K Janz

Summary

Affiliation: University of Iowa
Country: USA

Publications

  1. ncbi request reprint Validation evidence for the Netherlands physical activity questionnaire for young children: the Iowa bone development study
    Kathleen F Janz
    Department of Health and Sports Studies, The University of Iowa, IA 52242, USA
    Res Q Exerc Sport 76:363-9. 2005
  2. doi request reprint Measuring activity in children and adolescents using self-report: PAQ-C and PAQ-A
    Kathleen F Janz
    Department of Health and Sports Studies, University of Iowa, Iowa City, IA 52242, USA
    Med Sci Sports Exerc 40:767-72. 2008
  3. pmc Tracking of accelerometry-measured physical activity during childhood: ICAD pooled analysis
    Soyang Kwon
    Consortium to Lower Obesity in Chicago Children, Children s Memorial Hospital, Chicago, IL 60614, USA
    Int J Behav Nutr Phys Act 9:68. 2012
  4. pmc Tracking of TV and video gaming during childhood: Iowa Bone Development Study
    Shelby L Francis
    Department of Health and Human Physiology, University of Iowa, Iowa City, IA, USA
    Int J Behav Nutr Phys Act 8:100. 2011
  5. pmc Physical activity in epidemiology: moving from questionnaire to objective measurement
    K F Janz
    Department of Health and Sport Studies, University of Iowa, Iowa City, IA 52242, USA
    Br J Sports Med 40:191-2. 2006
  6. ncbi request reprint Physical activity augments bone mineral accrual in young children: The Iowa Bone Development study
    Kathleen F Janz
    Department of Health and Sport Studies, The University of Iowa, Iowa City, Iowa 52242, USA
    J Pediatr 148:793-9. 2006
  7. pmc Physical activity and femoral neck bone strength during childhood: the Iowa Bone Development Study
    Kathleen F Janz
    Department of Health and Sport Studies, The University of Iowa, Iowa City, Iowa, USA
    Bone 41:216-22. 2007
  8. doi request reprint Subjective and objective measures of physical activity in relationship to bone mineral content during late childhood: the Iowa Bone Development Study
    K F Janz
    Department of Health and Sport Studies, University of Iowa, Iowa City, IA 52242, USA
    Br J Sports Med 42:658-63. 2008
  9. pmc Sustained effect of early physical activity on body fat mass in older children
    Kathleen F Janz
    Department of Health and Sport Studies, University of Iowa, Iowa City, Iowa 52242, USA
    Am J Prev Med 37:35-40. 2009
  10. pmc Early physical activity provides sustained bone health benefits later in childhood
    Kathleen F Janz
    Department of Health and Sport Studies, The University of Iowa, Iowa City, IA 52242, USA
    Med Sci Sports Exerc 42:1072-8. 2010

