Athletic PerformanceNCT07170930
The Effect of a Training Programme in the Variation of Fitness Parameters, Physiological, Hematological and Biochemical Indicators of Soccer Players During the Preseason Period
An observational study of Athletic Performance and Soccer, run by Emmanouil D. Zacharakis at 1 site in Greece.
Trial summary
The goal of this study is to investigate the effects of varying friendly match-play exposure during the late pre-season on physiological, biochemical, and performance adaptations in soccer players. Read more about this study
- Who is it for?
- Ages 18 to 35 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Athletic Performance, Soccer, Muscle Damage
- What is being tested?
- Friendly Match-Play Exposure: extended vs. limited
- How many people
- 24 participants
- Where
- 1 siteGreece
- Study dates
- 1 Jul 2025to 15 Sep 2025
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
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 18 to 35 years
- Men only
- Healthy volunteers accepted
- Adult
Study population: All participants are highly active soccer players (i.e., >1000 MET-min·week-¹) and compete at national-level standards.
Who may be able to join
- Male participants
- Aged 18 years or older
- Non-smokers
- Injury-free for the past 6 months
- Medication-free for the past 6 months
- Abstinent from alcohol
- Living at an altitude below 1500 meters
- Committed exclusively to soccer (no participation in other sports)
Who cannot join
- History of serious injuries (e.g., fractures, ligament tears) within the past 6 months
- Chronic medical conditions such as cardiovascular disease, diabetes, or respiratory disorders
- Current use of performance-enhancing drugs or supplements
- Participation in non-soccer-related sports or activities during the study period
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Greece1 site
School of Physical Education and Sports Science, National and Kapodistrian University of Athens
Athens, Daphni, 17237
About this study
The goal of this study is to investigate the effects of varying friendly match-play exposure during the late pre-season on physiological, biochemical, and performance adaptations in soccer players. It is hypothesized that (i) significant changes will occur across the pre-season in both the extended- and limited-play groups when analysed independently; (ii) distinct group-specific adaptations will emerge by the end of the preparatory period; and (iii) match-play exposure, when analysed across all participants, will be significantly correlated with physiological and performance outcomes at pre-season completion. Players from a randomly selected team will be assessed at three time points: pre-season start, mid-pre-season (MPS), and pre-competition phase (PC). Assessments will include anthropometry, physical performance, and markers of muscle damage, inflammation, hormonal status, and haematology. Based on the total match-play time of 8 friendly games during the late pre-season, players will be retrospectively categorised into extended-play (EP) and limited-play (LP) cohorts.time of 8 friendly games during the late pre-season, players will be retrospectively categorised into extended-play (EP) and limited-play (LP) cohorts.
- Conditions
- Athletic Performance, Soccer, Muscle Damage, Inflammation, Exercise Test, Pre-season Training
- Being tested
- Friendly Match-Play Exposure: extended vs. limited
- Keywords
- Pre-season training, Match-play exposure, Physiological adaptation, Biochemical markers, Recovery strategies, Training intensity, Physiological stress, Football, Aerobic-anaerobic, Effect, Athletic, Performance adaptation
- Medical subject headings
- Inflammation
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Friendly Match-Play Exposure: extended vs. limitedOther
This research explores the multidimensional physiological and biochemical responses to differing volumes of friendly match-play (i.e., extended vs. limited) during the late pre-season phase in soccer players.
| Study group | Role | What they receive |
|---|---|---|
| Extended-Play | Participants with higher cumulative friendly match-play exposure during the late pre-season phase. Receives: Other: Friendly Match-Play Exposure: extended vs. limited | |
| Limited-Play | Participants with lower cumulative friendly match-play exposure during the late pre-season phase. Receives: Other: Friendly Match-Play Exposure: extended vs. limited |
What is being measured
The primary outcome is the main question the study is designed to answer.
Body Mass
Description: Body mass measured at standard anatomical sites using a calibrated scale to track longitudinal changes over the pre-season.
Unit of Measure: kg
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Body Fat
Description: Body fat percentage measured using skinfold calipers at standard sites to monitor longitudinal changes.
