Cycling, Air Pollution and Health (CAPaH)
Introduction: Cycling is currently promoted at the municipal, provincial and national level as a form of active transportation that increases physical activity while at the same time reducing traffic congestion, traffic-related air pollution and greenhouse gas emissions. While at a population level the health benefits of exercise via cycling are estimated to substantially exceed any health impacts related to air pollution exposure and injuries from traffic accidents , cyclists are known to experience elevated exposures to traffic-related air pollutants. Combined with exposure to elevated concentrations of air pollutants, cyclists also are subject to substantially increased inhaled doses due to their level of exertion and consequently increased inhalation rate. Therefore, given that cyclists experience exposures to relatively high concentrations of traffic-related air pollutants and that their inhalation of these pollutants is increased, it is important to evaluate the potential health impacts of this scenario. Research on the potential health impacts related to exercise (cycling) and urban air pollution exposure can help inform public communication strategies related to air quality and its health impacts. In addition, as our previous work suggests substantial variability in air pollution exposures to cyclists that is related to the route type and the levels of traffic along cycling routes, there is potential for transportation planners to promote increased cycling by enhancing infrastructure while at the same time developing routes that also minimize exposure to air pollution. The cyclist population is also interested in information regarding the air pollution exposures and potential health impacts related to cycling.
The objective of this study is to investigate the relationship between traffic-related air pollution exposure, and respiratory and cardiovascular health impacts in commuting cyclists. Specifically, the investigators propose to:
- determine commuting cyclists' exposure to traffic-related air pollutants (PM 2.5, PM10, ultrafine particulate, black carbon) while cycling along two different bicycle routes in the city of Vancouver;
- estimate the pollutant dose received by each cyclist, and relate this to the health effects observed; and
- determine if there is a change in lung function, endothelial function, and C-reactive protein level related to the level of air pollution exposure and dose
Panoramica dello studio
Stato
Intervento / Trattamento
Tipo di studio
Iscrizione (Effettivo)
Fase
- Non applicabile
Contatti e Sedi
Luoghi di studio
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British Columbia
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Vancouver, British Columbia, Canada, V6T 1Z3
- Air Pollution Exposure Lab, Vancouver General Hospital through the School of Population and Public Health, University of British Columbia
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Criteri di partecipazione
Criteri di ammissibilità
Età idonea allo studio
Accetta volontari sani
Sessi ammissibili allo studio
Descrizione
Inclusion Criteria:
- Age 19- 39
- male or female
- able to bicycle comfortably on city streets for 1 hour
Exclusion Criteria:
- Smokers of any substance (smoking more than 1x every 2 weeks)
- Must be of height to safely ride a test bike (<5'2", >6'5" )
- Diagnosed asthma or active allergy (hav fever) symptoms
- Irregular menstrual cycle, pregnant, breastfeeding, non-monocyclic contraceptive medication or device
- Taking medication for heart or lung condition
- Answers yes to any questions on physical activity readiness questionnaire (PAR-Q)
- requires pain medication daily
- visual or hearing impairment that prevents safe cycling on streets with motor vehicles
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Prevenzione
- Assegnazione: Randomizzato
- Modello interventistico: Assegnazione incrociata
- Mascheramento: Nessuno (etichetta aperta)
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
|---|---|
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Sperimentale: Normal cycling
Cycling on a residential and downtown route (crossover design)
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Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Lasso di tempo |
|---|---|
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Change in endothelial function, as measured by peripheral arterial tonometry (EndoPAT) score of reactive hyperemia index (RHI)
Lasso di tempo: Baseline (1 hour pre-expousre) and 1 hour post- exposure (plus or minus 30 minutes) to a bicycle ride in an urban environment outdoors
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Baseline (1 hour pre-expousre) and 1 hour post- exposure (plus or minus 30 minutes) to a bicycle ride in an urban environment outdoors
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Misure di risultato secondarie
Misura del risultato |
Lasso di tempo |
|---|---|
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Change in lung function (using spirometry to assess lung function values)
Lasso di tempo: Baseline (1 hour pre-exposure) and 1 hour post- exposure (plus or minus 30 minutes) to a bicycle ride in an urban environment outdoors
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Baseline (1 hour pre-exposure) and 1 hour post- exposure (plus or minus 30 minutes) to a bicycle ride in an urban environment outdoors
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Altre misure di risultato
Misura del risultato |
Lasso di tempo |
|---|---|
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Change in blood levels of C-reactive protein (a marker of systemic inflammation)
Lasso di tempo: Baseline (1 hour pre-exposure) and 1 hour post- exposure (plus or minus 30 minutes) to a bicycle ride in an urban environment outdoors
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Baseline (1 hour pre-exposure) and 1 hour post- exposure (plus or minus 30 minutes) to a bicycle ride in an urban environment outdoors
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Change in blood levels of Interleukin-6 (a marker of systemic inflammation)
Lasso di tempo: Baseline (1 hour pre-exposure) and 1 hour post- exposure (plus or minus 30 minutes) to a bicycle ride in an urban environment outdoors
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Baseline (1 hour pre-exposure) and 1 hour post- exposure (plus or minus 30 minutes) to a bicycle ride in an urban environment outdoors
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Change in blood levels of 8-hydroxy-2'-deoxyguanosine (8-OHdG)(a marker of oxidative stress)
Lasso di tempo: Baseline (1 hour pre-exposure) and 1 hour post- exposure (plus or minus 30 minutes) to a bicycle ride in an urban environment outdoors
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Baseline (1 hour pre-exposure) and 1 hour post- exposure (plus or minus 30 minutes) to a bicycle ride in an urban environment outdoors
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Collaboratori e investigatori
Sponsor
Investigatori
- Investigatore principale: Michael Brauer, ScD, The University of British Columbia
Pubblicazioni e link utili
Studiare le date dei record
Studia le date principali
Inizio studio
Completamento primario (Effettivo)
Completamento dello studio (Effettivo)
Date di iscrizione allo studio
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Stima)
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Stima)
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Altri numeri di identificazione dello studio
- H10-00902
- H1008-111481/001/XSB (Altro identificatore: UBC CREB)
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 .