Collaborators

Detail Information

Publications31

  1. ncbi request reprint Validation evidence for the Netherlands physical activity questionnaire for young children: the Iowa bone development study
    Kathleen F Janz
    Department of Health and Sports Studies, The University of Iowa, IA 52242, USA
    Res Q Exerc Sport 76:363-9. 2005
  2. doi request reprint Measuring activity in children and adolescents using self-report: PAQ-C and PAQ-A
    Kathleen F Janz
    Department of Health and Sports Studies, University of Iowa, Iowa City, IA 52242, USA
    Med Sci Sports Exerc 40:767-72. 2008
    ....
  3. pmc Tracking of accelerometry-measured physical activity during childhood: ICAD pooled analysis
    Soyang Kwon
    Consortium to Lower Obesity in Chicago Children, Children s Memorial Hospital, Chicago, IL 60614, USA
    Int J Behav Nutr Phys Act 9:68. 2012
    ..We compared tracking of PA according to PA level and type of day (weekday/weekend) in a pool of five children's cohort studies...
  4. pmc Tracking of TV and video gaming during childhood: Iowa Bone Development Study
    Shelby L Francis
    Department of Health and Human Physiology, University of Iowa, Iowa City, IA, USA
    Int J Behav Nutr Phys Act 8:100. 2011
    ..This study examined tracking of TV viewing (TV) and video game use (VG) from middle childhood through early adolescence after adjusting for moderate and vigorous physical activity (MVPA), percentage of body fat (% BF), and maturity...
  5. pmc Physical activity in epidemiology: moving from questionnaire to objective measurement
    K F Janz
    Department of Health and Sport Studies, University of Iowa, Iowa City, IA 52242, USA
    Br J Sports Med 40:191-2. 2006
  6. ncbi request reprint Physical activity augments bone mineral accrual in young children: The Iowa Bone Development study
    Kathleen F Janz
    Department of Health and Sport Studies, The University of Iowa, Iowa City, Iowa 52242, USA
    J Pediatr 148:793-9. 2006
    ..This 3-year follow-up study examined associations between physical activity and bone mineral content (BMC) and whether physical activity augments BMC accrual...
  7. pmc Physical activity and femoral neck bone strength during childhood: the Iowa Bone Development Study
    Kathleen F Janz
    Department of Health and Sport Studies, The University of Iowa, Iowa City, Iowa, USA
    Bone 41:216-22. 2007
    ..These results suggest that physical activity is an important contributor to bone strength prior to adolescence and that increasing levels of physical activity during childhood are likely to enhance optimal bone strength...
  8. doi request reprint Subjective and objective measures of physical activity in relationship to bone mineral content during late childhood: the Iowa Bone Development Study
    K F Janz
    Department of Health and Sport Studies, University of Iowa, Iowa City, IA 52242, USA
    Br J Sports Med 42:658-63. 2008
    ..This study compared accelerometry to self-report for the assessment of physical activity (PA) in relation to bone mineral content (BMC). In addition, we compared the ability of these measures to assess PA in boys versus girls...
  9. pmc Sustained effect of early physical activity on body fat mass in older children
    Kathleen F Janz
    Department of Health and Sport Studies, University of Iowa, Iowa City, Iowa 52242, USA
    Am J Prev Med 37:35-40. 2009
    ..Physical activity is assumed to reduce excessive fatness in children. This study examined whether the benefits of early childhood moderate-to-vigorous physical activity (MVPA) on fatness are sustained throughout childhood...
  10. pmc Early physical activity provides sustained bone health benefits later in childhood
    Kathleen F Janz
    Department of Health and Sport Studies, The University of Iowa, Iowa City, IA 52242, USA
    Med Sci Sports Exerc 42:1072-8. 2010
    ..This study examined the potential effect of early childhood moderate and vigorous physical activity (MVPA) on later bone health...
  11. ncbi request reprint Tracking of activity and sedentary behaviors in childhood: the Iowa Bone Development Study
    Kathleen F Janz
    Department of Health and Sport Studies, University of Iowa, Iowa City, 52242, USA
    Am J Prev Med 29:171-8. 2005
    ..This study examined the tracking of activity and sedentary behavior in relation to adiposity during middle childhood...
  12. ncbi request reprint Three-year follow-up of changes in aerobic fitness during puberty: the Muscatine Study
    K F Janz
    Department of Sport, Health, and Leisure Studies, University of Iowa, USA
    Res Q Exerc Sport 68:1-9. 1997
    ..min-1). Measures of aerobic fitness prior to and during early puberty tend to predict aerobic fitness during puberty...
  13. ncbi request reprint Longitudinal analysis of scaling VO2 for differences in body size during puberty: the Muscatine Study
    K F Janz
    Department of Sport, Health, and Leisure Studies, University of Iowa, Iowa City 52242, USA
    Med Sci Sports Exerc 30:1436-44. 1998
    ..The purpose of this study was to determine an appropriate method to "normalize" oxygen uptake (VO2) for body size in children and adolescents...
  14. ncbi request reprint Predicting heart growth during puberty: The Muscatine Study
    K F Janz
    Department of Sport, Health, and Leisure Studies, University of Iowa, Iowa City 52242, USA
    Pediatrics 105:E63. 2000
    ....
  15. ncbi request reprint Tracking physical fitness and physical activity from childhood to adolescence: the muscatine study
    K F Janz
    Department of Sport, Health, and Leisure Studies, University of Iowa, Iowa City 52242, USA
    Med Sci Sports Exerc 32:1250-7. 2000
    ..provide insight as to when programs focusing on preventing sedentary adults behaviors should be initiated...
  16. ncbi request reprint Physical activity and bone measures in young children: the Iowa bone development study
    K F Janz
    Department of Health, Leisure, and Sport Studies, University of Iowa, Iowa City, IA 52242, USA
    Pediatrics 107:1387-93. 2001
    ..In this cross-sectional study, we examined associations between physical activity and bone measures in 368 preschool children (mean age: 5.2 years, range: 4-6 years)...
