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Objective: In recognition that engagement in physical activities for persons living with dementia can be challenging in rural and northern communities, the objective of this study was to explore the factors influencing physical activity participation among persons living with dementia in rural/northern communities and to identify the locally-driven mitigation strategies participants used to address barriers to physical activity., Setting: Interviews and focus groups were conducted in two locations in northern British Columbia, Canada including a rural community (<10 000 persons) and a medium-sized geographically isolated city (<80 000 persons). Both communities are located at substantial distances (>700 km) from larger urban centres., Participants: Twenty-nine individuals participated including healthcare providers (n=8), community exercise professionals (n=12), persons living with dementia (n=4) and care partners (n=5)., Results: Rural and northern contextual factors including aspects of the built and natural environment were the main drivers of physical activity for persons living with dementia. Limited capacity in the health system to support physical activity due to a lack of referrals, poor communication mechanisms and limited resources for programming created challenges for physical activity participation. At the community level, local champions filled gaps in physical activity programming by leveraging informal networks to organise opportunities. Programme-level factors included a lack of consistency in staff, and challenges defining programme scope given limited population size and the fear of stigma for persons living with dementia., Conclusions: Environmental context and limited access to specialised programming affect the opportunities for persons living with dementia to engage in physical activities. Rural and northern communities showed resiliency in providing physical activity opportunities yet remained fragile due to human resource challenges. Without reliable resources and sustained support from the health system, local champions remain vulnerable to burnout. Enhancing support for local champions may provide greater stability and support to physical activity promotion in rural and northern communities., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)

Objectives: The increase in global wildland fire activity has accelerated the urgency to understand health risks associated with wildland fire suppression. The aim of this project was to identify occupational health research priorities for wildland firefighters and related personnel., Design: In order to identify, rank and rate health research priorities, we followed a modified Delphi approach. Data collection involved a two-stage online survey followed by semi-structured interviews., Setting: British Columbia, Canada., Participants: Participants included any current or past wildland firefighter or individuals engaged in related roles. There were 132 respondents to the first survey. Responses to the first survey were analysed to produce 10 research topics which were ranked by 75 participants in the second survey (response rate: 84%)., Primary and Secondary Outcome Measures: The primary outcome was the identification, ranking and level of agreement of research priorities through a two-round online survey. We contextualised these findings through deductive and inductive qualitative content analysis of semi-structured interviews., Results: The most important research priorities identified were (% consensus): effects of smoke inhalation on respiratory health (89%), fatigue and sleep (80%), mental health (78%), stress (76%) and long-term risk of disease (67%). Interviews were completed with 14 individuals. Two main themes were developed from an inductive content analysis of interview transcripts: (1) understanding the dynamic risk environment; and (2) organisational fit of mitigation strategies., Conclusions: Participants expressed a general concern with the unknown mental and physical health impacts of their jobs, including the long-term risk of morbidity and mortality. Future research must address knowledge gaps in our understanding of the health impacts of wildland fire and work to develop appropriate mitigation strategies while considering the needs of workers and unpredictable workplace environment., Trial Registration Number: Open Science Framework, https://osf.io/ugz4s/., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)

Introduction: Little is known regarding associations between potentially modifiable lifestyle habits and early markers of cardiovascular disease (CVD) in pediatric type 1 diabetes (T1D), hindering early prevention efforts. Specific objectives are: (1) compare established risk factors (dyslipidemia, hypertension) with novel early markers for CVD (cardiac phenotype, aortic distensibility, endothelial function) in adolescents with T1D and healthy age-matched and sex-matched controls; (2) examine associations between these novel early markers with: (i) lifestyle habits; (ii) adipokines and measures of inflammation; and (iii) markers of oxidative stress among adolescents with T1D and controls, and determine group differences in these associations; (3) explore, across both groups, associations between CVD markers and residential neighbourhood features., Methods and Analyses: Using a cross-sectional design, we will compare 100 participants aged 14-18 years with T1D to 100 healthy controls. Measures include: anthropometrics; stage of sexual maturity (Tanner stages); physical activity (7-day accelerometry); sleep and sedentary behaviour (self-report and accelerometry); fitness (peak oxygen consumption); and dietary intake (three non-consecutive 24- hour dietary recalls). Repeated measures of blood pressure will be obtained. Lipid profiles will be determined after a 12- hour fast. Cardiac structure/function: non-contrast cardiac magnetic resonance imaging (CMR) images will evaluate volume, mass, systolic and diastolic function and myocardial fibrosis. Aortic distensibility will be determined by pulse wave velocity with elasticity and resistance studies at the central aorta. Endothelial function will be determined by flow-mediated dilation. Inflammatory markers include plasma leptin, adiponectin, tumour necrosis factor alpha (TNF-α), type I and type II TNF-α soluble receptors and interleukin-6 concentrations. Measures of endogenous antioxidants include manganese superoxide dismutase, glutathione peroxidase and glutathione in blood. Neighbourhood features include built and social environment indicators and air quality., Ethics and Dissemination: This study was approved by the Sainte-Justine Hospital Research Ethics Board. Written informed assent and consent will be obtained from participants and their parents., Trial Registration Number: NCT04304729., Competing Interests: Competing interests: MH was funded by a Canadian Society for Endocrinology and Metabolism/Astra-Zeneca Diabetes Junior Investigator Award, and is the recipient of the 2019 Canadian Society for Endocrinology and Metabolism Young Investigator Award. MF is board member, shareholder and advisor of Circle Cardiovascular Imaging Inc., (© Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)