Placebo Effect in Field-Based Physical Performance
Psychophysiological Mechanisms of the Placebo Effect on Physical Performance in Field Settings
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
Undersøgelsestype
Undersøgelsestype
Tilmelding (Anslået)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiekontakt
Studiekontakt
- Navn: Jakub Malik, PhD
- Telefonnummer: +48739975701
- E-mail: malik@awf.poznan.pl
Studiesteder
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Greater Poland Voivodeship
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Poznan, Greater Poland Voivodeship, Polen
- Poznań University of Physical Education
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Kontakt:
- Jakub Malik, PhD
- Telefonnummer: +48739975701
- E-mail: malik@awf.poznan.pl
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-
Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
- Voksen
Tager imod sunde frivillige
Beskrivelse
Inclusion Criteria:
- Age between 20 and 35 years,
- Healthy adults,
- Regular physical activity,
- Normal or corrected-to-normal vision,
- Habitual caffeine consumption.
Exclusion Criteria:
- History of neurological, psychiatric, cardiovascular, or metabolic disorders,
- Current use of medication or supplements affecting the central nervous system,
- Musculoskeletal injuries that would impair physical performance,
- No habitual caffeine consumption or severe negative side effects of caffeine,
- Diagnosed sleep disorders or chronic fatigue,
- Diagnosed major depressive disorder or other severe psychiatric conditions,
- Presence of any menstrual disorders,
- Inability to attend all experimental study visits.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Grundvidenskab
- Tildeling: Randomiseret
- Interventionel model: Parallel tildeling
- Maskning: Firedobbelt
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
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Eksperimentel: Caffeine Group
Participants ingest a single dose of caffeine (6mg/kg body mass) prior to a field-based exercise protocol (e.g., Cooper test or Repeated Sprint Ability).
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Anhydrous caffeine administered in an encapsulated form at a dosage of 6mg per kilogram of body mass, 30-60 minutes before the exercise protocol.
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Aktiv komparator: Placebo Group
Participants ingest a single dose of placebo (corn starch) in an identical capsule prior to a field-based exercise protocol.
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Corn starch administered in an identical encapsulated form as the active caffeine, 30-60 minutes before the exercise protocol.
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Sham-komparator: Control Group
Participants perform the same field-based exercise protocol without ingesting any capsule or active substance.
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Participants perform the same exercise protocols without any capsule or substance administration.
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Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Physical Performance Capacity (total distance in running, metres)
Tidsramme: Measured during the exercise protocol immediately following administration of the study intervention.
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Total physical work capacity measured as the total running distance (metres) completed during the standardized exercise protocol.
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Measured during the exercise protocol immediately following administration of the study intervention.
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Physical Performance Capacity (total work in Joules for cycling)
Tidsramme: Measured during the exercise protocol immediately following administration of the study intervention.
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Total physical work capacity measured as the total mechanical work (Joules) completed during the standardized cycling exercise protocol.
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Measured during the exercise protocol immediately following administration of the study intervention.
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Physical Performance Capacity (exercise duration until exhaustion, minutes)
Tidsramme: Measured during the exercise protocol immediately following administration of the study intervention.
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Total physical work capacity measured as exercise duration until volitional exhaustion during the standardized exercise protocol.
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Measured during the exercise protocol immediately following administration of the study intervention.
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Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Exercise Heart Rate (bpm)
Tidsramme: Continuously monitored during the exercise protocol immediately following administration of the study intervention.
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Heart rate (beats per minute) recorded continuously throughout the standardized exercise protocol.
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Continuously monitored during the exercise protocol immediately following administration of the study intervention.
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Cognitive Heart Rate (bpm)
Tidsramme: Measured during cognitive testing immediately before and immediately after the exercise protocol.
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Heart rate recorded during standardized cognitive performance tasks.
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Measured during cognitive testing immediately before and immediately after the exercise protocol.
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Post-Exercise Heart Rate Recovery (bpm)
Tidsramme: Continuously monitored during the first 5 minutes immediately following completion of the exercise protocol.
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Heart rate recorded during the post-exercise recovery period.
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Continuously monitored during the first 5 minutes immediately following completion of the exercise protocol.
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Cognitive Reaction Time (ms)
Tidsramme: Measured immediately before and immediately after the exercise protocol.
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Reaction time measured during standardized cognitive tasks (e.g., Psychomotor Vigilance Test, Stroop Test, Flanker Test).
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Measured immediately before and immediately after the exercise protocol.
