John R Sirard
Affiliation: Stanford University
- Influences of preschool policies and practices on children's physical activityMarsha Dowda
Stanford Prevention Research Center, Stanford University School of Medicine, USA
J Community Health 29:183-96. 2004..Children who attended preschools with lower quality spent more time in sedentary activity. In conclusion, children in preschools which may have more resources and better quality appear to show both more sedentary behavior and more MVPA...
- Motivational factors associated with sports program participation in middle school studentsJohn R Sirard
Department of Exercise Science, University of South Carolina, Columbia, South Carolina, USA
J Adolesc Health 38:696-703. 2006....
- Prevalence of active commuting at urban and suburban elementary schools in Columbia, SCJohn R Sirard
Stanford Prevention Research Center, Stanford University School of Medicine, Hoover Pavilion, Room N229, 211 Quarry Rd, Stanford, CA 94305 5705, USA
Am J Public Health 95:236-7. 2005..These results indicate a need for school- and community-based interventions...
- Physical activity and active commuting to elementary schoolJohn R Sirard
Department of Exercise Science, University of South Carolina, Columbia, SC, USA
Med Sci Sports Exerc 37:2062-9. 2005..This study was conducted to determine if fifth-grade students who walked or bicycled to school on a regular basis were more physically active than those that did not...
- Sport participation and physical activity in adolescent females across a four-year periodKarin Allor Pfeiffer
Department of Exercise Science, University of South Carolina, Columbia, South Carolina 29208, USA
J Adolesc Health 39:523-9. 2006..A secondary purpose was to compare activity levels of three groups of girls, those who played sports at three time points, those who dropped out, and those who did not participate in sports...
- Agreement between student-reported and proxy-reported physical activity questionnairesMarsha Dowda
Dept of Exercise Science, University of South Carolina, Columbia, SC, USA
Pediatr Exerc Sci 19:310-8. 2007..21 for student report and--.14 to .32 for parent report, and there were no statistical differences for 8 out of 9 correlations between parent and student. Parents can provide useful data on PA correlates for students in Grades 7-12...
- The effects of increasing outdoor play time on physical activity in Latino preschool childrenSofiya Alhassan
Stanford Prevention Research Center, Department of Medicine and Division of General Pediatrics, University School of Medicine, Stanford, California 94305 5705, USA
Int J Pediatr Obes 2:153-8. 2007..A randomized controlled pilot study to test the hypothesis that increasing preschool children's outdoor free play time increases their daily physical activity levels...
- A preliminary test of a student-centered intervention on increasing physical activity in underserved adolescentsDawn K Wilson
Department of Psychology, University of South Carolina, Columbia, SC 29208, USA
Ann Behav Med 30:119-24. 2005..Previous studies have shown that choice and self-initiated behavior change are important for increasing intrinsic motivation and physical activity (PA), however, little of this research has focused on underserved adolescents...
- Using pedometers to increase physical activity and improve health: a systematic reviewDena M Bravata
Center for Primary Care and Outcomes Research, Stanford University, Stanford, California, USA
JAMA 298:2296-304. 2007..Without detailed evidence of their effectiveness, pedometers have recently become popular as a tool for motivating physical activity...
- Preventing childhood obesity: a solution-oriented research paradigmThomas N Robinson
Division of General Pediatrics, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305 5705, USA
Am J Prev Med 28:194-201. 2005....
- Perceived environmental predictors of physical activity over 6 months in adults: activity counseling trialJames F Sallis
Department of Psychology, San Diego State University, 3900 Fifth Avenue, San Diego, CA 92103, USA
Health Psychol 26:701-9. 2007..In the present study, the authors extend previous cross-sectional findings by using a prospective design to determine whether physical and social environmental characteristics predict physical activity over 6 months...
- Physical fitness and performance. Cardiorespiratory fitness in girls-change from middle to high schoolKarin A Pfeiffer
Department of Kinesiology, Michigan State University, East Lansing, MI 48824, USA
Med Sci Sports Exerc 39:2234-41. 2007..To determine how factors are related to change in cardiorespiratory fitness (CRF) across time in middle school girls followed through high school...
- Physical activity in adolescents: from associations to interventionsJohn R Sirard
J Adolesc Health 42:327-8. 2008
- Estimating physical activity from incomplete accelerometer data in field studiesSofiya Alhassan
Dept of Kinesiology, University of Massachusetts, Amherts, MA 01003 0258, USA
J Phys Act Health 5:S112-25. 2008..The purpose of this study was to develop a data-driven approach for analyzing incomplete accelerometer data from field-base studies...
- Race differences in activity, fitness, and BMI in female eighth graders categorized by sports participation statusJohn R Sirard
Division of Epidemiology and Community Health School of Public Health, University of Minnesota, Minneapolis, MN 55454 1015, USA
Pediatr Exerc Sci 20:198-210. 2008..Whereas PA intervention programs that incorporate a sports-team component could benefit all girls, African-American girls could be specifically targeted because of their lower physical activity...
- Longitudinal and secular trends in physical activity and sedentary behavior during adolescenceMelissa C Nelson
Division of Epidemiology and Community Health, University of Minnesota, 1300 S 2nd St, WBOB Suite 300, Minneapolis, MN 55454 1015, USA
Pediatrics 118:e1627-34. 2006..The objective of this research was to investigate longitudinal and secular trends in physical activity and sedentary behavior in a large, diverse cohort of adolescents...