Ian Janssen
Datos Biográficos
| ID | 5408646 |
|---|---|
| NOMBRE | Ian Janssen |
| NOMBRES | Ian |
| APELLIDO | Janssen |
| FIRMA | JANSSEN I |
| AFILIACIONES | Queen's University |
| ORCID | 0000-0003-2159-3012 |
| VERIFICADO | Sí |
| TOTAL DE OBRAS | 71 |
| TOTAL DE CITAS | 43 |
| TOTAL COMO AUTOR | 71 |
| TOTAL COMO EDITOR | 0 |
| PRIMER AÑO DE PUBLICACIÓN | 2000 |
| AÑO MÁS RECIENTE DE PUBLICACIÓN | 2025 |
| ÍNDICE H | 4 |
Assessing the damage
Differences in the 24-h movement behaviour composition comparing the cross-sectional samples, although statistically significant, were considered trivial and unlikely to have a substantial practical impact. However, considerable differences were observed in the prospective analysis. The results suggest that most of the observed changes over time were expected as a natural consequence of aging during high school, with only a small portion attribut…
Meeting the 24-hour movement guidelines among adult immigrants in Canada
The 2022 ParticipAction Report Card on Physical Activity for Children and Youth
Introduction The ParticipACTION Report Card on Physical Activity for Children and Youth is the most comprehensive national assessment of physical activity and related behaviors, characteristics, and opportunities for children and youth. The 2022 Report Card assigned grades based on data gathered during the COVID-19 pandemic to reflect this extraordinary time-period in Canada. Further, while not graded, efforts were made to summarize key findings …
The association between social media use and physical activity among Canadian adolescents
The findings of this study suggest that non-active SMU was significantly associated with lower PA levels. Problematic SMU was only significantly associated with lower PA levels in the exercise domain. Intense SMU was associated with higher odds of meeting the PA recommendation
Economic burden of excessive sedentary behaviour in Canada
H Movement Guidelines and Substance Use among Adolescents
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 been associated with substance use among adolescents. However, previous research has mainly examined t…
Do adolescent sedentary behavior levels predict type 2 diabetes risk in adulthood
Spending more than 4 h/day watching television and videos at age 16 was associated with an increased risk of type 2 diabetes. Conversely, using a computer and non-screen based sedentary behaviors were not associated with type 2 diabetes risk
Development of a consensus statement on the role of the family in the physical activity, sedentary, and sleep behaviours of children and youth
Combinations of physical activity, sedentary time, and sleep duration and their associations with depressive symptoms and other mental health problems in children and adolescents
How Are Adolescents Sleeping? Adolescent Sleep Patterns and Sociodemographic Differences in 24 European and North American Countries
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 discussions are lacking. We examined the sleep patterns of adolescents across 24 countries and by gen…
Canadian 24-Hour Movement Guidelines for Adults aged 18–64 years and Adults aged 65 years or older
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 Integration of Physical Activity, Sedentary Behaviour, and Sleep. These guidelines underscore the impo…
Electronic screen technology use and connection to nature in Canadian adolescents
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 among adolescents; (2) explore relationships between these connections and the use of electronic scree…
Sleep in Farm Adolescents
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 from the 2014 Canadian Health Behaviour in School-aged Children study. Records from 2,160 farm ado…
Roaming the Neighbourhood
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 various measures of IM and aimed to address how parental perceptions of the neighbourhood environment …
Move on Bikes Program
This study provides evidence that the MEB program adds an extra 71 min/week of MVPA to more than 20,000 users
Development of a measurement approach to assess time children participate in organized sport, active travel, outdoor active play, and curriculum-based physical activity
This novel measurement approach can be used to estimate the time that children participate in different types of physical activity
Bi-directional association between sleep and outdoor active play among 10–13 year olds
None of the sleep characteristics predicted the following day's outdoor active play. Increase time spent in outdoor active play predicted a longer time in bed, but not sleep duration, sleep chronology, or sleep efficiency
Duration and intensity of different types of physical activity among children aged 10–13 years
Physical activity
OBJECTIVE: To provide a broad overview of the state of physical activity (PA) research in the form of (1) definitions of PA, (2) health benefits, (3) prevalence, (4) correlates and (5) interventions. DESIGN: A high-level overview of published reviews of the literature. RESULTS: Regular PA is an effective primary and secondary preventative strategy against at least 25 chronic medical conditions with risk reduction typically in the 20-30% range. Wh…
