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11.
Ajit M.W. Chaudhari Steven T. Jamison Michael P. McNally Xueliang Pan Laura C. Schmitt 《Journal of sports sciences》2013,31(14):1333-1340
AbstractAthletes at high risk of groin strains in sports such as hockey and soccer often choose to wear shorts with directional compression to aid in prevention of or recovery from hip adductor strains. Large, eccentric contractions are known to result in or exacerbate strain injuries, but it is unknown if these shorts have a beneficial effect on hip adductor muscle activity. In this study, surface electromyography (EMG) of the adductor longus and ground reaction force (GRF) data were obtained simultaneously on 29 healthy individuals without previous history of serious injury while performing unanticipated 45° run-to-cut manoeuvres in a laboratory setting wearing shorts with non-directional compression (control, HeatGear, Under Armour, USA) or shorts with directional compression (directional, CoreShort PRO, Under Armour, USA), in random order. Average adductor activity in the stance leg was significantly lower in the directional condition than in the control condition during all parts of stance phase (all P < 0.042). From this preliminary analysis, wearing directional compression shorts appears to be associated with reduced stance limb hip adductor activity. Athletes seeking to reduce demand on the hip adductors as they approach full return to activities may benefit from the use of directional compression shorts. 相似文献
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Frank I. Michel Kai-Uwe Schmitt Richard M. Greenwald Kelly Russell Frank I. Simpson David Schulz Mike Langran 《Sports Engineering》2013,16(4):197-210
The wrist is the most frequently injured body region among snowboarders. Studies have shown that the risk of sustaining a wrist injury can be reduced by wearing wrist protection. Currently, there are a wide variety of wrist protection products for snowboarding on the market that offer a range of protective features. However, there are no minimum performance standards for snowboarding wrist protectors worldwide. The International Society for Skiing Safety convened a task force to develop a White Paper to evaluate the importance and necessity of a minimum performance for all wrist protectors used in snowboarding. The White Paper outlines the need for a general framework for a harmonized international standard and reviews the existing evidence. Therefore, this White Paper may serve as a common base for future discussions. The broader goal of developing and implementing such a standard is to reduce the incidence and the severity of wrist injuries in snowboarding without increasing the risk of adverse events, such as upper arm or shoulder injury. The European standard for inline skating wrist protectors (EN 14120) can serve as a starting point for efforts related to a standard for snowboard wrist protectors, but certain modifications to the standard would be required. It is hypothesized that implementation of a snowboarding wrist protector standard would result in fewer and less severe wrist injuries in the sport and could translate into more riding days for healthy snowboarders and significant health-care costs savings. 相似文献
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This study explored the development of meta‐cognitive knowledge and control, the relationship between the two constructs, the types of strategy knowledge Chinese students consider valuable and comparisons with US children's knowledge of strategies at the third‐grade level. One hundred and twenty students were randomly sampled from third‐, fifth‐ and seventh‐grade classes in China. Control was operationalised as comprehension monitoring and measured with CLOZE and Error Detection tasks, while awareness comprised declarative knowledge of strategies and was measured using an interview and a questionnaire. The findings indicated that knowledge of strategies and meta‐cognitive control develop over time, but knowledge develops at a faster rate in comparison. The evaluation of the relationships between the constructs suggested that the measurement format affected the students' accessibility of the declarative knowledge. The Chinese students demonstrated similarities in their knowledge of useful strategies, with previewing and activating background knowledge as the most valued strategies. 相似文献
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The purpose of this paper is to review ten actions that can be taken by multi- disciplinary child protection teams or individuals in this field to assure that the interests of the abused child are consistently addressed. 相似文献
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