This study identifies an association between increased recreational screen time and vitamin D deficiency among children and adolescents. Children and adolescents engaging in five or more hours of daily screen time exhibited more than double the risk of vitamin D deficiency compared to those with lower screen exposure. These findings underscore the importance of clinicians assessing screen habits in pediatric patients, as excessive screen time may reduce outdoor activity and sunlight exposure, leading to health risks. Monitoring and managing screen time, alongside considering vitamin D supplementation and outdoor activity, may help mitigate deficiency and associated conditions.
Introduction: Military body fat standards were implemented in the 1980s to prevent obesity and associated poor military readiness. In the past 2 decades, enforcement of existing Army body composition standards has been eroded by the steady increase in national obesity rates, the demand for new recruits especially during the 2007 surge in Iraq, and the COVID epidemic in 2020. The diminishing qualified recruit pool puts a new focus on accession standards.
Department of Nutrition, Child Growth and Development Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran.
Introduction: Modification of natural enzymes to introduce new properties and enhance existing ones is a central challenge in bioengineering. This study is focused on the development of Taq polymerase mutants that show enhanced reverse transcriptase (RTase) activity while retaining other desirable properties such as fidelity, 5'- 3' exonuclease activity, effective deoxyuracyl incorporation, and tolerance to locked nucleic acid (LNA)-containing substrates. Our objective was to use AI-driven rational design combined with multiparametric wet-lab analysis to identify and validate Taq polymerase mutants with an optimal combination of these properties.
Introduction: The association of screen time and physical activity with body weight in children has been investigated in cross-sectional and prospective studies, as well as randomized controlled trials. The present study extends previous research by examining how longitudinal within-person changes in screen time and physical activity relate to changes in Body Mass Index (BMI) in children, and how changes in screen time and physical activity relate to each other.
Methods: The data for the present study came from the PIER Youth Study.
