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Influence of Cardio-ventilatory Factors on Exercise Intolerance in Obese Adolescents: Effects of Exercise Training (VENTILOBE)

26. juni 2012 opdateret af: University Hospital, Grenoble

Worldwide, childhood and adolescent obesity has reached epidemic proportions despite major efforts to promote weight reduction. Pediatric obesity commonly presages adult obesity and is associated with the development of weight-related comorbid conditions and increased morbidity.

Regular physical activity is an important modality of obesity management. Despite controversies, poor exercise tolerance has frequently been reported in youth obesity and the cause of this limited exercise tolerance remains unknown. Several factors accompanying obesity may interfere with exercise tolerance in obese populations. Respiratory factors, such as decreased thoracic compliance, increased airway resistance and breathing at low pulmonary volumes are associated with obesity and may impact exercise intolerance in this population. Moreover, even in people with otherwise normal lungs, the normal ventilatory responses to exercise can become constrained in obesity. A thorough understanding of the mechanisms underlying this exercise intolerance remains fundamental in order to favour long term adherence to exercise training. This is especially true in youth populations, in which the management of overweight and obesity must be undertaken as soon as possible, due to the early onset of cardiovascular risk factors.

The main purpose of this study is to determine early-onset cardio-respiratory mortality factors in obese adolescents as well as their relation with exercise intolerance (i.e. dyspnea) when compared with age and gender-paired normal-weight volunteers.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Physiopathological trial. Expected total enrollment : 20 obese adolescents + 20 control subjects Tested treatment: Exercise training (4 hours per week). Treatment duration: 12 weeks

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

40

Fase

  • Ikke anvendelig

Kontakter og lokationer

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

Studiesteder

  • Frankrig
      • Grenoble, Frankrig, 38000
        • CHU Grenoble

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

12 år til 16 år (Barn)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  • Male and female obese adolescents (BMI > IOTF 30, 12-16 years old)

Exclusion Criteria:

  • Cardiovascular pathology
  • Pathology interfering with physical activity (neurological pathology, severe respiratory illness i.e. asthma, renal failure)
  • Diabetes (known or treated)
  • Participation in another study
  • Asthma (known and treated)

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: N/A
  • Interventionel model: Enkelt gruppeopgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Exercise training

12-week supervised exercise-training (ET) program consisting of two 60-min and one 120-min exercise sessions per week which focus mainly on aerobic exercises (cycling, treadmill, rower).

Initial aerobic exercise intensity is set at 60 % of HR peak and will reach 80 % at the end of the ET protocol.
Adfærdsmæssigt: Exercise training

12-week supervised exercise-training (ET) program consisting of two 60-min and one 120-min exercise sessions per week which focus mainly on aerobic exercises (cycling, treadmill, rower).

Initial aerobic exercise intensity is set at 60 % of HR peak and will reach 80 % at the end of the ET protocol.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Tidsramme
Exercise tolerance (Expiratory flow limitation and Operational Lung Volumes at rest and exercise, cardiorespiratory and subjective responses to incremental exercise)
Tidsramme: Participants will be followed for the duration of exercise training, an expected average of 12 weeks
Participants will be followed for the duration of exercise training, an expected average of 12 weeks

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Polysomnography
Tidsramme: Participants will be followed for the duration of exercise training, an expected average of 12 weeks
Explore the potential existence of obstructive sleep apnea and its effects on cardiovascular adaptations during exercise.
Participants will be followed for the duration of exercise training, an expected average of 12 weeks
Cardiorespiratory fitness (VO2max)
Tidsramme: Participants will be followed for the duration of exercise training, an expected average of 12 weeks
Participants will be followed for the duration of exercise training, an expected average of 12 weeks

Samarbejdspartnere og efterforskere

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

Sponsor

University Hospital, Grenoble

Efterforskere

  • Ledende efterforsker: Bernard WUYAM, Dr, University Hospital, Grenoble
  • Ledende efterforsker: Claudine Perrin, MD, CHU Grenoble, Pediatrics Department

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

1. september 2007

Primær færdiggørelse (Faktiske)

1. marts 2012

Studieafslutning (Faktiske)

1. marts 2012

Datoer for studieregistrering

Først indsendt

29. juli 2011

Først indsendt, der opfyldte QC-kriterier

4. august 2011

Først opslået (Skøn)

8. august 2011

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Skøn)

28. juni 2012

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

26. juni 2012

Sidst verificeret

1. juni 2012

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 0718
  • 2007-A00714-49 (Registry Identifier: ID RCB)

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 .

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Betingelser

Sjældne sygdomme

Narkotikainterventioner

Kosttilskud

Sponsor / samarbejdspartnere

Placeringer

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