AthletesNCT07664475
Effects of Drop Jump During Warm-up on Athletic Performance and Ankle Stability in Young Basketball Players
A study testing Drop Jump in people with Athletes and Performance, run by University of Palermo at 1 site in Italy.
Trial summary
Youth basketball is a sport that requires high levels of power and speed. Regardless of the competitive level, young athletes undergo rigorous training to enhance their coordination, neuromuscular reactivity, jump height, and sprint speed. Read more about this study
- Who is it for?
- Ages 13 to 14 years
- Conditions the study is for
- Athletes, Performance
- What is being tested?
- Drop Jump
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 22 participants
- Where
- 1 siteItaly
- Study dates
- 2 Mar 2026to 27 Apr 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 13 to 14 years
- All sexes
- No healthy volunteers
- Child
Who may be able to join
- Active participation in competitive training programs (at least 7 hours per week), at least one year of experience in competitions organized by the Italian Basketball Federation, and no recent injuries.
Who cannot join
- Presence of current or not fully recovered injuries to the ankle or foot, and irregular participation in training sessions within the three weeks preceding the study.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Effects of Drop Jump During Warm-up on Jumping Ability, Sprint Performance and Ankle Landing Stability: A Randomized Controlled Study
Youth basketball is a sport that requires high levels of power and speed. Regardless of the competitive level, young athletes undergo rigorous training to enhance their coordination, neuromuscular reactivity, jump height, and sprint speed. Each youth basketball player voluntarily underwent testing at the same sports facility after reading and signing the informed consent document (provided by parents or legal guardians). During the first session, general anthropometric information was collected on all participants (age, weight, and height), followed by an assessment of athletic performance and stability parameters. For the vertical jump performance parameters, the Counter Movement Jump test (CMJ) was used through an optical detecting system. A pressure platform was used to measure ankle stability during the landing phase using a single-leg jump protocol, while acceleration performance was evaluated via a 10-meter sprint test. Subsequently, participants were randomly divided into two groups: an experimental group (EG) and a control group (CG). The EG performed a Drop Jump protocol at the end of warm-up, consisting of three sets of 5 repetitions, with a 3-minute rest period between sets, for a total duration of 8 weeks. At the end of the eight weeks, all measurements regarding the evaluated outcomes (vertical jump height, CMJ, landing ankle stability, and 10-meter sprint) were repeated for both groups.
- Conditions
- Athletes, Performance
- Being tested
- Drop Jump
- Keywords
- Basketball Players, Warm-Up, Ankle Stability
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Drop JumpOther
Three sets, each consisting of 5 repetitions with 3-minute breaks between sets, to be performed twice a week. During each DJ trial, the participants were asked to perform a maximum vertical jump with their hands at their sides as soon as possible after touching the ground. They were also given 15 seconds to climb back onto the drop and perform another trial.
| Study group | Role | What they receive |
|---|---|---|
| Drop Jump (DJ) | Experimental | The participants performed a multi-phase warm-up and then completed 3 sets of 5 repetitions of drop jumps with a 3-minute rest period, twice a week for a total of 8 weeks. Receives: Other: Drop Jump |
| Control Group (CG) | No intervention | The participants followed the same full warm-up protocol as the experimental group, with the exception of the drop jump |
What is being measured
The primary outcome is the main question the study is designed to answer.
Counter Movement Jump (CMJ)
Initially, the athlete stands upright on a flat surface or force platform, feet shoulder-width apart, hands on hips (to eliminate arm swing). Without a pause, the athlete performs a quick downward movement (countermovement) by bending the knees and hips, then immediately jumps vertically as high as possible. The athlete lands in an upright position on the same spot, trying to absorb the impact with knees slightly bent. Jump height and flight time is recorded using an optical system, Optojump™ system(Microgate, Bolzano, Italy) connected to a personal computer with dedicated software(OptojumpTM Next software). The system consists of two optical bars, a receiver and a transmitter, positioned 1m apart. The bars identify ground contact time(with a precision of 1ms) and then convert non-contact time into cm. Based on recommendations on optimal jump height (20 to 60cm).
Measured: At the beginning of enrollment ( Baseline, T0) and the end of the 8-week treatment (T1)
Ankle Landing Stability
Ankle stability was assessed using a functional monopodalic protocol, which involved four jumps on one foot: two per leg, both frontally and laterally. These jumps were performed by stepping over an adjustable obstacle set at 70% of the maximum height reached on a pressure platform (SensorMedica freeMed 40×40, Guidonia Montecelio, Italy). The platform has an active sensory surface of 40×40 cm with a thickness of only 8 mm and a low weight of approximately 4 kg. Inside, there are resistive sensors coated in 24K gold on conductive rubber, with a density of approximately 10,000 sensors/m².The acquisition frequency is high, up to 400 Hz, allowing for detailed dynamic analysis, and the sensors have a life cycle of over 1,000,000 cycles of use
Measured: At the beginning of enrollment ( Baseline, T0) and the end of the 8-week treatment (T1)
Sprint Performance
Two cones were placed 10 meters apart. The participants were then asked to perform 3 sprints, with 3-minute recovery periods in between. A manual stopwatch was used, which was started exactly when the operator gave the start signal and stopped exactly as the subject passed the second cone.
