Functional Movement ScreenTM total score does not present a gestalt measure of movement quality in youth athletes

We aimed to evaluate the internal consistency and factor structure of the Functional Movement Screen (FMS^TM) in youth athletes and quantify differences between individual task score at different stages of maturation. FMS^TM and anthropometric variables were measured in 144 youth athletes (96 female, 48 male). Biological maturation was categorised as before- (<-0.5 years), at- (?0.49–0.50 years) and after- peak height velocity [PHV] (>0.51 years). Internal consistency was poor (Cronbach’s alpha; 0.53, ±90% confidence limit 0.10; ordinal alpha 0.6, ±0.09). Principle component analysis extracted two components, representing 47% of the total variance. Tasks loading highest on component 1 required stability, while those loading highest on component 2 favoured mobility. “Likely” decrements in component 1 tasks were observed before-PHV. In-line lunge (effect size ±90% confidence limit; ?0.47, ±0.49), hurdle step (?0.38, ±0.49), and trunk stability push-up (?0.51, ±0.45), were lower compared with athletes at-PHV and rotatory stability (?0.44, ±0.37) was lower than those after-PHV. Boys’ scored “most likely”, higher (0.73, ±0.28) in trunk stability push-up, and girls “likely” higher in shoulder mobility (0.46, ±0.29). In our population, the FMS^TM is not uni-dimensional, thus total score should be avoided. Clear maturation affects were observed in stability tasks.     

Rousseau’s Crusoe myth: the unlikely provenance of the neoclassical homo economicus

The neoclassical homo economicus has escaped the narrow confines of economic theory and is today embodied countless times over in the everyday behaviour that so much of the modern economy is set up precisely to serve. Not all of the authors of leading books on economic principles have named the neoclassical homo economicus, but when they have done so it is overwhelmingly in the same way. They have given him the human form of a Robinson Crusoe figure, despite the fact that his behavioural motivations and his practical conduct owe next-to-nothing to Daniel Defoe’s original characterisation. I suggest that the route to today’s cultural familiarity with the neoclassical homo economicus instead passes through the entirely unwitting hands of Jean-Jacques Rousseau. He substituted Defoe’s account of the castaway’s continuing deference to prevailing social norms with his own idealised vision of how the individual might use solitude to escape the corrupting influences of modern society. It is altogether another desocialised individual also bearing the Crusoe name who has latterly shaped many of the economics textbooks’ renderings of the neoclassical homo economicus. However, we can get to him only by first understanding the essential features of Rousseau’s Crusoe myth.     

The impact of uphill cycling and bicycle suspension on downhill performance during cross-country mountain biking

ABSTRACT

Non-propulsive work demand has been linked to reduced energetic economy of cross-country mountain biking. The purpose of this study was to determine mechanical, physiological and performance differences and observe economy while riding a downhill section of a cross-country course prior to and following the metabolic “load” of a climb at race pace under two conditions (hardtail and full suspension) expected to alter vibration damping mechanics. Participants completed 1 lap of the track incorporating the same downhill section twice, under two conditions (hardtail and full suspension). Performance was determined by time to complete overall lap and specific terrain sections. Power, cadence, heart rate and oxygen consumption were sampled and logged every second while triaxial accelerometers recorded accelerations (128 Hz) to quantify vibration. No differences between performance times (P = 0.65) or power outputs (P = 0.61) were observed while physiological demand of loaded downhill riding was significantly greater (P < 0.0001) than unloaded. Full suspension decreased total vibrations experienced (P < 0.01) but had no effect on performance (P = 0.97) or physiological (P > 0.05) measures. This study showed minimal advantage of a full suspension bike in our trial, with further investigations over a full race distance warranted.     

Seniors’ organizations in China’s new rural reconstruction: experiments in Hubei and Henan

This article tracks the shifting cultural meanings that the East/West distinction has produced in the history of nationalism in colonial and post-colonial India. It does so by focusing on the word “civilization” and the role it played in promoting a rich sense of inter-cultural dialogue in the writings of nationalist leaders such as Swami Vivekananda, Mahatma Gandhi, Rabindranath Tagore, and Jawaharlal Nehru. The article documents how the word figures with much reduced significance in contemporary cultural debates about globalization in India and concludes by asking if the rise of China and India to global prominence holds the potential today to initiate a conversation across cultures similar to the one that accompanied the rise of the West in the age of modern imperial rule.     

Sport stadia governance

This case concerns the fictional city of Urbanville, the state capital of Northern Australia, a pseudonym for one of Australia's eight States and Territories, where the State and municipal governments have decided to invest $600 M in the construction of a new sport stadium. The case explores the question of how the stadium will be governed once it has been constructed. The case outlines the key issues and challenges posed by Urbanville's existing sport stadia infrastructure; current issues among stakeholders and their use of existing stadia in Urbanville; and possible choices for the governance arrangements of the new stadium.     

Modifying landing mat material properties may decrease peak contact forces but increase forefoot forces in gymnastics landings

This study investigated how changes in the material properties of a landing mat could minimise ground reaction forces (GRF) and internal loading on a gymnast during landing. A multi-layer model of a gymnastics competition landing mat and a subject-specific seven-link wobbling mass model of a gymnast were developed to address this aim. Landing mat properties (stiffness and damping) were optimised using a Simplex algorithm to minimise GRF and internal loading. The optimisation of the landing mat parameters was characterised by minimal changes to the mat's stiffness (<0.5%) but increased damping (272%) compared to the competition landing mat. Changes to the landing mat resulted in reduced peak vertical and horizontal GRF and reduced bone bending moments in the shank and thigh compared to a matching simulation. Peak bone bending moments within the thigh and shank were reduced by 6% from 321.5 Nm to 302.5Nm and GRF by 12% from 8626 N to 7552 N when compared to a matching simulation. The reduction in these forces may help to reduce the risk of bone fracture injury associated with a single landing and reduce the risk of a chronic injury such as a stress fracture.     

Control is the key: Unlocking the motivation of at‐risk students

Traditional instructional environments for at‐risk (i.e., unmotivated) students are teacher controlled and provide low‐level, routine tasks. This, however, contradicts current theory and research regarding environments that enhance motivation to learn. To effectively assist motivationally disadvantaged students, instructional environments must support autonomy and challenge. Six “at‐risk” students in an alternative education program completed motivation surveys after engaging in various learning activities. Overall, the participants completed 54 surveys. Using multiple regression, involvement, boredom, confusion, competence, and desire to be doing something else were regressed on perceived challenge and perceived control. The results indicated that control and challenge were significant predictors of the motivation variables. The findings are discussed in terms of awakening to the powerful influence of instructional tasks on student motivation and desire to engage in learning activities. Limitations of the present study provide insights into future endeavors. © 1999 John Wiley & Sons, Inc.