His primary areas of study are Gerontology, Internal medicine, Obesity, Body mass index and Endocrinology. His Gerontology research includes themes of Physical fitness, Longitudinal study, Relative risk and Public health, Health indicator. His Internal medicine study frequently links to other fields, such as Diabetes mellitus.
His Obesity study combines topics in areas such as Aerobic exercise and Disease. The Body mass index study combines topics in areas such as Cross-sectional study, Lean body mass, Anthropometry and Demography. His Cross-sectional study research includes elements of Screen time and Environmental health.
His primary areas of investigation include Gerontology, Demography, Obesity, Internal medicine and Body mass index. His Gerontology research is multidisciplinary, relying on both Physical fitness, Epidemiology, Public health, Health indicator and Screen time. His Demography research is multidisciplinary, incorporating elements of Logistic regression and Quartile, Confidence interval.
His work carried out in the field of Obesity brings together such families of science as Cohort and Environmental health. Ian Janssen has included themes like Diabetes mellitus, Endocrinology and Cardiology in his Internal medicine study. His study in Body mass index is interdisciplinary in nature, drawing from both Physical therapy and National Health and Nutrition Examination Survey.
Ian Janssen spends much of his time researching Demography, Gerontology, Screen time, Internal medicine and Menopause. His biological study spans a wide range of topics, including Sleep duration, Sleep in non-human animals, Body mass index and Diabetes mellitus. His studies examine the connections between Body mass index and genetics, as well as such issues in Confidence interval, with regards to Obesity.
His work in Gerontology tackles topics such as Systematic review which are related to areas like Novelty. His Screen time study integrates concerns from other disciplines, such as Psychological intervention, Cross-sectional study, Odds, Substance use and Mental health. The concepts of his Internal medicine study are interwoven with issues in Endocrinology and Cardiology.
Ian Janssen focuses on Gerontology, Demography, Screen time, Public health and Sleep in non-human animals. His Gerontology research integrates issues from Cognitive skill, Cognition and Systematic review. In his study, Internal medicine is strongly linked to Longitudinal study, which falls under the umbrella field of Cognition.
His studies in Demography integrate themes in fields like Cross-sectional study, Accelerometer data and Epidemiology. Ian Janssen has included themes like Sedentary behavior, Negatively associated, Waist and Repeated measures design in his Sleep in non-human animals study. His Guideline research focuses on Obesity and how it relates to Physical fitness.
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Systematic review of the health benefits of physical activity and fitness in school-aged children and youth
Ian Janssen;Allana G LeBlanc.
International Journal of Behavioral Nutrition and Physical Activity (2010)
Low relative skeletal muscle mass (sarcopenia) in older persons is associated with functional impairment and physical disability.
Ian Janssen;Steven B. Heymsfield;Robert Ross.
Journal of the American Geriatrics Society (2002)
Waist circumference and not body mass index explains obesity-related health risk
Ian Janssen;Peter T Katzmarzyk;Robert Ross.
The American Journal of Clinical Nutrition (2004)
Skeletal muscle mass and distribution in 468 men and women aged 18–88 yr
Ian Janssen;Steven B. Heymsfield;ZiMian Wang;Robert Ross.
Journal of Applied Physiology (2000)
Reduction in Obesity and Related Comorbid Conditions after Diet-Induced Weight Loss or Exercise-Induced Weight Loss in Men: A Randomized, Controlled Trial
Robert Ross;Damon Dagnone;Peter J.H. Jones;Heidi Smith.
Annals of Internal Medicine (2000)
Comparison of overweight and obesity prevalence in school‐aged youth from 34 countries and their relationships with physical activity and dietary patterns
I. Janssen;P. T. Katzmarzyk;W. F. Boyce;C. Vereecken.
Obesity Reviews (2005)
The healthcare costs of sarcopenia in the United States
Ian Janssen;Donald S. Shepard;Peter T. Katzmarzyk;Ronenn Roubenoff.
Journal of the American Geriatrics Society (2004)
Body mass index, waist circumference, and health risk: evidence in support of current National Institutes of Health guidelines.
Ian Janssen;Peter T. Katzmarzyk;Robert Ross.
JAMA Internal Medicine (2002)
New Canadian Physical Activity Guidelines
Mark S. TremblayM.S. Tremblay;Darren E.R. WarburtonD.E. Warburton;Ian JanssenI. Janssen;Donald H. PatersonD.H. Paterson.
Applied Physiology, Nutrition, and Metabolism (2011)
Physical activity of Canadian adults: accelerometer results from the 2007 to 2009 Canadian Health Measures Survey.
Rachel C Colley;Didier Garriguet;Ian Janssen;Cora L Craig.
Health Reports (2011)
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