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Articles 1 - 13 of 13
Full-Text Articles in Life Sciences
The Relationship Of Area-Level Sociodemographic Characteristics, Household Composition And Individual-Level Socioeconomic Status On Walking Behavior Among Adults, Mary O. Hearst, John R. Sirard, Ann Forsyth, Emily D. Parker, Elizabeth G. Klein, Christine G. Green, Leslie A. Lytle
The Relationship Of Area-Level Sociodemographic Characteristics, Household Composition And Individual-Level Socioeconomic Status On Walking Behavior Among Adults, Mary O. Hearst, John R. Sirard, Ann Forsyth, Emily D. Parker, Elizabeth G. Klein, Christine G. Green, Leslie A. Lytle
John Sirard
Understanding the contextual factors associated with why adults walk is important for those interested in increasing walking as a mode of transportation and leisure. This paper investigates the relationships between neighborhood-level sociodemographic context, individual level sociodemographic characteristics and walking for leisure and transport. Data from two community-based studies of adults (n=550) were used to determine the association between the area-sociodemographic environment (ASDE), calculated from U.S. Census variables, and individual-level SES as potential correlates of walking behavior. Descriptive statistics, mean comparisons and Pearson’s correlations coefficients were used to assess bivariate relationships. Generalized estimating equations were used to model the relationship between …
Evaluation Of Two Self-Report Measures Of Physical Activity With Accelerometry In Young Adults, John R. Sirard, Peter J. Hannan, Gretche J. Cutler, Dan J. Graham, Dianne Neumark-Sztainer
Evaluation Of Two Self-Report Measures Of Physical Activity With Accelerometry In Young Adults, John R. Sirard, Peter J. Hannan, Gretche J. Cutler, Dan J. Graham, Dianne Neumark-Sztainer
John Sirard
Background—The purpose of this paper is to evaluate self reported physical activity of young adults using one-week and one-year recall measures with an accelerometer as the criterion measure. Methods—Participants were a subsample (N=121, 24±1.7 yrs) from a large longitudinal cohort study. Participants completed a detailed one-year physical activity recall, wore an accelerometer for one week and then completed a brief one-week physical activity recall when they returned the accelerometer. Results—Mean values for moderate-to-vigorous physical activity (MVPA) from the three instruments were 3.2, 2.2, and 13.7 hours/wk for the accelerometer, one-week recall, and one-year recall, respectively (all different from each other, …
Physical Activity And Screen Time In Adolescents And Their Friends, John R. Sirard, Meg Bruening, Melanie M. Wall, Marla E. Eisenberg, Sun K. Kim, Dianne Neumark-Sztainer
Physical Activity And Screen Time In Adolescents And Their Friends, John R. Sirard, Meg Bruening, Melanie M. Wall, Marla E. Eisenberg, Sun K. Kim, Dianne Neumark-Sztainer
John Sirard
Background—Little is known about the actual physical activity and screen time behaviors of an adolescent’s friends relative to the individual’s behavior. Purpose—To determine the associations between an adolescent’s physical activity and screen time and his/her nominated friends’ physical activity and screen time. Methods—Data were obtained from EAT 2010 (Eating and Activity Among Teens), a large cross-sectional study (n=2126) conducted in 20 middle schools and high schools in Minneapolis/ St. Paul MN during the 2009–2010 academic year and analyzed during 2011. Each participant nominated up to six friends from a school roster, and data from those friends were obtained as part …
Multilevel Predictors Of Adolescent Physical Activity: A Longitudinal Analysis, Mary O. Hearst, Carrie D. Patnode, John R. Sirard, Kian Farbakhsh, Leslie A. Lytle
Multilevel Predictors Of Adolescent Physical Activity: A Longitudinal Analysis, Mary O. Hearst, Carrie D. Patnode, John R. Sirard, Kian Farbakhsh, Leslie A. Lytle
John Sirard
Background To examine how factors from a social ecologic model predict physical activity (PA) among adolescents using a longitudinal analysis. Methods Participants in this longitudinal study were adolescents (ages 10-16 at baseline) and one parent enrolled in the Transdisciplinary Research on Energetics and Cancer-Identifying Determinants of Eating and Activity (TREC-IDEA) and the Etiology of Childhood Obesity (ECHO). Both studies were designed to assess a socio-ecologic model of adolescent obesity risk. PA was collected using ActiGraph activity monitors at two time points 24 months apart. Other measures included objective height and weight, adolescent and parent questionnaires on multilevel psychological, behavioral and …
Evaluating A Model Of Youth Physical Activity, Carrie D. Heitzler, Leslie A. Lytle, Darin J. Erickson, Daheia Barr-Anderson, John R. Sirard, Mary Story
Evaluating A Model Of Youth Physical Activity, Carrie D. Heitzler, Leslie A. Lytle, Darin J. Erickson, Daheia Barr-Anderson, John R. Sirard, Mary Story
John Sirard
Objective—To explore the relationship between social influences, self-efficacy, enjoyment, and barriers and physical activity. Methods—Structural equation modeling examined relationships between parent and peer support, parent physical activity, individual perceptions, and objectively measured physical activity using accelerometers among a sample of youth aged 10–17 years (N=720). Results—Peer support, parent physical activity, and perceived barriers were directly related to youth activity. The proposed model accounted for 14.7% of the variance in physical activity. Conclusions—The results demonstrate a need to further explore additional individual, social, and environmental factors that may influence youth’s regular participation in physical activity.
