Ian Janssen

Ian Janssen
Queen's University | QueensU · School of Kinesiology and Health Studies

PhD

About

463
Publications
229,872
Reads
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50,760
Citations
Additional affiliations
July 2004 - present
Queen's University
Position
  • Professor (Full)
January 2003 - June 2004
Queen's University
Position
  • PostDoc Position
January 2002 - December 2002
Tufts University
Position
  • PostDoc Position
Education
May 1998 - December 2001
Queen's University
Field of study
  • Exercise Sciences
September 1996 - April 1998
Queen's University
Field of study
  • Exercise Sciences
September 1992 - April 1996
Laurentian University
Field of study
  • Physical and Health Education

Publications

Publications (463)
Article
Objective To provide estimates of the health care and productivity costs associated with insufficient sleep duration (<7 hours per night) in Canadian adults. Methods A prevalence-based approach was used to estimate the economic costs associated with insufficient sleep duration. Estimates relied on 3 pieces of information: (1) the relative risks of...
Article
Introduction Selon certaines études récentes, les bienfaits de l’activité physique pour la santé diffèrent selon que l’activité est pratiquée le matin, l’après-midi ou le soir. Le but de cette revue systématique était de déterminer s’il existe un lien entre, d’une part, le moment choisi pour faire de l’activité physique sur 24 heures et, d’autre pa...
Article
Introduction L’objectif de cette étude était d’effectuer une revue systématique des relations entre, d’une part, l’horaire des comportements sédentaires et l’accès à des activités sédentaires dans la chambre et, d’autre part, la durée et la qualité du sommeil chez les enfants et les adolescents. Un objectif secondaire consistait à vérifier si ces r...
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Background Recent studies report that the health benefits of physical activity differ depending on whether the activity is performed in the morning, afternoon or evening. The purpose of this systematic review was to examine whether the timing of physical activity within the 24-hour day is associated with health. Methods Five databases were searche...
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Introduction To continue to inform sleep health guidelines and the development of evidence-based healthy sleep interventions for children and adolescents, it is important to better understand the associations between sleep timing (bedtime, wake-up time, midpoint of sleep) and various health indicators. The objective of this systematic review was to...
Article
Introduction Pour continuer à éclairer les lignes directrices sur la santé concernant le sommeil ainsi qu’à favoriser l’élaboration d’interventions fondées sur des données probantes en faveur d’un sommeil sain chez les enfants et les adolescents, il est important de mieux comprendre les associations entre l’horaire de sommeil (heure du coucher, heu...
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Background The purpose of this study was to systematically review the relationship between the timing of sedentary behaviours and access to sedentary activities in the bedroom with sleep duration and quality in children and youth. A secondary purpose was to examine whether these relationships differ when comparing screen-based and non-screen-based...
Article
Introduction Increased screen time is a ubiquitous part of adolescent life and is adversely associated with their well-being. However, it remains unclear whether different types of screen time have equivalent associations, or if relationships are dose-dependent. Methods The data were from 2 nationally representative Health Behaviour in School-aged...
Article
Background: This study examined associations between sociodemographic factors and meeting versus not meeting the new Canadian 24-Hour Movement Guidelines recommendations. Methods: The study is based on 7651 respondents aged 18-79 years from the 2007 to 2013 Canadian Health Measures Survey, a nationally representative, cross-sectional survey. Soc...
Article
The time spent in sleep, sedentary behavior, and physical activity form a 24-hour movement behavior composition. The objective was to identify neighborhood physical environment features associated with multiple components of the movement behavior composition among 10 to 13-year-olds. Twenty-three neighborhood physical environment features were meas...
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Background: The Canadian 24-Hour Movement Guidelines for Adults (18-64 years and 65 years or older) were launched in October 2020 and provide evidence-based recommendations for physical activity, sedentary behaviour and sleep. The purpose of this study was to examine whether meeting the 24-Hour Movement Guidelines overall, and different combinatio...
Article
This study determined if meeting the Canadian 24-Hour Movement Guidelines recommendations are associated with all-cause mortality. Participants were 3471 adults from the 2005–2006 U.S. National Health and Nutrition Examination Survey followed for mortality over 11 years. They were classified as meeting or not meeting recommendations for sleep durat...
Article
Introduction This study examined longitudinal associations between e-cigarette use, cigarette smoking, physical activity, and recreational screen time (ST) in a cohort of Canadian adolescents (ages 14-17 years; grades 9-12). Methods Data from 5,951 adolescents who participated in COMPASS Year 4 (2015–16; baseline) and Year 6 (2017–18; follow-up) w...
