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Effect of Aging and Aerobic Fitness Level on Heat Dissipation

22. Januar 2020 aktualisiert von: Petros Dinas

Effect of Aging and Aerobic Fitness Level on Heat Dissipation in Neutral Conditions

In the context of global aging, the health risk factors associated with exercising or working in the heat for aging population are exacerbated by the rising in global surface temperatures. The purpose of this investigation is to determine at what age the heat loss decrements occur and to examine if aerobic fitness level can affect the heat loss capacity in neutral environmental conditions.

Studienübersicht

Status

Abgeschlossen

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

All trials were conducted to indoor gyms with the same environmental temperature and relative humidity, 26 - 30oC and 40-50% respectively, to ensure no difference in body temperature were due to the external thermal stress. The participants were instructed to refrain from intense exercise as well as alcohol and caffeine consumption for 24 hours prior to experimental trial and to had a light meal 2h before their arrival.

Upon arrival, participants would have to wear running shoes, light and short running shorts and light cotton socks. Participants received comprehensive instructions about the shuttle run test and the whole process of measurements. Firstly participants answered the International Physical Activity Questionnaire (IPAQ). Thereafter, anthropometrics data (weight and height) were evaluated as well as the body temperature in external ear canal and axillary. All participants followed five minutes warming up and then performed to 20 m shuttle run test until their volitional limit. Once the participants could no longer run, the test was over and the number of laps was recorded. After the end of the shuttle run, were evaluated the body temperature and the weight of each participants. No fluids consumptions were permitted until the second weighing. They were weighed twice, at baseline and at the end of the running test with a precision weight scale (Kern DE 150K2D, KERN & SOHN GmbH, Balingen, Germany).

Environmental data including air temperature and relative humidity were measured continuously using a portable weather station (LCD Digital Temperature & Humidity Meter HTC-1). The weather station was placed 1 meter above the ground according to the manufacturer's guidelines.

Studientyp

Interventionell

Einschreibung (Tatsächlich)

431

Phase

  • Unzutreffend

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienorte

  • Griechenland
    • Thessaly
      • Trikala, Thessaly, Griechenland, 42100
        • Department of Exercise Science, University of Thessaly
      • Tríkala, Thessaly, Griechenland, 42100
        • FAME Lab, Department of Exercise Science, University of Thessaly

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

9 Jahre bis 60 Jahre (Kind, Erwachsene)

Akzeptiert gesunde Freiwillige

Ja

Studienberechtigte Geschlechter

Alle

Beschreibung

Inclusion Criteria:

  • Healthy children and adults

Exclusion Criteria:

  • Diagnosed chronic medical condition;
  • Symptoms of acute illness;
  • Recent (past 4 weeks) usage of medications known to affect the circulatory system, the thyroid, the pituitary function, or the metabolic status

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Verhütung
  • Zuteilung: N / A
  • Interventionsmodell: Einzelgruppenzuweisung
  • Maskierung: Keine (Offenes Etikett)

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Experimental: Shuttle run test
At the shuttle run test, participants were required to run between two lines 20 meters apart, while keeping pace with audio signals emitted from a pre-recorded CD. The frequency of the sound signals increases in such way that running speed was increased by 0.5 km h-1 each minute from the starting speed 8.5 km h-1.
Verhalten: Shuttle run test
At the shuttle run test, participants were required to run between two lines 20 meters apart, while keeping pace with audio signals emitted from a pre-recorded CD. The frequency of the sound signals increases in such way that running speed was increased by 0.5 km h-1 each minute from the starting speed 8.5 km h-1.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Aerobic fitness level
Zeitfenster: Through study completion (a shuttle run test), an average of 15 minutes
Aerobic fitness level was defined by peak oxygen uptake (VO2peak). VO2peak was determined by a 20m shuttle run test. The number of the last announced stage and the equivalent maximal speed from participants' performance were used for its VO2peak estimation
Through study completion (a shuttle run test), an average of 15 minutes
Change from baseline ear canal temperature
Zeitfenster: Change from baseline to the end of study completion (a shuttle run test), an average of 15 minutes
Ear canal temperature was recorded twice, at baseline and at the end of the shuttle run test (three times each at the left ear and recorded the mean value), using ear thermometer (IR100, MicrolifeSwitzerland)
Change from baseline to the end of study completion (a shuttle run test), an average of 15 minutes
Change from baseline axillary temperature
Zeitfenster: Change from baseline to the end of study completion (a shuttle run test), an average of 15 minutes
Axillary temperature was recorded twice, at baseline and at the end of the shuttle run test, using the electronic digital thermometer (EcoTemp, OMRON, Japan)
Change from baseline to the end of study completion (a shuttle run test), an average of 15 minutes
Physical activity levels
Zeitfenster: Once before the shuttle run test
Physical activity of the subject in a usual week was recorded via International Physical Activity Questionnaire. Scores include steps/day and METs/week, with no lower and upper limit
Once before the shuttle run test
Change from baseline body weight
Zeitfenster: Change from baseline to the end of study completion (a shuttle run test), an average of 15 minutes
Weight was recorded twice, at baseline and at the end of the shuttle run test, using a precision weight scale (Kern DE 150K2D, KERN & SOHN GmbH, Balingen, Germany
Change from baseline to the end of study completion (a shuttle run test), an average of 15 minutes
Change from baseline whole Body Sweat Rate
Zeitfenster: Change from baseline to the end of study completion (a shuttle run test), an average of 15 minutes
Whole Body Sweat Rate was determined by the difference of the pre-test and post-test weight of the participants
Change from baseline to the end of study completion (a shuttle run test), an average of 15 minutes
Air temperature
Zeitfenster: Up to 30 minutes, during a one complete shuttle run test
Air temperature was measured continuously using a portable weather station (LCD Digital Temperature & Humidity Meter HTC-1placed) 1 meter above the ground according to the manufacturer's guidelines
Up to 30 minutes, during a one complete shuttle run test
Relative humidity
Zeitfenster: Up to 30 minutes, during a one complete shuttle run test
Relative humidity was measured continuously using a portable weather station (LCD Digital Temperature & Humidity Meter HTC-1) placed 1 meter above the ground according to the manufacturer's guidelines
Up to 30 minutes, during a one complete shuttle run test

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Petros Dinas

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Tatsächlich)

1. Mai 2014

Primärer Abschluss (Tatsächlich)

30. Oktober 2018

Studienabschluss (Tatsächlich)

30. Oktober 2018

Studienanmeldedaten

Zuerst eingereicht

16. Januar 2020

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

22. Januar 2020

Zuerst gepostet (Tatsächlich)

27. Januar 2020

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

27. Januar 2020

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

22. Januar 2020

Zuletzt verifiziert

1. Januar 2020

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Schlüsselwörter

Zusätzliche relevante MeSH-Bedingungen

Andere Studien-ID-Nummern

  • 10. Aging and heat loss

Plan für individuelle Teilnehmerdaten (IPD)

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UNENTSCHIEDEN

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

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