Relationships Between Energy Balance Knowledge And The Home Environment, Megan E. Slater, John R. Sirard, Melissa N. Laska, Mark A. Pereira, Leslie A. Lytle
Relationships Between Energy Balance Knowledge And The Home Environment, Megan E. Slater, John R. Sirard, Melissa N. Laska, Mark A. Pereira, Leslie A. Lytle
John Sirard
Certain aspects of the home environment as well as individuals’ knowledge of energy balance are believed to be important correlates of various dietary and physical activity behaviors, but no known studies have examined potential relationships between these correlates. This study evaluated cross-sectional associations between characteristics of the home environment and energy balance knowledge among 349 youth/parent pairs recruited from the Minneapolis-St. Paul metropolitan area from September 2006 to June 2007. Linear regression models adjusted for student grade and highest level of parental education were used to compare data from home food, physical activity, and media inventories (parent-reported) with energy balance …
The Physical Activity Climate In Minnesota Middle And High Schools, Anne Samuelson, Leslie Lytle, Keryn Pasch, Kian Farbakhsh, Stacey Moe, John R. Sirard
The Physical Activity Climate In Minnesota Middle And High Schools, Anne Samuelson, Leslie Lytle, Keryn Pasch, Kian Farbakhsh, Stacey Moe, John R. Sirard
John Sirard
Background—This article describes policies, practices, and facilities that form the physical activity climate in Minneapolis/St. Paul, Minnesota metro area middle and high schools and examines how the physical activity climate varies by school characteristics, including public/private, school location and grade level. Methods—Surveys examining school physical activity practices, policies and environment were administered to principals and physical education department heads from 115 middle and high schools participating in the Transdisciplinary Research on Energetics and Cancer-Identifying Determinants of Eating and Activity (TREC-IDEA) study. Results—While some supportive practices were highly prevalent in the schools studied (such as prohibiting substitution of other classes for …
Neighborhood Design And Perceptions: Relationship With Active Commuting, Carolyn C. Voorhees, J. Scott Ashwood, Kelly R. Evenson, John R. Sirard, Ariane L. Rung, Marsha Dowda, Thomas L. Mckenzie
Neighborhood Design And Perceptions: Relationship With Active Commuting, Carolyn C. Voorhees, J. Scott Ashwood, Kelly R. Evenson, John R. Sirard, Ariane L. Rung, Marsha Dowda, Thomas L. Mckenzie
John Sirard
Purpose—Walking to and from school contributes to total physical activity levels. This study investigated whether perceived and actual neighborhood features were associated with walking to or from school among adolescent girls. Methods—A sample of geographically diverse 8th grade girls (N=890) from the Trial for Activity in Adolescent Girls (TAAG) study living within 1.5 miles of their middle school were recruited. Participants completed a self-administered survey on their neighborhood and walking behavior. Geographic information system (GIS) data were used to assess objective neighborhood features. Nested multivariable logistic regression analyses were conducted to determine the contribution of perceived and objective measures of …
The Relative Influence Of Demographic, Individual, Social, And Environmental Factors On Physical Activity Among Boys And Girls, Carrie D. Patnode, Leslie A. Lytle, Darin J. Erickson, John R. Sirard, Daheia Barr-Anderson, Mary Story
The Relative Influence Of Demographic, Individual, Social, And Environmental Factors On Physical Activity Among Boys And Girls, Carrie D. Patnode, Leslie A. Lytle, Darin J. Erickson, John R. Sirard, Daheia Barr-Anderson, Mary Story
John Sirard
Background: This study aimed to evaluate the associations of selected demographic, individual, social, and environmental factors with moderate-to-vigorous physical activity (MVPA) in a sample of children and adolescents. Methods: MVPA was assessed among youth (n = 294) 10-17-years-old using the ActiGraph accelerometer. Youth completed measures of demographic and individual variables related to physical activity (PA), perceived social support by parents and peers, and perceived neighborhood characteristics. Parents completed the long-form of the International Physical Activity Questionnaire. The Physical Activity and Media Inventory was used to measure the home environment and Geographical Information Systems software was used to measure the physical …
