Construct validity evidence for single-response items to estimate physical activity levels in large sample studies

Valid measurement of physical activity is important for studying the risks for morbidity and mortality. The purpose of this study was to examine evidence of construct validity of two similar single-response items assessing physical activity via self-report. Both items are based on the stages of change model. The sample was 687 participants (men = 504, women = 183) who completed an 8-response (PA8) or 5-response (PA5) single-response item about current level of physical activity. Responses were categorized as meeting or not meeting guidelines for sufficient physical activity to achieve a health benefit. Maximal cardiorespiratory fitness (CRF) and health markers were obtained during a clinical examination. Partial correlation, multivariate analysis of covariance, and logistic regression were used to identify the relations between self-reported physical activity, CRF, and health markers when controlling for gender and age. Single-response items were compared to a detailed measure of physical activity. Single-response items correlated significantly with CRF determined with a maximal exercise test on a treadmill (PA8 = .53; PA5 = .57). Differences in percentage of body fat and cholesterol were in the desired direction, with those self-reporting sufficient physical activity for a health benefit having the lower values. The single-response items demonstrated evidence of construct validity and may provide feasible, cost-effective, and efficient methods to assess physical activity in large-scale studies.     

Physical fitness and academic achievement in third- and fifth-grade students

The relationship between physical fitness and academic achievement has received much attention owing to the increasing prevalence of children who are overweight and unfit, as well as the inescapable pressure on schools to produce students who meet academic standards. This study examined 259 public school students in third and fifth grades and found that field tests of physical fitness were positively related to academic achievement. Specifically, aerobic capacity was positively associated with achievement, whereas BMI was inversely related. Associations were demonstrated in total academic achievement, mathematics achievement, and reading achievement, thus suggesting that aspects of physical fitness may be globally related to academic performance in preadolescents. The findings are discussed with regards to maximizing school performance and the implications for educational policies.     

Why Olympia matters for modern sport

From the modern scientific perspective, Olympia is a ruin at the far end of a fading sense of history that represents little more than the origins from which sport has continuously evolved. Quantitative measurements show continued increases in human performance, equipment efficiency and funding. But some question this athletic evolution. We worry about qualitative issues, such as virtue, meaning and beauty. The source of this contrast is a difference in values: Olympic vs. Efficiency values. Such values establish an ethos in sporting communities that influences how we behave, explain and even conceptualize our activities. I argue from the perspectives of metaphysics, epistemology, aesthetics, ethics and politics, that Olympic Ethos is needed to balance out the modern Efficiency Ethos, which threatens to dehumanize sport.     

Aspirational Reflections: The Future of Sport History

Abstract

This article provides a scrambled form of SWOT analysis of the ideas contained in the various contributions to this special issue on sport historians and the field of sport history. The market for sport history, pure and simple, is not in good shape in many places. Yet we must be careful not to confuse trends in employment prospects with shorter term fluctuations in demand. Nor should we conflate national issues with the international situation. One thing is certain: worldwide academia is expanding; surely, there must be opportunities somewhere for sport history. Sport historians may have to be prepared to move geographically or to get a job. Nonetheless, the field of sport history also has many strengths highlighted, and opportunities abound for collaborations, public engagement, and supporting our fellow sport historians across the globe. Instead of allowing the external threats and weaknesses to continue to grow, sport historians should draw on the encouraging aspects contained herein and take advantage of our field’s strengths and opportunities to develop new and creative initiatives which demonstrate the vibrancy and breadth of sport history.     

Creating the KM mindset: why is it so difficult?

Knowledge Management Research & Practice - The knowledge management (KM) mindset is a precursor to a knowledge-sharing culture. It is often assumed that developing a KM mindset is somewhat...