Unit of Measure: %
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Rate of Perceived Exertion (RPE)
Description: Participants rate exertion during standardized training sessions using the Borg Scale (6 = no exertion, 20 = maximal exertion).
Unit of Measure: Borg 6-20 scale
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Glucose
Description: Fasting blood glucose measured to track metabolic changes over pre-season.
Unit of Measure: mg/dL
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Cholesterol
Description: Total serum cholesterol measured to assess lipid profile adaptations.
Unit of Measure: mg/dL
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Triglycerides
Description: Serum triglycerides measured to monitor metabolic response to training.
Unit of Measure: mg/dL
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
SGOT (AST)
Description: Serum glutamic-oxaloacetic transaminase measured to assess liver/muscle stress.
Unit of Measure: U/L
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
SGPT (ALT)
Description: Serum glutamic-pyruvic transaminase measured to monitor liver/muscle stress.
Unit of Measure: U/L
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Creatine Phosphokinase (CPK)
Description: CPK measured to detect skeletal muscle damage.
Unit of Measure: U/L
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Myoglobin
Description: Myoglobin measured as a marker of muscle damage.
Unit of Measure: ng/mL
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Iron
Description: Serum iron measured to assess iron status.
Unit of Measure: µg/dL
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Ferritin
Description: Serum ferritin measured to monitor iron storage.
Unit of Measure: ng/mL
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
C-Reactive Protein (CRP)
Description: CRP measured as a marker of systemic inflammation.
Unit of Measure: mg/L
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
High-sensitivity CRP (hs-CRP)
Description: hs-CRP measured to detect low-grade inflammation.
Unit of Measure: mg/L
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Interleukin-6 (IL-6)
Description: IL-6 measured from serum to assess inflammatory response.
Unit of Measure: pg/mL
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Tumor Necrosis Factor-alpha (TNF-α)
Description: TNF-α measured as a marker of systemic inflammation.
Unit of Measure: pg/mL
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Testosterone
Description: Serum testosterone measured to assess hormonal adaptations.
Unit of Measure: ng/dL
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Cortisol
Description: Serum cortisol measured to monitor stress response.
Unit of Measure: µg/dL
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Testosterone-Cortisol Ratio
Description: Calculated ratio to estimate anabolic-catabolic balance.
Unit of Measure: Ratio
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Red Blood Cells (RBC)
Description: RBC count measured from blood to assess oxygen transport capacity.
Unit of Measure: million cells/µL
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Hemoglobin
Description: Hemoglobin measured to evaluate oxygen-carrying capacity.
Unit of Measure: g/dL
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Hematocrit
Description: Hematocrit measured as percentage of RBC in blood.
Unit of Measure: %
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
White Blood Cells (WBC)
Description: WBC count measured to monitor immune function.
Unit of Measure: cells/µL
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Platelets
Description: Platelet count measured to assess hematological health.
Unit of Measure: cells/µL
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Countermovement Jump Height
Description: Jump height measured (cm) to assess lower-limb explosive power.
Unit of Measure: cm
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Knee Extensor Power, Dominant Leg
Description: Measured using isokinetic dynamometer.
Unit of Measure: Watts
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Knee Extensor Power, Non-Dominant Leg
Description: Measured using isokinetic dynamometer.
Unit of Measure: Watts
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Knee Flexor Power, Dominant Leg
Description: Measured using isokinetic dynamometer.
Unit of Measure: Watts
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Knee Flexor Power, Non-Dominant Leg
Description: Measured using isokinetic dynamometer.
Unit of Measure: Watts
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
10-m Sprint Time
Description: Sprint time measured using photocell gates; lower times indicate better performance.
Unit of Measure: seconds
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
T-Test Agility
Description: Participants perform T-test agility course; lower times indicate better agility.