Article
Background: The fitness levels of Canadian adults declined substantially between 1981 and the years 2007 to 2009, suggesting a reduction in population health. This paper updates the fitness trends of Canadians aged 20 to 69 years by extending the time period to 2017. Data and methods: The Canadian Health Measures Survey is a repeated cross-secti...
Presentation
Full-text available
Introduction The enhancement of data systems and capabilities at national levels to support regular population surveillance of physical activity (PA) was identified as a priority in the World Health Organization Global Action Plan on Physical Activity 2018–2030. The aims of this project were to: (i) review, compare, and discuss the methodological i...
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Background Research examining the associations between movement behaviours and mental health indicators within a compositional framework are sparse and limited by their cross-sectional study design. This study has three objectives. First, to describe the change in movement behaviour composition over time. Second, to explore the association between...
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Background One of the strategic actions identified in the Global Action Plan on Physical Activity (PA) 2018–2030 is the enhancement of data systems and capabilities at national levels to support regular population surveillance of PA. Although national and international standardized surveillance of PA among children and adolescents has increased in...
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Background The objective was to determine whether time spent in different types of sedentary behavior during adolescence are associated with the risk of developing type 2 diabetes in adulthood. Methods Participants were 3942 adolescents aged 16 years who were part of the 1970 British Cohort Study. Sedentary behavior was assessed using a questionna...
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Children and youth are recommended to achieve at least 60 min/day of moderate-to-vigorous physical activity, no more than 2 h/day of recreational screen time, and a sleep duration of 9–11 h/night for 11–13-year-olds or 8–10 h/night for 14–17-year-olds. Meeting the physical activity, screen time, and sleep duration recommendations have previously be...
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Background: Due to the myriad of benefits of children’s outdoor play and time, there is increasing concern over its decline. This systematic review synthesized evidence on the correlates of outdoor play and outdoor time among children aged 3-12 years. Methods: A total of 12 electronic databases in five different languages (Chinese, English, Korean...
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Background Daily time spent in sleep, sedentary behaviour (SED), light intensity physical activity (LIPA), and moderate-to-vigorous intensity physical activity (MVPA) are compositional, co-dependent variables. The objectives of this study were to use compositional data analysis to: (1) examine the relationship between the movement behaviour composi...
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Background: Physical fitness is an important indicator of current and future health status. This analysis examines the relationships among child-parent dyads in physical fitness measures. Data and methods: The analysis is based on biological child-parent dyads from three cycles of the Canadian Health Measures Survey (Cycle 1: 2007 to 2009, Cycle...
Article
Objective The Canadian 24-Hour Movement Guidelines for Children and Youth recommend at least 60 minutes of physical activity per day, 2 hours or less of recreational screen time per day, and 9 to 11 hours of sleep per night for 5 to 13 years old and 8 to 10 hours per night for 14 to 17 years old. This study examined the association between meeting...
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The Canadian Society for Exercise Physiology assembled a Consensus Panel representing national organizations, content experts, methodologists, stakeholders, and end-users and followed an established guideline development procedure to create the Canadian 24-Hour Movement Guidelines for Adults aged 18-64 years and Adults aged 65 years or older: An In...
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The purpose of this overview of systematic reviews was to determine the relationship between different types and patterns of sedentary behaviour and selected health outcomes in adults and older adults. Five electronic databases were last searched in May, 2019, with a 10-year search limit. Included reviews met the a priori population (community-dwel...
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The objective of this overview of systematic reviews was to determine the benefits and harms of resistance training (RT) on health outcomes in adults aged 18 years or older, compared with not participating in RT. Four electronic databases were searched in February 2019 for systematic reviews published in the past 10 years. Eligibility criteria were...
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This overview of systematic reviews examined the effect of balance and functional strength training on health outcomes in adults aged 18 years or older, to inform the Canadian 24-hour Movement Guidelines. Four electronic databases were searched for systematic reviews published between January 2009 and May 2019. Eligibility criteria were determined...
Article
Background The Canadian 24-Hour Movement Guidelines for Children and Youth recommend ≥60 min of physical activity per day, ≤2 h of recreational screen time per day, and 9−11 hours of sleep per night for 11–13 years old and 8−10 hours per night for 14–17 years old. Objective This study examined the association between combinations of these recommen...
