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Breathing Training to Improve Human Performance at High Altitude

15. april 2022 opdateret af: University of Colorado, Denver
Individuals traveling to altitudes above 8,000 feet may suffer from impaired exercise and cognitive performance, and acute mountain sickness (AMS). Decreased barometric pressure, which leads to low blood oxygen levels, is the primary cause of these disorders. Symptoms of AMS are characterized by headache, nausea, vomiting, dizziness, fatigue, and difficulty sleeping. The goal of this research is to identify whether Respiratory Muscle Training will improve physical and cognitive performance, and reduce the symptoms of AMS, at simulated high altitude.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

28

Fase

  • Ikke anvendelig

Kontakter og lokationer

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

Studiesteder

  • Forenede Stater
    • Colorado
      • Aurora, Colorado, Forenede Stater, 80045
        • Altitude Research Center

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

18 år til 45 år (Voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Han

Beskrivelse

Inclusion Criteria:

  • Healthy
  • Men, ages 18-45 who are able to achieve at least 3.5 watts/kg of body weight during the peak oxygen uptake test

Exclusion Criteria:

  • Less than 18 years old
  • Greater than 45 years old
  • Have a body mass index greater than or equal to 30
  • Have been recent smokers (tobacco or e-cigarettes)
  • Current recreational or medical marijuana users
  • Currently taking any medication (over-the-counter or prescription) or herbal supplements
  • Participants who are unable to tolerate drinking only two, 6-ounce caffeinated beverages per day of the study
  • Participants who are legally blind
  • Participants who have been to altitudes above Denver (1609m or 5280ft), including air travel, in the 3 weeks prior to the start of the study or with plans to do so during the study
  • Participants who have suffered a significant head injury, have anemia or sickle cell trait or disease, have active peptic ulcer disease, diabetes, hypertension, heart disease, HIV/AIDS, glaucoma, kidney disease, liver disease/cirrhosis, adrenal gland failure, hyponatremia/hypokalemia, tuberculosis
  • Participants who have a current herpes infection or any other current type of viral or bacterial infection
  • Participants with seizure disorders or history of migraines

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Forebyggelse
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Enkelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Træning af respiratoriske muskler
Enhed: Respiratory Muscle Training
Subjects will breathe through a custom isocapnic Respiratory Muscle Training method developed in-house. The initial breathing frequency will be 30 breaths per minute. Subsequent sessions will begin with 20 minutes of breathing at the highest rate attained on the previous training day. During the last 10 minutes of each session, breathing rate will increase by 1-2 breaths/min.
Sham-komparator: Sham Breathing Training
Enhed: Sham Breathing Training
Each subject in the sham group will be prompted to hold his breath for 10 seconds every 30 seconds (two times each minute) while breathing on a circuit visibly identical to that used in Respiratory Muscle Training. The subject will breathe ambient air normally after each breath hold. Each sham session will last 30 minutes total.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change in exercise performance during acute simulated high-altitude exposure as measured by a peak oxygen uptake test and time to complete a 720kJ (40km) time trial on a Velotron cycle ergometer.
Tidsramme: Baseline and during acute simulated high-altitude exposure. (2 days, 12 hours per day)
Determine whether Respiratory Muscle Training performed 3x a week for 30 minutes per session is effective in improving exercise performance during acute simulated high-altitude exposure.
Baseline and during acute simulated high-altitude exposure. (2 days, 12 hours per day)
Change in cognitive function during acute simulated high-altitude exposure as measured by the DANA cognitive test battery.
Tidsramme: Baseline and during acute simulated high-altitude exposure. (2 days, 12 hours per day)
Determine whether Respiratory Muscle Training performed 3x a week for 30 minutes per session improves cognitive function during simulated high-altitude exposure.
Baseline and during acute simulated high-altitude exposure. (2 days, 12 hours per day)
Change in incidence and severity of acute mountain sickness during acute simulated high-altitude exposure as determined by the Lake Louise Questionnaire (a diagnostic survey of acute mountain sickness).
Tidsramme: Baseline and during acute simulated high-altitude exposure. (2 days, 12 hours per day)
Determine whether Respiratory Muscle Training performed 3x a week for 30 minutes per session is effective in reducing incidence and severity of AMS during acute simulated high-altitude exposure.
Baseline and during acute simulated high-altitude exposure. (2 days, 12 hours per day)

Samarbejdspartnere og efterforskere

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

Sponsor

University of Colorado, Denver

Samarbejdspartnere

United States Department of Defense

Efterforskere

  • Ledende efterforsker: Robert Roach, PhD, Director, Altitude Research Center

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)

9. august 2018

Primær færdiggørelse (Faktiske)

15. januar 2020

Studieafslutning (Faktiske)

15. januar 2020

Datoer for studieregistrering

Først indsendt

3. maj 2018

Først indsendt, der opfyldte QC-kriterier

17. maj 2018

Først opslået (Faktiske)

21. maj 2018

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

19. april 2022

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

15. april 2022

Sidst verificeret

1. april 2022

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 18-0464

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

Kliniske forsøg med Mountain Sickness Acute

Kliniske forsøg med Respiratory Muscle Training

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