Phosphatidylserine, Taurine, and Caffeine for Cognitive Fatigue in Professional Football Players (TCPS-Foot)
Neurocognitive Fatigue Resistance, Visual Search Efficiency, and Tactical Decision-Making After Phosphatidylserine-Containing Taurine-Caffeine Supplementation in Professional Male Football Players
Tutkimuksen yleiskatsaus
Tila
Tila
Ehdot
Ehdot
Interventio / Hoito
Interventio / Hoito
Yksityiskohtainen kuvaus
Opintotyyppi
Opintotyyppi
Ilmoittautuminen (Todellinen)
Ilmoittautuminen
Vaihe
Vaihe
- Ei sovellettavissa
Yhteystiedot ja paikat
Opiskeluyhteys
Opiskeluyhteys
- Nimi: Krzysztof Maciej Mizera, PhD
- Puhelinnumero: +48508356718
- Sähköposti: krzysztofmizera@o2.pl
Opiskelupaikat
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Lodz, Puola
- Professional Football Training Center
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Warsaw, Puola
- Professional Football Training Center
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Osallistumiskriteerit
Kelpoisuusvaatimukset
Kelpoisuusvaatimukset
Opintokelpoiset iät
- Aikuinen
Hyväksyy terveitä vapaaehtoisia
Kuvaus
Inclusion Criteria:
- Male professional outfield football players aged 18 to 37 years.
- First-team players or selected U19 players aged 18 years or older who are regularly integrated into first-team training.
- Regular participation in club training.
- At least 5 years of systematic football training experience.
- Free from injury or illness limiting full participation in training and testing.
- Normal or corrected-to-normal vision.
- Ability to complete the laboratory and field-based testing procedures.
- Written informed consent provided before participation.
Exclusion Criteria:
- Goalkeepers.
- Current injury or illness limiting full participation in testing.
- Neurological disease.
- Recent concussion or head trauma.
- Uncorrected visual impairment.
- Use of phosphatidylserine, nootropic agents, or strong stimulants during the previous 4 weeks.
- Non-standard caffeine intake on testing days.
- Failure to comply with pre-test standardization procedures.
- Failed eye-tracker calibration.
- Loss of more than 30% of gaze data during the football-specific decision-making task.
- Withdrawal of consent.
Opintosuunnitelma
Miten tutkimus on suunniteltu?
Suunnittelun yksityiskohdat
- Ensisijainen käyttötarkoitus: Muut
- Jako: Satunnaistettu
- Inventiomalli: Rinnakkaistehtävä
- Naamiointi: Nelinkertaistaa
Aseiden lukumäärä
Aseet ja interventiot
Osallistujaryhmä / ArmOsallistujaryhmä / Arm |
Interventio / HoitoInterventio / Hoito |
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Placebo Comparator: Placebo
Participants randomized to this arm will receive an inert placebo for 28 days.
The placebo will be provided in identical coded packs matched for appearance, number of units, and packaging with the active supplements.
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Inert placebo matched with the active supplements for appearance, number of units, and packaging.
The placebo will be administered for 28 days.
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Active Comparator: Taurine Plus Caffeine
Participants randomized to this arm will receive taurine 1500 mg/day plus caffeine 200 mg/day for 28 days.
On training and testing days, the supplement will be consumed approximately 60 minutes before the main training session or testing procedure.
On non-training days, it will be consumed at a consistent morning time.
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Taurine 1500 mg/day plus caffeine 200 mg/day administered for 28 days.
On training and testing days, the supplement will be consumed approximately 60 minutes before the main training session or testing procedure.
On non-training days, it will be consumed at a consistent morning time.
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Kokeellinen: Taurine, Caffeine, and Phosphatidylserine
Participants randomized to this arm will receive taurine 1500 mg/day plus caffeine 200 mg/day plus phosphatidylserine 600 mg/day for 28 days.
On training and testing days, the supplement will be consumed approximately 60 minutes before the main training session or testing procedure.
On non-training days, it will be consumed at a consistent morning time.
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Taurine 1500 mg/day plus caffeine 200 mg/day plus phosphatidylserine 600 mg/day administered for 28 days.
On training and testing days, the supplement will be consumed approximately 60 minutes before the main training session or testing procedure.
On non-training days, it will be consumed at a consistent morning time.
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Mitä tutkimuksessa mitataan?
Ensisijaiset tulostoimenpiteet
Ensisijaiset tulostoimenpiteet
Tulosmittaus |
Toimenpiteen kuvaus |
Aikaikkuna |
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Tactical Inhibitory Decision Accuracy Under Neurocognitive Load
Aikaikkuna: Baseline and 28 days of supplementation
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Tactical inhibitory decision accuracy will be assessed using football-specific video clips requiring inhibition of an immediately attractive but suboptimal tactical action.
Responses will be scored as 1 point for an optimal decision, 0.5 points for an acceptable decision, and 0 points for an incorrect decision.
The outcome will be calculated as the mean score across inhibitory tactical clips.
The score ranges from 0 to 1, with higher values indicating better tactical inhibitory decision accuracy.
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Baseline and 28 days of supplementation
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Toissijaiset tulostoimenpiteet
Toissijaiset tulostoimenpiteet
Tulosmittaus |
Toimenpiteen kuvaus |
Aikaikkuna |
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Overall Football-Specific Optimal Decision Rate
Aikaikkuna: Baseline and 28 days of supplementation
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Overall football-specific decision accuracy will be assessed using video-based offensive and transitional football situations.
Players will select the most appropriate tactical option under time pressure.
The outcome will be expressed as the percentage of correct or expert-rated optimal decisions, with higher values indicating better decision-making accuracy.