Systematic review of the relationships between physical activity and health indicators in the early years (0-4 years)
Health associations with meeting new 24-hour movement guidelines for Canadian children and youth
Canadian 24-Hour Movement Guidelines for the Early Years (0–4 years)
These guidelines represent a sensible evolution of public health guidelines whereby optimal health is framed within the balance of movement behaviours across the whole day, while respecting preferences of end-users. Future research should consider the integrated relationships among movement behaviours, and similar integrated guidelines for other age groups should be developed
Proportion of preschool-aged children meeting the Canadian 24-Hour Movement Guidelines and associations with adiposity
Very few preschool-aged children in Canada (~13%) met all three recommendations contained within the 24-Hour Movement Guidelines. None of the combinations of recommendations were associated with adiposity in this sample. Future work should focus on identifying innovative ways to reduce screen time in this population, and should examine the associations of guideline adherence with health indicators other than adiposity
Systematic review of the relationships between objectively measured physical activity and health indicators in school-aged children and youth
Moderate-to-vigorous physical activity (MVPA) is essential for disease prevention and health promotion. Emerging evidence suggests other intensities of physical activity (PA), including light-intensity activity (LPA), may also be important, but there has been no rigorous evaluation of the evidence. The purpose of this systematic review was to examine the relationships between objectively measured PA (total and all intensities) and health indicato…
Canadian 24-Hour Movement Guidelines for Children and Youth
Leaders from the Canadian Society for Exercise Physiology convened representatives of national organizations, content experts, methodologists, stakeholders, and end-users who followed rigorous and transparent guideline development procedures to create the Canadian 24-Hour Movement Guidelines for Children and Youth: An Integration of Physical Activity, Sedentary Behaviour, and Sleep. These novel guidelines for children and youth aged 5–17 years re…
Multilevel analysis of associations between socioeconomic status and injury among Canadian adolescents
Study objective: To determine the contribution of individual and area level measures of socioeconomic status (SES) to the occurrence of various injury types among Canadian adolescents. Design and setting: Cross sectional Canadian data were used from two sources: (1) the 2001/02 health behaviour in school aged children survey (individual level SES measures, injury measures), and (2) the 2001 Canada census of population (area level SES measures). I…
Active play
Updating the Canadian Obesity Maps
Electronic screen technology use and connection to nature in Canadian adolescents
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 among adolescents; (2) explore relationships between these connections and the use of electronic scree…
Social disorder, physical activity and adiposity in Mexican adults
The food retail environment in school neighborhoods and its relation to lunchtime eating behaviors in youth from three countries
This study examined the relation between the chain food retail environment surrounding schools, youths' lunchtime eating behavior, and youths' obesity levels across three countries. Participants consisted of 26,778 students 13-15 years old from 687 schools across Canada, Scotland and the US. The density of convenience stores, chain fast food restaurants, and chain cafés within 1 km of each school was measured. Lunchtime eating behaviors, weight, …
Walkable school neighborhoods are not playable neighborhoods
The objectives were to determine whether: (1) playability features differed across walkable and non-walkable school neighborhoods, and (2) physical activity differed in children living in walkable and non-walkable school neighborhoods. A total of 3912 grade 6-8 students from 132 school neighborhoods were studied. There was more developed park space in high walkability neighborhoods than low walkability neighborhoods. Other playability features we…
Density and type of food retailers surrounding Canadian schools
Meeting the 24-hour movement guidelines among adult immigrants in Canada
The association between social media use and physical activity among Canadian adolescents
The findings of this study suggest that non-active SMU was significantly associated with lower PA levels. Problematic SMU was only significantly associated with lower PA levels in the exercise domain. Intense SMU was associated with higher odds of meeting the PA recommendation
Economic burden of excessive sedentary behaviour in Canada
Duration and intensity of different types of physical activity among children aged 10–13 years
Correlates of physical activity in First Nations youth residing in First Nations and northern communities in Canada
Correlates of physical activity among First Nations children residing in First Nations communities in Canada