Adolescent Physical Activity And Screen Time: Associations With The Physical Home Environment, John R. Sirard, Melissa N. Laska, Carrie D. Patnode, Kian Farbakhsh, Leslie A. Lytle
Adolescent Physical Activity And Screen Time: Associations With The Physical Home Environment, John R. Sirard, Melissa N. Laska, Carrie D. Patnode, Kian Farbakhsh, Leslie A. Lytle
John Sirard
Background: Previous research on the environment and physical activity has mostly focused on macro-scale environments, such as the neighborhood environment. There has been a paucity of research on the role of microscale and proximal environments, such as that of the home which may be particularly relevant for younger adolescents who have more limited independence and mobility. The purpose of this study was to describe associations between the home environment and adolescent physical activity, sedentary time, and screen time. Methods: A total of 613 parent-adolescent dyads were included in these analyses from two ongoing cohort studies. Parents completed a Physical Activity …
Compliance With Wearing Physical Activity Accelerometers In High School Students, John R. Sirard, Megan E. Slater
Compliance With Wearing Physical Activity Accelerometers In High School Students, John R. Sirard, Megan E. Slater
John Sirard
Background—Accelerometer use in physical activity research has become increasingly popular but is prone to problems with missing data, which complicate the data reduction and analysis process. The purpose of this study was to determine the effect of hypothesized compliance strategies on improving compliance with wearing a physical activity accelerometer in high school students. Methods—Each of four local high schools was assigned to one of four compliance strategies: (1) receiving three phone calls, (2) completing a daily journal, (3) compensation contingent on number of complete (≥ 10 hours) days of data, and (4) control condition. Participants wore ActiGraph accelerometers for seven …
Objectively Measured Physical Activity In Urban Alternative High School Students, John R. Sirard, Martha Y. Kubik, Jayne A. Fulkerson, Chrisa Arcan
Objectively Measured Physical Activity In Urban Alternative High School Students, John R. Sirard, Martha Y. Kubik, Jayne A. Fulkerson, Chrisa Arcan
John Sirard
Introduction—Alternative high school students are an underserved population of youth at greater risk for poor health behaviors and outcomes. Little is known about their physical activity patterns. Purpose—The purpose of this study was to describe 1) physical activity levels of students attending alternative high schools (AHS) in St. Paul/Minneapolis, MN and 2) compliance with wearing a physical activity accelerometer. Methods—Sixty-five students (59% male, 65% <18 years>old, 51% African-American, 17% Caucasian, 32% mixed and other) wore an accelerometer during all waking hours for seven days as part of the baseline assessment for a school-based physical activity and dietary behavior intervention. Accelerometer data …
International Journal Of Behavioral Nutrition And Physical Activity, John R. Sirard, Melissa C. Nelson, Mark A. Pereira, Leslie A. Lytle
International Journal Of Behavioral Nutrition And Physical Activity, John R. Sirard, Melissa C. Nelson, Mark A. Pereira, Leslie A. Lytle
John Sirard
Background: Little is known about how the home environmental supports physical activity and screen media usage. The purpose of this study was to develop and test the reliability and validity of a self-report instrument to comprehensively reflect the availability and accessibility of physical activity and screen media equipment in the home environment. Methods: Ten families participated in the initial field testing to provide feedback for instrument development. Thirty one adult participants, each of whom had at least one child 10–17 years old, completed two Physical Activity and Media Inventory (PAMI) instruments. The first PAMI was completed simultaneously, but independently, with …