Measured: At the beginning of enrollment ( Baseline, T0) and the end of the 8-week treatment (T1)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted24 Jun 2026
- Study start2 Mar 2026
- Primary completion27 Apr 2026
- Study completion27 Apr 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for AthletesStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
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
- Other
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Model description
- Experimental Group (EG) and Control Group (CG)
- Masking
- Single blind
- Who is masked
- Outcomes assessor
- Enrolment
- 22 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Palermo
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Giacomo Belmonte, University of Palermo
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07664475
- Sponsor's protocol ID
- 62141-2025-3
- Status last verified
- Feb 2026
- First submitted
- 17 Jun 2026
- Last updated
- 24 Jun 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 24 Jun 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effects of Drop Jump During Warm-up on Jumping Ability, Sprint Performance and Ankle Landing Stability: A Randomized Controlled Study
- ClinicalTrials.gov ID
- NCT07664475
- Acronym / sponsor ID
- 62141-2025-3
- Conditions
- Athletes, Performance
- Keywords
- Basketball Players, Warm-Up, Ankle Stability
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 22 participants (actual)
- Lead sponsor
- University of PalermoUniversity, hospital or other
- Study start
- 2 Mar 2026 (actual)
- Primary completion
- 27 Apr 2026 (actual)
- Study completion
- 27 Apr 2026 (actual)
- First posted
- 24 Jun 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Youth basketball is a sport that requires high levels of power and speed. Regardless of the competitive level, young athletes undergo rigorous training to enhance their coordination, neuromuscular reactivity, jump height, and sprint speed. Each youth basketball player voluntarily underwent testing at the same sports facility after reading and signing the informed consent document (provided by parents or legal guardians). During the first session, general anthropometric information was collected on all participants (age, weight, and height), followed by an assessment of athletic performance and stability parameters. For the vertical jump performance parameters, the Counter Movement Jump test (CMJ) was used through an optical detecting system. A pressure platform was used to measure ankle stability during the landing phase using a single-leg jump protocol, while acceleration performance was evaluated via a 10-meter sprint test. Subsequently, participants were randomly divided into two groups: an experimental group (EG) and a control group (CG). The EG performed a Drop Jump protocol at the end of warm-up, consisting of three sets of 5 repetitions, with a 3-minute rest period between sets, for a total duration of 8 weeks. At the end of the eight weeks, all measurements regarding the evaluated outcomes (vertical jump height, CMJ, landing ankle stability, and 10-meter sprint) were repeated for both groups.
Study design
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (outcomes assessor)
- Number of arms
- 2
- Model description
- Experimental Group (EG) and Control Group (CG)
| Arm | Type | Receives |
|---|---|---|
| Drop Jump (DJ) | Experimental | Other: Drop JumpThe participants performed a multi-phase warm-up and then completed 3 sets of 5 repetitions of drop jumps with a 3-minute rest period, twice a week for a total of 8 weeks. |
| Control Group (CG) | No intervention | –The participants followed the same full warm-up protocol as the experimental group, with the exception of the drop jump |
Who may qualify
- Ages
- 13 to 14 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child
Key inclusion criteria (1 listed)
- Active participation in competitive training programs (at least 7 hours per week), at least one year of experience in competitions organized by the Italian Basketball Federation, and no recent injuries.
Key exclusion criteria (1 listed)
- Presence of current or not fully recovered injuries to the ankle or foot, and irregular participation in training sessions within the three weeks preceding the study.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Drop JumpThree sets, each consisting of 5 repetitions with 3-minute breaks between sets, to be performed twice a week. During each DJ trial, the participants were asked to perform a maximum vertical jump with their hands at their sides as soon as possible after touching the ground. They were also given 15 seconds to climb back onto the drop and perform another trial. | Other | Drop Jump (DJ) |
Primary outcome
Counter Movement Jump (CMJ)
Time frame: At the beginning of enrollment ( Baseline, T0) and the end of the 8-week treatment (T1)
Initially, the athlete stands upright on a flat surface or force platform, feet shoulder-width apart, hands on hips (to eliminate arm swing). Without a pause, the athlete performs a quick downward movement (countermovement) by bending the knees and hips, then immediately jumps vertically as high as possible. The athlete lands in an upright position on the same spot, trying to absorb the impact with knees slightly bent. Jump height and flight time is recorded using an optical system, Optojump™ system(Microgate, Bolzano, Italy) connected to a personal computer with dedicated software(OptojumpTM Next software). The system consists of two optical bars, a receiver and a transmitter, positioned 1m apart. The bars identify ground contact time(with a precision of 1ms) and then convert non-contact time into cm. Based on recommendations on optimal jump height (20 to 60cm).
Ankle Landing Stability
Time frame: At the beginning of enrollment ( Baseline, T0) and the end of the 8-week treatment (T1)
Ankle stability was assessed using a functional monopodalic protocol, which involved four jumps on one foot: two per leg, both frontally and laterally. These jumps were performed by stepping over an adjustable obstacle set at 70% of the maximum height reached on a pressure platform (SensorMedica freeMed 40×40, Guidonia Montecelio, Italy). The platform has an active sensory surface of 40×40 cm with a thickness of only 8 mm and a low weight of approximately 4 kg. Inside, there are resistive sensors coated in 24K gold on conductive rubber, with a density of approximately 10,000 sensors/m².The acquisition frequency is high, up to 400 Hz, allowing for detailed dynamic analysis, and the sensors have a life cycle of over 1,000,000 cycles of use
Sprint Performance
Time frame: At the beginning of enrollment ( Baseline, T0) and the end of the 8-week treatment (T1)
Two cones were placed 10 meters apart. The participants were then asked to perform 3 sprints, with 3-minute recovery periods in between. A manual stopwatch was used, which was started exactly when the operator gave the start signal and stopped exactly as the subject passed the second cone.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 24 Jun 2026.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Drop Jump in people with Athletes and Performance, run by University of Palermo at 1 site in Italy.
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 1 inclusion and 1 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 24 Jun 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 Italy. 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?
Counter Movement Jump (CMJ) (time frame: At the beginning of enrollment ( Baseline, T0) and the end of the 8-week treatment (T1)). The study lists 3 primary outcomes in all. 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 24 Jun 2026.