Skeletal muscle mass and distribution in 468 men and women aged 18–88 yr
We employed a whole body magnetic resonance imaging protocol to examine the influence of age, gender, body weight, and height on skeletal muscle (SM) mass and distribution in a large and heterogeneous sample of 468 men and women. Men had significantly ( P
The Economic Costs Associated With Physical Inactivity and Obesity in Canada
The purpose of this analytical review was to estimate the direct and indirect economic costs of physical inactivity and obesity in Canada in 2001. The relative risks of diseases associated with physical inactivity and obesity were determined from a meta-analysis of existing prospective studies and applied to the health care costs of these diseases in Canada. Estimates were derived for both the direct health care expenditures and the indirect cost…
Associations Between Overweight and Obesity With Bullying Behaviors in School-Aged Children
Objective. The prevalence of overweight and obesity in children is rising. Childhood obesity is associated with many negative social and psychological ramifications such as peer aggression. However, the relationship between overweight and obesity status with different forms of bullying behaviors remains unclear. The purpose of this article is to examine these relationships. Methods. We examined associations between bullying behaviors (physical, v…
Waist circumference and not body mass index explains obesity-related health risk
Comparison of overweight and obesity prevalence in school‐aged youth from 34 countries and their relationships with physical activity and dietary patterns
The purposes of this systematic review were to present and compare recent estimates of the prevalence of overweight and obesity in school‐aged youth from 34 countries and to examine associations between overweight and selected dietary and physical activity patterns. Data consisted of a cross‐sectional survey of 137 593 youth (10–16 years) from the 34 (primarily European) participating countries of the 2001–2002 Health Behaviour in School‐Aged Chi…
Multilevel analysis of associations between socioeconomic status and injury among Canadian adolescents
Study objective: To determine the contribution of individual and area level measures of socioeconomic status (SES) to the occurrence of various injury types among Canadian adolescents. Design and setting: Cross sectional Canadian data were used from two sources: (1) the 2001/02 health behaviour in school aged children survey (individual level SES measures, injury measures), and (2) the 2001 Canada census of population (area level SES measures). I…
Influence of individual- and area-level measures of socioeconomic status on obesity, unhealthy eating, and physical inactivity in Canadian adolescents
Density and type of food retailers surrounding Canadian schools
Association between the food retail environment surrounding schools and overweight in Canadian youth
Introduction There is growing interest in how the physical environment influences obesity. Few studies have considered how the food retail environment surrounding schools influences overweight in students. Objective To determine whether there is a relationship between food retailers surrounding schools and overweight among Canadian youth. Design Cross-sectional study. Setting/methods/subjects The number of food retailers was obtained within a 1 k…
Systematic review of the health benefits of physical activity and fitness in school-aged children and youth
Association Between Muscle Mass, Leg Strength, and Fat Mass With Physical Function in Older Adults
Leg strength and fat mass best predict physical function in older adults and the relative importance varies according to age and sex
Canadian Sedentary Behaviour Guidelines for Children and Youth
The Canadian Society for Exercise Physiology (CSEP), in partnership with the Healthy Active Living and Obesity Research Group (HALO) at the Children’s Hospital of Eastern Ontario Research Institute, and in collaboration with ParticipACTION, and others, has developed the Canadian Sedentary Behaviour Guidelines for Children (aged 5–11 years) and Youth (aged 12–17 years). The guidelines include a preamble to provide context, followed by the specific…
New Canadian Physical Activity Guidelines
The Canadian Society for Exercise Physiology (CSEP), in cooperation with ParticipACTION and other stakeholders, and with support from the Public Health Agency of Canada (PHAC), has developed the new Canadian Physical Activity Guidelines for Children (aged 5–11 years), Youth (aged 12–17 years), Adults (aged 18–64 years), and Older Adults (aged ≥65 years). The new guidelines include a preamble to provide context and specific guidelines for each age…
Street Connectivity is Negatively Associated with Physical Activity in Canadian Youth
Street connectivity, defined as how well streets connect to one and other and the density of intersections, is positively associated with active transportation in adults. Our objective was to study the relation between street connectivity and physical activity in youth. Study participants consisted of 8,535 students in grades 6-10 from 180 schools across Canada who completed the 2006 Health Behaviour in School-aged Children (HBSC) survey. Street …