Article
Purpose The Canadian 24-Hour Movement Guidelines for Children and Youth (≥60 minutes of moderate-to-vigorous physical activity per day, ≤2 hours of recreational screen time per day, and 9–11 hours of sleep per night for 5–13 years old) are associated with better physical health, but less is known about how these behaviors are related to mental heal...
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The objective of this overview of systematic reviews was to examine the associations between sleep duration and health outcomes in adults. Four electronic databases were searched in December 2018 for systematic reviews published in the previous 10 years. Included reviews met the a priori determined population (community-dwelling adults aged 18 year...
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This systematic review determined if the composition of time spent in movement behaviours (i.e., sleep, sedentary behaviour (SED), light physical activity, and moderate-to-vigorous physical activity (MVPA)) is associated with health in adults. Five electronic databases were searched in August 2019. Studies were eligible for inclusion if they were p...
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The objective of this systematic review was to examine the associations between sleep timing (e.g., bedtime/wake-up time, midpoint of sleep), sleep consistency/regularity (e.g., intra-individual variability in sleep duration, social jetlag, catch-up sleep), and health outcomes in adults aged 18 years and older. Four electronic databases were search...
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There are gaps in current guidance concerning how to conduct overviews of systematic reviews in an outcome-centric manner. Herein we summarize the methods and lessons learned from conducting 4 outcome-centric overviews to help inform the Canadian 24-Hour Movement Guidelines for Adults aged 18–64 years and Adults aged 65 years or older on the topics...
Presentation
Full-text available
Objective To present findings from the available global surveillance systems of physical activity (PA) for children and youth (0-17 year-old), and to highlight research gaps and needs for their improvement. Methods Narrative review of the international surveillance systems, studies, and global initiatives collecting or compiling evidence on the PA...
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Obesity is a prevalent, complex, progressive and relapsing chronic disease, characterized by abnormal or excessive body fat (adiposity), that impairs health. People living with obesity face substantial bias and stigma, which contribute to increased morbidity and mortality independent of weight or body mass index. This guideline update reflects su...
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KEY POINTS • Obesity is a prevalent, complex, progressive and relapsing chronic disease, characterized by abnormal or excessive body fat (adiposity), that impairs health. • People living with obesity face substantial bias and stigma, which contribute to increased morbidity and mortality independent of weight or body mass index. • This guideline upd...
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Background: Physical inactivity (PI) is associated with the development of non-communicable chronic diseases. The purposes of this study were to estimate the extent to which the 31% relative increase in PI among 35-64 years old Mexicans between 2006 and 2012 influenced diabetes (T2D) and cardiovascular disease (CVD) incidence and mortality, and to...
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Background: Children and youth who meet the physical activity, sedentary, and sleep behaviour recommendations in the Canadian 24-Hour Movement Guidelines are more likely to have desirable physical and psychosocial health outcomes. Yet, few children and youth actually meet the recommendations. The family is a key source of influence that can affect...
Article
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Background: For optimal health benefits, the Canadian 24-Hour Movement Guidelines for Children and Youth (aged 5-17 years) recommend an achievement of high levels of physical activity (≥60 min of moderate-to-vigorous physical activity), low levels of sedentary behaviour (≤2 h of recreational screen time), and sufficient sleep (9-11 h for children...
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There has been increasing recognition of the importance of children's outdoor play and independent mobility for thriving children, neighbourhoods, cities and society, which has led to calls to reverse children's retreat from the street commonplace in many Western nations. We privilege the voices of children aged 10–13 living in three diverse neighb...
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Purpose Insufficient and poor sleep patterns are common among adolescents worldwide. Up to now, the evidence on adolescent sleep has been mostly informed by country-specific studies that used different measures and age groups, making direct comparisons difficult. Cross-national data on adolescent sleep that could inform nations and international di...
Article
Background The 24-hour movement guidelines for children and youth recommend ≥60 min/day of moderate-to-vigorous physical activity, ≤2 h/day of screen time, 9-11 h/night of sleep for 11-13 years and 8-10 h/night for 14-17 years. The objectives of this study were to examine the associations between meeting combinations of the recommendations containe...
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Objectives: Declines in exposure to nature may deprive young people of experiences that are positive for their mental health. One factor that may interfere with connections to nature is use of electronic screen technologies. The objectives of this study are to (1) document variations in the perceived importance of connections to nature nationally...
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Background: The objective of this study was to investigate the relationship between engagement in multiple risk behaviours (MRB) and concussion amongst youth. Methods: This was a cross-sectional study that used survey data collected from 3059 students in grades 6-10 (approximate ages 11-15 years) from Ontario, Canada. Students reported whether o...
