A holistic measurement model of movement competency in children

Different countries have different methods for assessing movement competence in children; however, it is unclear whether the test batteries that are used measure the same aspects of movement competence. The aim of this paper was to (1) investigate whether the Test of Gross Motor Development (TGMD-2) and Körperkoordinations Test für Kinder (KTK) measure the same aspects of children’s movement competence and (2) examine the factorial structure of the TGMD-2 and KTK in a sample of Australian children. A total of 158 children participated (M age = 9.5; SD = 2.2). First, confirmatory factor analysis examined the independent factorial structure of the KTK and TGMD-2. Second, it was investigated whether locomotor, object control and body coordination loaded on the latent variable Movement Competency. Confirmatory factor analysis indicated an adequate fit for both the KTK and TGMD-2. An adequate fit was also achieved for the final model. In this model, locomotor (r = .86), object control (r = .71) and body coordination (r = .52) loaded on movement competence. Findings support our hypothesis that the TGMD-2 and KTK measure discrete aspects of movement competence. Future researchers and practitioners should consider using a wider range of test batteries to assess movement competence

Weak lensing, dark matter and dark energy

Weak gravitational lensing is rapidly becoming one of the principal probes of dark matter and dark energy in the universe. In this brief review we outline how weak lensing helps determine the structure of dark matter halos, measure the expansion rate of the universe, and distinguish between modified gravity and dark energy explanations for the acceleration of the universe. We also discuss requirements on the control of systematic errors so that the systematics do not appreciably degrade the power of weak lensing as a cosmological probe.Comment: Invited review article for the GRG special issue on gravitational lensing (P. Jetzer, Y. Mellier and V. Perlick Eds.). V3: subsection on three-point function and some references added. Matches the published versio

Discussing childhood overweight and obesity with parents: a health communication dilemma

Childhood obesity has reached alarming levels and the problem has assumed great significance for health care staff who work with overweight children and their families. Anecdotal accounts of the difficulties that may emerge when health care providers communicate that a child's weight is outside of the normal range, were a key stimulus for this review. A local government health department commissioned a review of literature on communicating with parents about childhood overweight and obesity. Literature concerned with communicating a child's overweight to parents was limited and, as a result, this review draws upon a disparate body of literature to examine what is known and what might be helpful for health care providers when discussing a child's weight with the child and parents. This paper identifies a range of factors influencing communication between health care workers and parents and offers a number of practical approaches and strategies for facilitating successful communication between health practitioners and the parents of children

Atherosclerosis regression.

Atherosclerosis follows the deposition, retention, and oxidative modification of lipoproteins, especially low-density lipoprotein (LDL) in the walls of large arteries. Uptake of oxidized LDL results in the formation of macrophage foam cells. Proliferation of vascular smooth muscle cells and secretion of extracellular matrix contribute "fibrous" components of the plaque, whereas ongoing accumulation of lipid and inflammatory cell debris forms the necrotic lipid core of the mature atherosclerotic plaque. Both the size and composition of plaques determine the clinical course. In particular, a large lipid core, thin fibrous cap, dense inflammatory cell infiltrate, and proteolytic enzyme activity are associated with adverse risk. Atherosclerosis has often been considered a relentlessly progressive disease. However, new imaging techniques that can quantify plaque burden and provide insights into some of the specific plaque components have allowed regression to be mapped for the first time. In this article, drugs targeting atherosclerosis that have potential or proven benefit in atherosclerosis regression are discussed