  17. ncbi request reprint Physical activity and bone development during childhood and adolescence. Implications for the prevention of osteoporosis
    K Janz
    Department of Health, Leisure, and Sport Studies, University of Iowa, Iowa City, IA, USA
    Minerva Pediatr 54:93-104. 2002
    ..Since it is a behavior, physical activity is a potentially modifiable determinant of peak bone mass; therefore, understanding activity's impact on bone health is central to developing primary prevention strategies for osteoporosis...
  18. ncbi request reprint Increases in physical fitness during childhood improve cardiovascular health during adolescence: the Muscatine Study
    K F Janz
    Department of Health, Leisure, and Sport Studies Department of epidemilogy, University of Iowa, Iowa City, Iowa 52242, USA
    Int J Sports Med 23:S15-21. 2002
    ..Childhood health promotion programs that specifically target increases in physical fitness may help to reduce the increasing prevalence of adolescent obesity...
  19. ncbi request reprint Fatness, physical activity, and television viewing in children during the adiposity rebound period: the Iowa Bone Development Study
    Kathleen F Janz
    Department of Health and Sport Studies, 102 FH, The University of Iowa, Iowa City, IA 52242, USA
    Prev Med 35:563-71. 2002
    ..Activity was measured using accelerometry and parental report of children's television (TV) viewing. Dual energy X-ray absorptiometry was used to quantify body composition...
  20. ncbi request reprint Everyday activity predicts bone geometry in children: the iowa bone development study
    Kathleen F Janz
    Health and Sport Studies, The University of Iowa, Iowa City, IA 52242, USA
    Med Sci Sports Exerc 36:1124-31. 2004
    ..2 yr). We also examined whether lean tissue mass, which is predominantly muscle, mediates the relationship between physical activity and bone structural measures...
  21. ncbi request reprint Gene polymorphisms, bone mineral density and bone mineral content in young children: the Iowa Bone Development Study
    Marcia C Willing
    Department of Pediatrics, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA
    Osteoporos Int 14:650-8. 2003
    ..Our data suggest that genetic variation at multiple genetic loci is important in bone accrual in children. Moreover, the combination of genotypes as several loci may be as important as a single genotype for determining BMD and BMC...
  22. ncbi request reprint The relationship between active living and health-related quality of life: income as a moderator
    Jana J Peterson
    Department of Community and Behavioral Health, College of Public Health, University of Iowa, 1215 Westlawn, Iowa City, 52242, USA
    Health Educ Res 21:146-56. 2006
    ..Findings highlight the need for increased and specifically targeted promotion of active living interventions...
  23. pmc A hip analysis protocol for pediatric bone densitometry: the Iowa Bone Development Study
    Julie M Eichenberger Gilmore
    Department of Preventive and Community Dentistry, The University of Iowa, Iowa City, IA, USA
    J Clin Densitom 13:361-9. 2010
    ..The IBDS protocol provides a reproducible method for evaluating pediatric proximal femur DXA scans during growth...
  24. ncbi request reprint Percentile distributions of bone measurements in Iowa children: the Iowa Bone Development Study
    Marcia C Willing
    Department of Pediatrics, Roy J and Lucille A Carver College of Medicine, Iowa City, IA 52242, USA
    J Clin Densitom 8:39-47. 2005
    ..Gender, age, and height are useful clinical predictors of BMD and BMC in young children...
  25. doi request reprint Paths to leisure physical activity among adults with intellectual disabilities: self-efficacy and social support
    Jana J Peterson
    Oregon Health and Science University, Child Development and Rehabilitation Center, 3181 Sam Jackson Park Road, Portland, OR 97239, USA
    Am J Health Promot 23:35-42. 2008
    ..This study tested a path model that included perceptions of social support and self-efficacy for leisure physical activity and leisure physical activity participation among adults with intellectual disabilities...
  26. ncbi request reprint The relationship between lower extremity strength and power to everday walking behaviors in older adults with functional limitations
    Michael L Puthoff
    St Ambrose University, Physical Therapy Department, Davenport, IA 52803, USA
    J Geriatr Phys Ther 31:24-31. 2008
    ..The purpose of this study was to examine the relationship between lower extremity strength, peak power, power at a low relative intensity, and power at a high relative intensity to everyday walking behaviors in older adults...
  27. pmc Impact of exercise on overnight glycemic control in children with type 1 diabetes mellitus
    Eva Tsalikian
    DirectNet Coordinating Center, Jaeb Center for Health Research, Tampa, Florida 33647, USA
    J Pediatr 147:528-34. 2005
    ..To examine the effect of exercise on overnight hypoglycemia in children with type 1 diabetes mellitus (T1DM)...
  28. ncbi request reprint Calibration of accelerometer output for children
    Patty Freedson
    Department of Exercise Science, University of Massachusetts, Amherst, MA 01003, USA
    Med Sci Sports Exerc 37:S523-30. 2005
    ..Important considerations for defining best practices for accelerometer calibration in children and youths are presented...
  29. ncbi request reprint Postoperative activity restrictions: any evidence?
    Larissa F Weir
    Department of Obstetrics and Gynecology, San Antonio Uniformed Services Health Education Consortium, Texas, USA
    Obstet Gynecol 107:305-9. 2006
    ..Our aim was to describe intra-abdominal pressures during common physical activities...
  30. pmc Prevention of hypoglycemia during exercise in children with type 1 diabetes by suspending basal insulin
    Eva Tsalikian
    Diabetes Care 29:2200-4. 2006
    ..The Diabetes Research in Children Network (DirecNet) Study Group conducted a study to determine whether stopping basal insulin could reduce the frequency of hypoglycemia occurring during exercise...
  31. ncbi request reprint Function of the GlucoWatch G2 Biographer during exercise
    Eva Tsalikian
    Diabetes Technol Ther 7:230. 2005