Eight-year longitudinal analysis of physical activity and bone strength during adolescence: The Iowa Bone Development Study

2017 ◽  
Author(s):  
Kathleen Janz ◽  
Elena Letuchy ◽  
Steven Levy
Keyword(s):  
Physical Activity ◽  
Bone Strength ◽  
Longitudinal Analysis ◽  
Bone Development ◽  
Development Study

scholarly journals Physical activity and femoral neck bone strength during childhood: The Iowa Bone Development Study

Bone ◽  
2007 ◽  
Vol 41 (2) ◽  
pp. 216-222 ◽  
Author(s):  
Kathleen F. Janz ◽  
Julie M. Eichenberger Gilmore ◽  
Steven M. Levy ◽  
Elena M. Letuchy ◽  
Trudy L. Burns ◽  
...  
Keyword(s):  
Physical Activity ◽  
Femoral Neck ◽  
Bone Strength ◽  
Bone Development ◽  
Development Study

scholarly journals Objectively measured physical activity trajectories predict adolescent bone strength: Iowa Bone Development Study

2014 ◽  
Vol 48 (13) ◽  
pp. 1032-1036 ◽  
Author(s):  
Kathleen F Janz ◽  
Elena M Letuchy ◽  
Trudy L Burns ◽  
Julie M Eichenberger Gilmore ◽  
James C Torner ◽  
...  
Keyword(s):  
Physical Activity ◽  
Bone Strength ◽  
Bone Development ◽  
Development Study ◽  
Objectively Measured ◽  
Objectively Measured Physical Activity

2016 The Year That Was: Bone Strength

2017 ◽  
Vol 29 (1) ◽  
pp. 23-25
Author(s):  
Kathleen F. Janz
Keyword(s):  
Physical Activity ◽  
Bone Mineral Density ◽  
Fracture Risk ◽  
Precision Medicine ◽  
Bone Strength ◽  
Bone Development ◽  
High Impact ◽  
Environment Interaction ◽  
Mineral Density ◽  
Field Of Inquiry

Of all the lifestyle strategies for increasing bone strength during the growing years, physical activity is one of the most efficacious. This commentary highlights two exceptional 2016 publications addressing bone strength in children and adolescents with an eye toward reduced fracture risk later in life. The first by Weaver et al. was selected due to its comprehensive approach to understanding bone development. The second by Mitchell et al explores a new field of inquiry, that is, genetic-environment interaction as represented by bone mineral density-lowering alleles and high-impact physical activity. It is a first look at future precision medicine as it may pertain to pediatric bone strength.

scholarly journals Youth Sports Participation Is More Important among Females than Males for Predicting Physical Activity in Early Adulthood: Iowa Bone Development Study

2021 ◽  
Vol 18 (3) ◽  
pp. 1328
Author(s):  
Soyang Kwon ◽  
Elena M. Letuchy ◽  
Steven M. Levy ◽  
Kathleen F. Janz
Keyword(s):  
Physical Activity ◽  
Gender Difference ◽  
Bone Development ◽  
Early Adulthood ◽  
Youth Sports ◽  
Sports Participation ◽  
Drop Out ◽  
Multivariable Logistic Regression Analysis ◽  
Long Term Effects ◽  
Development Study

A gender difference in youth sports and physical activity participation is well documented. However, research is limited to understand potential gender difference in the long-term effects of youth sports participation. The study aim was to compare the likelihood of meeting the aerobic Physical Activity Guidelines (PAG) in early adulthood by youth sports participation patterns among females and males. The study sample included 582 Iowa Bone Development Study participants (Iowa, USA). Participation in organized sports was assessed using a physical activity questionnaire 19 times on average between age 6 and 17 years. Accelerometer and dual-energy X-ray absorptiometry assessments were conducted at an average age of 23 years. Group-based trajectory analysis was conducted to identify youth sports participation trajectory patterns. Multivariable logistic regression analysis was conducted to examine the association between youth sports participation patterns and meeting the PAG in adulthood. We identified three youth sports participation patterns: “continuous participation,” “drop-out,” and “no participation.” Females in the continuous participation group were more likely to meet the aerobic PAG at age 23 years, compared to females in the no-participation group (OR = 2.63; 95% CI = 1.05, 6.55) or the drop-out group (OR = 2.55; 95% CI = 1.38, 4.69). However, among males, youth sports participation patterns were not significantly associated with meeting the aerobic PAG at age 23 years. In conclusion, this study suggests that youth sports participation could be more important among females than males for predicting physical activity in early adulthood.

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