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Background: Physical fitness during childhood is an important indicator of current and future health. This paper provides an overview of the fitness of Canadian children and youth aged 6 to 19 years. Data and methods: Data are from three cycles of the Canadian Health Measures Survey (CHMS) spanning a 10-year period: 2007 to 2009 (n = 2,081), 200...
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Children’s independent mobility (IM), their freedom to move about their neighbourhood without supervision by adults, has been in steady decline in recent decades. Previous research has linked perceptions of the environment with various measures of IM, but recently concerns have been raised regarding inconsistency in measuring IM. This study used va...
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Background: Surveillance of physical activity among Canadian adults has typically relied on questionnaire-based data, which have many limitations. The Canadian Health Measures Survey (CHMS) has been collecting objective, accelerometer-based physical activity data on a nationally representative sample of Canadian adults since 2007. Data and method...
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Purpose The purpose of this study was to determine which intensities, patterns, and types of 24-h movement behaviors are most strongly associated with cardiometabolic risk factors among children. Methods A total of 369 children aged 10–13 years were studied. Participants wore an Actical accelerometer and a Garmin Forerunner 220 GPS logger and comp...
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Open streets programs are free and multisectoral programs in which streets are temporally closed allowing access to walkers, runners, rollerbladers, and cyclists. The Move on Bikes program (by its name in Spanish Muévete en Bici) (MEB) consists of 55 km of interconnected streets in middle-high income areas of Mexico City. There is scarce evidence o...
Article
Aim To: (1) explore how young people with epilepsy spend time on physical activity, screen‐time, and sleep in a 24‐hour period; (2) compare these findings to young people without epilepsy; and (3) evaluate the findings relative to the Canadian 24‐hour movement guidelines for children and youth. Method The study is based on Canadian data from the 2...
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Background A limitation of measuring sedentary time with an accelerometer is device removal. The resulting nonwear time is typically deleted from the data prior to calculating sedentary time. This could impact estimates of sedentary time and its associations with health indicators. We evaluated whether using multiple imputation to replace nonwear a...
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Altering the proportion of total physical activity time accumulated while participating in different types of physical activity may influence health. Our objective was to use observational data to estimate whether replacing time from 1 type of physical activity with another is associated with physical and mental health indicators among children. Pa...
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Objectives To use a predominately objective measurement approach to assess and describe: (1) the amount of time that children aged 10–13 years spend participating in outdoor active play, active travel, curriculum-based physical activity at school, and organized sport; (2) the movement intensity composition of these four types of physical activity (...
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This study examined the temporal relationship between objective measures of neighborhood crime and active transportation among children. A sample of 387 children aged 10–13 years from Kingston, Canada were studied between January 2015 and December 2016. Active transportation was measured over 7 days using Geographic Information System loggers. The...
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Purpose The objectives were to: (1) describe sleep timing and patterns among adolescents who live or work on farms; (2) compare these sleep characteristics to those of nonfarm adolescents; (3) explore whether the above sleep and farm versus nonfarm differences varied by age and gender. Methods Participants were aged 11‐16 years and were abstracted...
Article
Objective: . Ankle sprains are common injuries that may lead to long-term morbidity. Individuals with obesity are at increased risk for ankle sprains; however, prognostic associations between body mass index (BMI) and recovery are less well understood. This study investigated whether BMI status affects recovery from ankle sprains. Methods: . We...
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Background/objectives: The 24 h day is made up of four movement behaviors: sleep, sedentary behavior (SB), light intensity physical activity (LIPA), and moderate-to-vigorous physical activity (MVPA). Previous studies examining associations between movement behaviors and obesity have used flawed statistical methods that did not account for the co-d...
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Purpose: Studies have found that an early school start time is detrimental to the sleep, health, and well-being of youth, but its association with body weight remains unclear. We examined this association in Canadian adolescents. Methods: We collected information on start times from 362 schools that participated in the 2013/2014 Canadian Health...
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This cross-sectional study examined the independent and interactive associations between objective and perceived measures of neighborhood pedestrian traffic safety and outdoor active play. A total of 458 children aged 10–13 years from Kingston, Canada were studied in 2015–2016. Outdoor active play was measured over 7 days using data from activity l...
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Exposures to outdoor environments have great potential to be protective factors for the mental health of young people. In a national analysis of Canadian adolescents, we explored how such exposures, as well as self-perceptions of connectedness with nature, each related to the prevalence of recurrent psychosomatic symptoms. The data source for this...