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Effect of Aging and Aerobic Fitness Level on Heat Dissipation

22 gennaio 2020 aggiornato da: 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.

Panoramica dello studio

Stato

Completato

Condizioni

Intervento / Trattamento

Descrizione dettagliata

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.

Tipo di studio

Interventistico

Iscrizione (Effettivo)

431

Fase

  • Non applicabile

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Luoghi di studio

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

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

Da 9 anni a 60 anni (Bambino, Adulto)

Accetta volontari sani

Sì

Sessi ammissibili allo studio

Tutto

Descrizione

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

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Prevenzione
  • Assegnazione: N / A
  • Modello interventistico: Assegnazione di gruppo singolo
  • Mascheramento: Nessuno (etichetta aperta)

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Sperimentale: 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.
Comportamentale: 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.

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Aerobic fitness level
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Petros Dinas

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio (Effettivo)

1 maggio 2014

Completamento primario (Effettivo)

30 ottobre 2018

Completamento dello studio (Effettivo)

30 ottobre 2018

Date di iscrizione allo studio

Primo inviato

16 gennaio 2020

Primo inviato che soddisfa i criteri di controllo qualità

22 gennaio 2020

Primo Inserito (Effettivo)

27 gennaio 2020

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

27 gennaio 2020

Ultimo aggiornamento inviato che soddisfa i criteri QC

22 gennaio 2020

Ultimo verificato

1 gennaio 2020

Maggiori informazioni

Termini relativi a questo studio

Parole chiave

Termini MeSH pertinenti aggiuntivi

Altri numeri di identificazione dello studio

  • 10. Aging and heat loss

Piano per i dati dei singoli partecipanti (IPD)

Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?

INDECISO

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

No

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

No

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .

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