Volume, patterns, and types of sedentary behavior and cardio-metabolic health in children and adolescents
No association was observed between overall volume and patterns of sedentary behavior with cardio-metabolic risk factors in this large sample of children and adolescents. Conversely, high TV use and low MVPA were independently associated with cardio-metabolic risk factors. However, the association between high TV use and clustered cardio-metabolic risk factors appears to be mediated or confounded by obesity. Thus, TV and MVPA appear to be two sep…
Urban and rural differences in sedentary behavior among American and Canadian youth
Active Transportation Environments Surrounding Canadian Schools
Systematic review of physical activity and health in the early years (aged 0–4 years)
The early years represent a critical period for promoting physical activity. However, the amount of physical activity needed for healthy growth and development is not clear. Using the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) framework, we aimed to present the best available evidence to determine the relationship between physical activity and measures of adiposity, bone and skeletal health, motor skill development…
Field Validation of Food Service Listings
Many studies examining the food retail environment rely on geographic information system (GIS) databases for location information. The purpose of this study was to validate information provided by two GIS databases, comparing the positional accuracy of food service places within a 1 km circular buffer surrounding 34 schools in Ontario, Canada. A commercial database (InfoCanada) and an online database (Yellow Pages) provided the addresses of food …
Identification of the Appropriate Boundary Size to Use When Measuring the Food Retail Environment Surrounding Schools
This study included 6,971 students in grades 9 and 10 (ages 13 to 16 years) from 158 schools who participated in the 2009/2010 Health Behaviour in School-aged Children Study. Students provided information on where they typically ate lunch. The number of food retailers was obtained for six road network buffer sizes (500, 750, 1,000, 1,500, 2,000, and 5,000 meters) surrounding schools. Associations between the presence of food retailers near school…
Associations between factors within the home setting and screen time among children aged 0–5 years
A large proportion of screen time in pre-school children was explained by factors within the home setting. Parental cognitive factors at the interpersonal level were of particular relevance. These findings suggest that interventions aiming to foster appropriate screen time habits in pre-school children may be most effective if they target parents for behavioral change
The food retail environment in school neighborhoods and its relation to lunchtime eating behaviors in youth from three countries
This study examined the relation between the chain food retail environment surrounding schools, youths' lunchtime eating behavior, and youths' obesity levels across three countries. Participants consisted of 26,778 students 13-15 years old from 687 schools across Canada, Scotland and the US. The density of convenience stores, chain fast food restaurants, and chain cafés within 1 km of each school was measured. Lunchtime eating behaviors, weight, …
Active Transportation Safety Features around Schools in Canada
The purpose of this study was to describe the presence and quality of active transportation safety features in Canadian school environments that relate to pedestrian and bicycle safety. Variations in these features and associated traffic concerns as perceived by school administrators were examined by geographic status and school type. The study was based on schools that participated in 2009/2010 Health Behaviour in School-aged Children (HBSC) sur…
The association between accelerometer-measured patterns of sedentary time and health risk in children and youth
The findings confirm results of other studies that reported accelerometer-measured sedentary time was not associated with health risk in children and youth. Even when the pattern and timing of sedentary time was examined relative to health markers, few associations emerged and were limited to boys aged 11-14 years
Physical inactivity prevalence and trends among Mexican adults
The proportion of the Mexican adult population who do not meet the minimum WHO physical activity criteria has increased by 6% points between 2006 and 2012. Given the increasing prevalence of obesity, the aging of the population, and the shift in socioeconomic status in Mexico, physical inactivity could continue to increase in the coming years unless effective public health interventions are implemented
Medicine (58 obras) · Obesity, Physical Activity, Diet (43 obras) · Demography (35 obras) · Physical Activity and Health (31 obras) · Psychology (31 obras) · Physical activity (30 obras) · Environmental health (28 obras) · Physical therapy (28 obras) · Demography (26 obras) · Gerontology (22 obras)