Unit of Measure: seconds
Measured: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted12 Sep 2025
- Study start1 Jul 2025
- Primary completion15 Sep 2025 (estimated)
- Study completion15 Sep 2025 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Athletic PerformanceStudies 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
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 24 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Emmanouil D. Zacharakis
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor-investigator, Emmanouil D. Zacharakis, National and Kapodistrian University of Athens
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07170930
- Sponsor's protocol ID
- ERC-002/2023
- Status last verified
- Jun 2025
- First submitted
- 1 Jul 2025
- Last updated
- 19 Sep 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes
Study at a glance
From the registry record, last updated by the sponsor on 19 Sep 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Effect of a Training Programme in the Variation of Fitness Parameters, Physiological, Hematological and Biochemical Indicators of Soccer Players During the Preseason Period
- ClinicalTrials.gov ID
- NCT07170930
- Acronym / sponsor ID
- ERC-002/2023
- Conditions
- Athletic Performance, Soccer, Muscle Damage, Inflammation, Exercise Test, Pre-season Training
- Keywords
- Pre-season training, Match-play exposure, Physiological adaptation, Biochemical markers, Recovery strategies, Training intensity, Physiological stress, Football
- Study type
- Observational
- Recruitment status
- Enrolling by invitation
- Enrolment
- 24 participants (estimated)
- Lead sponsor
- Emmanouil D. ZacharakisUniversity, hospital or other
- Study start
- 1 Jul 2025 (actual)
- Primary completion
- 15 Sep 2025 (estimated)
- Study completion
- 15 Sep 2025 (estimated)
- First posted
- 12 Sep 2025 (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.
The goal of this study is to investigate the effects of varying friendly match-play exposure during the late pre-season on physiological, biochemical, and performance adaptations in soccer players. It is hypothesized that (i) significant changes will occur across the pre-season in both the extended- and limited-play groups when analysed independently; (ii) distinct group-specific adaptations will emerge by the end of the preparatory period; and (iii) match-play exposure, when analysed across all participants, will be significantly correlated with physiological and performance outcomes at pre-season completion. Players from a randomly selected team will be assessed at three time points: pre-season start, mid-pre-season (MPS), and pre-competition phase (PC). Assessments will include anthropometry, physical performance, and markers of muscle damage, inflammation, hormonal status, and haematology. Based on the total match-play time of 8 friendly games during the late pre-season, players will be retrospectively categorised into extended-play (EP) and limited-play (LP) cohorts.time of 8 friendly games during the late pre-season, players will be retrospectively categorised into extended-play (EP) and limited-play (LP) cohorts.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Extended-Play | – | Other: Friendly Match-Play Exposure: extended vs. limitedParticipants with higher cumulative friendly match-play exposure during the late pre-season phase. |
| Limited-Play | – | Other: Friendly Match-Play Exposure: extended vs. limitedParticipants with lower cumulative friendly match-play exposure during the late pre-season phase. |
Who may qualify
- Ages
- 18 to 35 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Adult
- Study population
- All participants are highly active soccer players (i.e., >1000 MET-min·week-¹) and compete at national-level standards.