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Baseline and 28 days of supplementation
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Football-Specific Decision Time
Aikaikkuna: Baseline and 28 days of supplementation
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Decision time will be assessed during the football-specific video decision-making task.
It will be measured as the time taken to select a tactical response after the critical decision point.
The outcome will be expressed in milliseconds, with lower values indicating faster decision-making.
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Baseline and 28 days of supplementation
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Impulsive Tactical Error Rate
Aikaikkuna: Baseline and 28 days of supplementation
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Impulsive tactical errors will be assessed during football-specific video clips.
These errors will include selections of immediately attractive but suboptimal tactical options, such as inappropriate forward actions, low-quality shots, or forced progressive decisions when a safer or more appropriate option is available.
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Baseline and 28 days of supplementation
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Stroop/Flanker Time-on-Task Reaction-Time Trajectory
Aikaikkuna: Baseline and 28 days of supplementation
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Correct-trial reaction time will be assessed across six consecutive 5-minute epochs of the 30-minute high-load Stroop/Flanker task.
Time-on-task performance decrement will be quantified from the within-session trajectory of reaction time across successive epochs, with a greater increase in reaction time indicating greater neurocognitive performance deterioration and a smaller increase indicating greater neurocognitive fatigue resistance.
Response accuracy across epochs will be reported as a complementary measure.
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Baseline and 28 days of supplementation
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Stroop/Flanker Reaction-Time Variability
Aikaikkuna: Baseline and 28 days of supplementation
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Reaction-time variability will be assessed during the 30-minute high-load Stroop/Flanker task.
It will be quantified from valid correct-trial reaction times as a within-participant measure of response-time variability and expressed in milliseconds, with greater variability indicating lower response stability.
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Baseline and 28 days of supplementation
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Post-Task Mental Fatigue
Aikaikkuna: Baseline and 28 days of supplementation
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Perceived mental fatigue will be assessed immediately before and immediately after the 30-minute neurocognitive-load task using a 0-10 numerical rating scale, with higher scores indicating greater perceived mental fatigue.
The registered outcome will be the post-task mental-fatigue score assessed at baseline and after 28 days of supplementation.
The acute pre-to-post task change will additionally be used as a manipulation check of the neurocognitive-load protocol.
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Baseline and 28 days of supplementation
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Time to First Fixation on the Optimal Tactical Area of Interest
Aikaikkuna: Baseline and 28 days of supplementation
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Time to first fixation on the optimal tactical option will be assessed using screen-based eye-tracking during the football-specific video decision-making task.
The outcome will be expressed in milliseconds and will reflect how quickly the player visually orients toward the expert-defined optimal option.
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Baseline and 28 days of supplementation
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Dwell Time on the Optimal Tactical Area of Interest
Aikaikkuna: Baseline and 28 days of supplementation
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Dwell time on the optimal tactical option will be assessed using screen-based eye-tracking during the football-specific video decision-making task.
The outcome will be expressed as the percentage of total viewing time spent fixating on the expert-defined optimal tactical option.
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Baseline and 28 days of supplementation
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Situational-Awareness Accuracy
Aikaikkuna: Baseline and 28 days of supplementation
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Situational awareness accuracy will be assessed using probes presented after selected football-specific video clips.
These probes will evaluate whether players correctly identified key tactical information, including available space, pressure location, number of defenders, teammate positioning, and defensive-line configuration.
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Baseline and 28 days of supplementation
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Reactive Passing Decision-Selection Accuracy
Aikaikkuna: Baseline and 28 days of supplementation
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Reactive Passing Decision Test accuracy will be assessed during a field-based football-specific task.
Players will dribble into a decision zone and respond to a late visual or situational cue by selecting and executing the optimal passing option.
The outcome will be expressed as the percentage of accurate decisions.
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Baseline and 28 days of supplementation
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Yhteistyökumppanit ja tutkijat
Sponsori
Sponsori
Yhteistyökumppanit
Yhteistyökumppanit
Opintojen ennätyspäivät
Opi tärkeimmät päivämäärät
Opiskelun aloitus (Todellinen)
Opiskelun aloitus
Ensisijainen valmistuminen (Todellinen)
Ensisijainen valmistuminen
Opintojen valmistuminen (Todellinen)
Opintojen valmistuminen
Opintoihin ilmoittautumispäivät
Ensimmäinen lähetetty
Ensimmäinen lähetetty
Ensimmäinen toimitettu, joka täytti QC-kriteerit
Ensimmäinen toimitettu, joka täytti QC-kriteerit
Ensimmäinen Lähetetty (Todellinen)
Ensimmäinen Lähetetty
Tutkimustietojen päivitykset
Viimeisin päivitys julkaistu (Todellinen)
Viimeisin päivitys julkaistu
Viimeisin lähetetty päivitys, joka täytti QC-kriteerit
Viimeisin lähetetty päivitys, joka täytti QC-kriteerit
Viimeksi vahvistettu
Viimeksi vahvistettu
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- Käyttäytymisoireet
- Väsymys
- Patologiset tilat, merkit ja oireet
- Käyttäytyminen
- Merkit ja oireet
- Henkinen väsymys
- Rikkiyhdisteet
- Orgaaniset kemikaalit
- Heterosykliset yhdisteet
- Heterosykliset yhdisteet, 2-rengas
- Heterosykliset yhdisteet, sulatettu rengas
- Lipidit
- Hiilivedyt, asyklinen
- Hiilivety
- Alkaloidit
- Purinonit
- Puriinit
- Alkanit
- Alkaanilaishapot
- Sulfonihappot
- Rikkihappot
- Kalvolipidit
- Ksantines
- Glyserofosfolipidit
- Fosfatidihapot
- Glyserofosfaatit
- Fosfolipidit
- Kofeiini
- Tauriini
- Fosfatidyserinit
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