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Rating of Perceived Exertion (Borg Scale, points)
Tidsramme: Measured immediately after completion of the exercise protocol.
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Perceived exertion assessed using the Borg Rating of Perceived Exertion Scale (6-20).
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Measured immediately after completion of the exercise protocol.
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Biomechanical Kinematic Profile (cm)
Tidsramme: Continuously monitored during the exercise protocol immediately following administration of the study intervention.
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Continuous recording of kinematic parameters derived from wearable sensors, including step length and vertical oscillation.
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Continuously monitored during the exercise protocol immediately following administration of the study intervention.
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Biomechanical Kinematic Profile (ms)
Tidsramme: Continuously monitored during the exercise protocol immediately following administration of the study intervention.
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Continuous recording of stance time derived from wearable sensor data.
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Continuously monitored during the exercise protocol immediately following administration of the study intervention.
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Biomechanical Kinematic Profile (steps/min)
Tidsramme: Continuously monitored during the exercise protocol immediately following administration of the study intervention.
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Continuous recording of cadence derived from wearable sensor data.
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Continuously monitored during the exercise protocol immediately following administration of the study intervention.
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Anthropometric Indices (kg)
Tidsramme: Measured at the start of the protocol.
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Body mass expressed in kilograms.
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Measured at the start of the protocol.
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Anthropometric Indices (m)
Tidsramme: Measured at the start of the protocol.
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Height expressed in metres.
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Measured at the start of the protocol.
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Body composition (fat-free mass, fat mass) (kg)
Tidsramme: Measured at the start of the protocol.
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Assessment of body composition (fat-free mass, fat mass) (kg) will be performed at the start of the protocol.
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Measured at the start of the protocol.
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Body composition (fat-free mass, fat mass) (%)
Tidsramme: Measured at the start of the protocol.
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Assessment of body composition (fat-free mass, fat mass) (%) will be performed at the start of the protocol.
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Measured at the start of the protocol.
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Body composition (total body water) (L)
Tidsramme: Measured at the start of the protocol.
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Assessment of body composition (total body water) (L) will be performed at baseline at the start of the protocol.
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Measured at the start of the protocol.
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Body composition (total body water) (%)
Tidsramme: Measured at the start of the protocol.
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Assessment of body composition (total body water) (%) will be performed at baseline at the start of the protocol.
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Measured at the start of the protocol.
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Exercise Heart Rate Variability (ms)
Tidsramme: Continuously monitored during the exercise protocol immediately following administration of the study intervention.
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Heart rate variability recorded continuously throughout the standardized exercise protocol to assess autonomic regulation.
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Continuously monitored during the exercise protocol immediately following administration of the study intervention.
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Cognitive Heart Rate Variability (ms)
Tidsramme: Measured during cognitive testing immediately before and immediately after the exercise protocol.
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Heart rate variability recorded during standardized cognitive performance tasks.
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Measured during cognitive testing immediately before and immediately after the exercise protocol.
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Post-Exercise Heart Rate Variability Recovery (ms)
Tidsramme: Continuously monitored during the first 5 minutes immediately following completion of the exercise protocol.
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Heart rate variability recorded during the post-exercise recovery period.
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Continuously monitored during the first 5 minutes immediately following completion of the exercise protocol.
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Cognitive Accuracy (%)
Tidsramme: Measured immediately before and immediately after the exercise protocol.
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Accuracy measured during standardized cognitive tasks (e.g., Psychomotor Vigilance Test, Stroop Test, Flanker Test).
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Measured immediately before and immediately after the exercise protocol.
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Performance Expectancy (points)
Tidsramme: Measured immediately after completion of the exercise protocol.
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Measured immediately before the exercise protocol following administration of the study intervention.
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Measured immediately after completion of the exercise protocol.
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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Efterforskere
Efterforskere
- Ledende efterforsker: Jakub Malik, PhD, Poznan University of Physical Education, Department of Sports Psychology
Datoer for undersøgelser
Studer store datoer
Studiestart (Anslået)
Studiestart
Primær færdiggørelse (Anslået)
Primær færdiggørelse
Studieafslutning (Anslået)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- 152-1-26
- 2025/57/N/NZ4/04470 (Andet bevillings-/finansieringsnummer: National Science Centre)
Plan for individuelle deltagerdata (IPD)
Planlægger du at dele individuelle deltagerdata (IPD)?
IPD-planbeskrivelse
Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter
Studerer et amerikansk FDA-reguleret lægemiddelprodukt
Studerer et amerikansk FDA-reguleret enhedsprodukt
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