Key inclusion criteria (8 listed)
- Male participants
- Aged 18 years or older
- Non-smokers
- Injury-free for the past 6 months
- Medication-free for the past 6 months
Key exclusion criteria (4 listed)
- History of serious injuries (e.g., fractures, ligament tears) within the past 6 months
- Chronic medical conditions such as cardiovascular disease, diabetes, or respiratory disorders
- Current use of performance-enhancing drugs or supplements
- Participation in non-soccer-related sports or activities during the study period
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 |
|---|---|---|
| Friendly Match-Play Exposure: extended vs. limitedThis research explores the multidimensional physiological and biochemical responses to differing volumes of friendly match-play (i.e., extended vs. limited) during the late pre-season phase in soccer players. | Other | Extended-Play, Limited-Play |
Primary outcome
Body Mass
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Body mass measured at standard anatomical sites using a calibrated scale to track longitudinal changes over the pre-season. Unit of Measure: kg
Body Fat
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Body fat percentage measured using skinfold calipers at standard sites to monitor longitudinal changes. Unit of Measure: %
Rate of Perceived Exertion (RPE)
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Participants rate exertion during standardized training sessions using the Borg Scale (6 = no exertion, 20 = maximal exertion). Unit of Measure: Borg 6-20 scale
Glucose
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Fasting blood glucose measured to track metabolic changes over pre-season. Unit of Measure: mg/dL
Cholesterol
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Total serum cholesterol measured to assess lipid profile adaptations. Unit of Measure: mg/dL
Triglycerides
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Serum triglycerides measured to monitor metabolic response to training. Unit of Measure: mg/dL
SGOT (AST)
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Serum glutamic-oxaloacetic transaminase measured to assess liver/muscle stress. Unit of Measure: U/L
SGPT (ALT)
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Serum glutamic-pyruvic transaminase measured to monitor liver/muscle stress. Unit of Measure: U/L
Creatine Phosphokinase (CPK)
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: CPK measured to detect skeletal muscle damage. Unit of Measure: U/L
Myoglobin
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Myoglobin measured as a marker of muscle damage. Unit of Measure: ng/mL
Iron
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Serum iron measured to assess iron status. Unit of Measure: µg/dL
Ferritin
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Serum ferritin measured to monitor iron storage. Unit of Measure: ng/mL
C-Reactive Protein (CRP)
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: CRP measured as a marker of systemic inflammation. Unit of Measure: mg/L
High-sensitivity CRP (hs-CRP)
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: hs-CRP measured to detect low-grade inflammation. Unit of Measure: mg/L
Interleukin-6 (IL-6)
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: IL-6 measured from serum to assess inflammatory response. Unit of Measure: pg/mL
Tumor Necrosis Factor-alpha (TNF-α)
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: TNF-α measured as a marker of systemic inflammation. Unit of Measure: pg/mL
Testosterone
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Serum testosterone measured to assess hormonal adaptations. Unit of Measure: ng/dL
Cortisol
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Serum cortisol measured to monitor stress response. Unit of Measure: µg/dL
Testosterone-Cortisol Ratio
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Calculated ratio to estimate anabolic-catabolic balance. Unit of Measure: Ratio
Red Blood Cells (RBC)
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: RBC count measured from blood to assess oxygen transport capacity. Unit of Measure: million cells/µL
Hemoglobin
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Hemoglobin measured to evaluate oxygen-carrying capacity. Unit of Measure: g/dL
Hematocrit
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Hematocrit measured as percentage of RBC in blood. Unit of Measure: %
White Blood Cells (WBC)
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: WBC count measured to monitor immune function. Unit of Measure: cells/µL
Platelets
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Platelet count measured to assess hematological health. Unit of Measure: cells/µL
Countermovement Jump Height
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Jump height measured (cm) to assess lower-limb explosive power. Unit of Measure: cm
Knee Extensor Power, Dominant Leg
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Measured using isokinetic dynamometer. Unit of Measure: Watts
Knee Extensor Power, Non-Dominant Leg
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Measured using isokinetic dynamometer. Unit of Measure: Watts
Knee Flexor Power, Dominant Leg
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Measured using isokinetic dynamometer. Unit of Measure: Watts
Knee Flexor Power, Non-Dominant Leg
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Measured using isokinetic dynamometer. Unit of Measure: Watts
10-m Sprint Time
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Sprint time measured using photocell gates; lower times indicate better performance. Unit of Measure: seconds
T-Test Agility
Time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).
Description: Participants perform T-test agility course; lower times indicate better agility. Unit of Measure: seconds
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 19 Sep 2025.
- Individual participant dataSharing planned: Yes
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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.
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?
An observational study of Athletic Performance and Soccer, run by Emmanouil D. Zacharakis at 1 site in Greece.
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 8 inclusion and 4 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: enrolling by invitation, as of the sponsor's last update on 19 Sep 2025. 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 Greece. 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?
This study is still under way. Results are not available in the source record yet.
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?
Body Mass (time frame: Each measure assessed at Baseline (pre-season start), 4 weeks (mid-pre-season), and 8 weeks (pre-competition phase).). The study lists 31 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 19 Sep 2025.