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Ecklonia Cava Supplementation and Cycling Performance

20. maj 2026 opdateret af: University of Exeter

Acute Ecklonia Cava Supplementation Fails to Enhance Performance in Trained Cyclists

The goal of this clinical trial (randomised, double-blind, placebo-controlled crossover study) is to investigate whether supplementation with Ecklonia cava, a natural extract derived from brown seaweed, affects exercise performance and physiological responses in trained cyclists.

The main questions it aims to answer are:

Does Ecklonia cava supplementation improve cycling performance, including power output during steady-state exercise and short maximal sprints? Does Ecklonia cava supplementation influence physiological responses to exercise, such as blood glucose, blood lactate, heart rate, and oxygen consumption?

Researchers will compare Ecklonia cava supplementation to a placebo (a look-alike substance with no active ingredients) to determine whether the supplement has any effect on performance or physiological responses.

In this crossover design, all participants will receive both the Ecklonia cava supplement and the placebo on separate occasions, with a washout period between conditions.

Participants will:

Ingest either Ecklonia cava or a placebo 30 minutes before exercise testing Complete a 60-minute cycling protocol at a moderate intensity Perform repeated short-duration maximal sprint efforts following the steady-state exercise Attend laboratory testing sessions under both supplement and placebo conditions Undergo measurements of physiological responses, including blood glucose, blood lactate, heart rate, oxygen consumption, and respiratory exchange ratio Have exercise performance assessed through measures of power output during cycling

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

12

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

      • Kingston upon Thames, Det Forenede Kongerige, KT1 2EE
        • Department of Applied and Human Sciences

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen

Tager imod sunde frivillige

Ja

Beskrivelse

Inclusion Criteria:

  • experienced in cycling (defined as completing at least four hours of cycle training per week with a minimum of two years of experience)

Exclusion Criteria:

  • Smoker
  • cardiovascular disease
  • anti-hypertensive medication

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Crossover opgave
  • Maskning: Dobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Placebo komparator: Placebo tilskud
Placebo Supplementation
Eksperimentel: Ecklonia Cava Supplementation
Ecklonia Cava Supplementation

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Peak Power Output During Sprint Performance (Watts)
Tidsramme: Immediately after the 60-minute submaximal cycling protocol, 30 minutes after supplementation
Peak power output achieved during 20-second maximal sprint efforts performed following a fixed-intensity (55% Wmax) 60-minute cycling protocol
Immediately after the 60-minute submaximal cycling protocol, 30 minutes after supplementation
Mean Power Output During Sprint Performance (Watts)
Tidsramme: Immediately after the 60-minute submaximal cycling protocol, 30 minutes after supplementation
Mean power output recorded during repeated 20-second maximal sprint efforts following steady-state cycling
Immediately after the 60-minute submaximal cycling protocol, 30 minutes after supplementation
Blood Lactate Concentration During Sprint Cycling (mmol/L)
Tidsramme: Repeated sprint cycling (3) completed immediately after the 60-minute submaximal cycling protocol, a blood sample taken 2 minutes after each sprint cycling bout. Following each 30-minute supplementation protocol.
Blood lactate concentration measured following each repeated sprint efforts (3)
Repeated sprint cycling (3) completed immediately after the 60-minute submaximal cycling protocol, a blood sample taken 2 minutes after each sprint cycling bout. Following each 30-minute supplementation protocol.
Blood Glucose Concentration During Sprint Cycling (mmol/L)
Tidsramme: Repeated sprint cycling (3) completed immediately after the 60-minute submaximal cycling protocol, a blood sample taken 2 minutes after each sprint cycling bout. Following each 30-minute supplementation protocol.
Blood glucose concentration measured following repeated sprint efforts
Repeated sprint cycling (3) completed immediately after the 60-minute submaximal cycling protocol, a blood sample taken 2 minutes after each sprint cycling bout. Following each 30-minute supplementation protocol.

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Heart Rate During Submaximal Cycling (beats per minute)
Tidsramme: During the 60-minute submaximal cycling protocol, 30 minutes after supplementation (each condition)
Average heart rate measured during a 60-minute steady-state cycling protocol performed at 55% maximal power output
During the 60-minute submaximal cycling protocol, 30 minutes after supplementation (each condition)
Blood Lactate Concentration During Submaximal Cycling (mmol/L)
Tidsramme: Every 20-minutes during the 60-minute submaximal cycling protocol, 30 minutes after supplementation
Blood lactate concentration measured during steady-state cycling at 55% maximal power output
Every 20-minutes during the 60-minute submaximal cycling protocol, 30 minutes after supplementation
Blood Glucose Concentration During Submaximal Cycling (mmol/L)
Tidsramme: Every 20-minutes during the 60-minute submaximal cycling protocol, 30 minutes after supplementation
Blood glucose concentration measured during steady-state cycling at 55% maximal power output
Every 20-minutes during the 60-minute submaximal cycling protocol, 30 minutes after supplementation
Oxygen Consumption (VO₂) During Submaximal Cycling (ml/kg/min)
Tidsramme: During the 60-minute submaximal cycling protocol, 30 minutes after supplementation
Oxygen consumption measured using indirect calorimetry during steady-state cycling
During the 60-minute submaximal cycling protocol, 30 minutes after supplementation
Respiratory Exchange Ratio (RER) During Submaximal Cycling
Tidsramme: During the 60-minute submaximal cycling protocol, 30 minutes after supplementation
Respiratory exchange ratio measured during steady-state cycling using expired gas analysis
During the 60-minute submaximal cycling protocol, 30 minutes after supplementation

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Samarbejdspartnere

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

1. marts 2020

Primær færdiggørelse (Faktiske)

21. september 2020

Studieafslutning (Faktiske)

2. december 2020

Datoer for studieregistrering

Først indsendt

5. maj 2026

Først indsendt, der opfyldte QC-kriterier

20. maj 2026

Først opslået (Faktiske)

28. maj 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

28. maj 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

20. maj 2026

Sidst verificeret

1. maj 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • 1501 (CSL Behring)

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

JA

IPD-planbeskrivelse

Available on request.

IPD-deling Understøttende informationstype

  • STUDY_PROTOCOL
  • SAP
  • ICF

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

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