approximately 10 minutes. The program will include 3 minutes of light jogging, high knees, butt kicks, walking lunges, side shuffles, carioca running, leg swings in the sagittal and frontal planes, and three 10-meter progressive acceleration runs. No PNF stretching will be performed.
Receives: Behavioral: Standard Dynamic Warm-Up
Dynamic Warm-Up Plus Classical PNFActive comparatorParticipants will complete the standardized 10-minute dynamic warm-up followed by therapist-administered classical hold-relax proprioceptive neuromuscular facilitation stretching. The PNF protocol will be applied bilaterally to the hamstrings, quadriceps, gastrocnemius, and hip flexors.
Receives: Behavioral: Standard Dynamic Warm-Up; Behavioral: Classical Hold-Relax PNF Stretching
Dynamic Warm-Up Plus Short-Duration Self-PNFExperimentalParticipants will complete the standardized 10-minute dynamic warm-up followed by a supervised short-duration, self-administered proprioceptive neuromuscular facilitation stretching protocol. The protocol will target the hamstrings, quadriceps, gastrocnemius, and hip flexors bilaterally.
Receives: Behavioral: Standard Dynamic Warm-Up; Behavioral: Short-Duration Self-PNF Stretching

What is being measured

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

  1. Change in Countermovement Jump Height

    Lower-extremity explosive performance will be assessed using the countermovement jump test. Participants will perform three maximal vertical jumps with their hands placed on their hips. Jump height will be recorded in centimeters using a standardized jump measurement system. The highest value from the three attempts will be used. Higher values indicate better jump performance. Change from baseline will be compared among the three intervention groups.

    Measured: Baseline, immediately after the intervention (within 2 minutes), and 15 minutes after the intervention

Secondary outcomes (8)
  1. Change in Squat Jump Height

    Explosive lower-extremity performance without a countermovement will be assessed using the squat jump test. Jump height will be recorded in centimeters. Participants will complete three attempts, and the highest value will be used. Higher values indicate better performance.

    Measured: Baseline, immediately after the intervention (within 2 minutes), and 15 minutes after the intervention

  2. Change in 20-Meter Sprint Time

    Linear sprint performance will be assessed over a distance of 20 meters using an electronic timing system. Participants will complete three maximal sprint attempts with approximately 3 minutes of rest between attempts. The shortest completion time will be recorded in seconds. Lower values indicate better sprint performance.

    Measured: Baseline, immediately after the intervention (within 2 minutes), and 15 minutes after the intervention

  3. Change in T-Test Agility Time

    Multidirectional agility and change-of-direction performance will be assessed using the standard T-test agility protocol. Participants will complete three attempts, and the shortest completion time will be recorded in seconds. Lower values indicate better agility performance.

    Measured: Baseline, immediately after the intervention (within 2 minutes), and 15 minutes after the intervention

  4. Change in Illinois Agility Test Time

    Agility and rapid change-of-direction performance will be assessed using the Illinois Agility Test. Completion time will be recorded in seconds. The shortest valid completion time will be used for analysis. Lower values indicate better agility performance.

    Measured: Baseline, immediately after the intervention (within 2 minutes), and 15 minutes after the intervention

  5. Change in Y Balance Test Composite Score

    Dynamic balance will be assessed using the Y Balance Test in the anterior, posteromedial, and posterolateral directions. Reach distances will be normalized to lower-extremity length, and a composite score will be calculated as a percentage. Higher scores indicate better dynamic balance performance.

    Measured: Baseline, immediately after the intervention (within 2 minutes), and 15 minutes after the intervention

  6. Change in Sit-and-Reach Distance

    Posterior-chain flexibility will be assessed using the sit-and-reach test. Participants will complete three attempts, and the greatest reaching distance will be recorded in centimeters. Higher values indicate greater flexibility.

    Measured: Baseline, immediately after the intervention (within 2 minutes), and 15 minutes after the intervention

  7. Change in Active Knee Flexion Range of Motion

    Active knee flexion range of motion will be measured bilaterally in the prone position using a universal goniometer. Three measurements will be obtained for each lower extremity, and the highest value will be recorded in degrees. Higher values indicate greater knee flexion range of motion and quadriceps flexibility.

    Measured: Baseline, immediately after the intervention (within 2 minutes), and 15 minutes after the intervention

  8. Change in Rating of Perceived Exertion

    Perceived physical exertion will be assessed using the Modified Borg Rating of Perceived Exertion Scale ranging from 0 to 10. A score of 0 indicates no exertion, whereas a score of 10 indicates maximal exertion. Higher scores indicate greater perceived exertion.

    Measured: Baseline, immediately after the intervention (within 2 minutes), and 15 minutes after the intervention

Timeline

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

  1. First posted23 Jul 2026
  2. Study start5 Aug 2026
  3. Primary completion10 Sep 2026
  4. Study completion20 Sep 2026

Resources

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
Basic science
Allocation
Randomised
Intervention model
Parallel groups
Model description
Participants will be randomly assigned in a 1:1:1 ratio to one of three parallel intervention arms: standard dynamic warm-up, dynamic warm-up followed by classical hold-relax proprioceptive neuromuscular facilitation stretching, or dynamic warm-up followed by short-duration self-administered proprioceptive neuromuscular facilitation stretching. Each participant will receive only the intervention assigned to their group during a single study session. Outcomes will be assessed before the intervention, immediately after the intervention, and 15 minutes after the intervention.
Masking
Single blind
Who is masked
Outcomes assessor
Enrolment
45 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07722143
Sponsor's protocol ID
IMU-BB-PNF-2026-02
Status last verified
Jul 2026
First submitted
20 Jul 2026
Last updated
28 Oct 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A study testing Standard Dynamic Warm-Up, Classical Hold-Relax PNF Stretching and Short-Duration Self-PNF Stretching in people with Athletic Performance and Flexibility, run by Istanbul Medipol University Hospital at 1 site in Turkey (Türkiye).

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 12 inclusion and 10 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 28 Oct 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 Turkey (Türkiye). 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?

Change in Countermovement Jump Height (time frame: Baseline, immediately after the intervention (within 2 minutes), and 15 minutes after the intervention). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
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 28 Oct 2026.

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