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排序方式: 共有175条查询结果,搜索用时 15 毫秒
91.
Mathieu C. Morissette Nicolas Murray Julie Turmel Julie Milot Louis-Philippe Boulet 《European Journal of Sport Science》2016,16(5):569-576
Objectives: This study aimed to evaluate the levels of 8-isoprostane (8-IsoP) in the airways of competitive swimmers at baseline and after a swimming session according to their airway responsiveness. Methods: Twenty-three swimmers and six lifeguards had a baseline spirometry and bronchoprovocative challenges. During a second visit, swimmers performed a usual swimming session while lifeguards stayed in the same pool environment for the same time period. Forced expiratory volume in one second (FEV1) was measured before and 5 min after the end of the session. Exhaled breath condensate (EBC) was sampled before and 10 min after the session and EBC 8-IsoP levels were analysed by enzyme immunoassay. Change in EBC 8-IsoP from baseline to post-swimming session was calculated. Results: We observed no relationships between airway hyper-responsiveness and 8-IsoP values before or after swimming in swimmers. The levels of 8-IsoP were significantly higher after the training session (mean value 2.9, s?=?0.5 pg?mL?1) than at baseline (mean value 1.9, s?=?0.4 pg?mL?1) in swimmers only (p?=?.012). EBC 8-IsoP levels after the swimming session significantly correlated with the percent change in FEV1 after swimming. Conclusions: EBC 8-IsoP levels were increased after training in swimmers but not in lifeguards, suggesting that exercise-induced hyperpnoea in a chlorinated pool environment increases airways oxidative stress. 相似文献
92.
93.
This experiment was designed to investigate whether and how decreasing the amount of attentional focus invested in postural control could affect bipedal postural control. Twelve participants were asked to stand upright as immobile as possible on a force platform in one control condition and one cognitive condition. In the latter condition, they performed a short-term digit-span memory task. Decreased center-of-gravity displacements and decreased center-of-foot-pressure displacements minus center-of-gravity displacements were observed in the cognitive condition relative to the control condition. These results suggest that shifting the attentional focus away from postural control by executing a concurrent attention-demanding task could increase postural performance and postural efficiency. 相似文献
94.
Michel Nicolas Guillaume Martinent Guillaume Millet Virginie Bagneux Marvin Gaudino 《Journal of sports sciences》2019,37(16):1831-1839
This research examined the time courses of emotions in sport settings (anxiety, dejection, anger, happiness, excitement) experienced by mountain ultra-marathon (MUM) runners within the month following a demanding MUM race and the role of emotional intelligence (EI) in these time courses. A six-wave one-month longitudinal design was used with one measurement point within two days before the race to measure EI and five time points within the month following the race to assess emotions experienced among a sample of 29 runners. Results of multilevel growth curve analyses showed significant linear decreases of dejection and anxiety and a significant linear increase of anger. EI was related to the intercept (level at the end of the MUM race) of happiness, excitement and dejection. Moreover the interaction of EI with time was associated with happiness, excitement and anger. This means that high and low emotional intelligent runners exhibited distinct trajectories of emotional intelligence within the month following the MUM race. Indeed, trait-EI appeared to have a protective role against stress process leading to emotional adjustment within the recovery period following an ultra-endurance event. As such, consultants and coaches could conduct specific program over the sport season designed to enhance trait-EI of MUM runners. 相似文献
95.
Code of practice for the pastoral care of international students: making a globalising industry in New Zealand 总被引:1,自引:0,他引:1
Nicolas Lewis 《Globalisation, Societies & Education》2005,3(1):5-47
Export education in New Zealand has grown rapidly since 1990, earning significant foreign exchange and underwriting the finance of domestic education. As principal owner of education institutions, the national state is the primary investor. Previous governments treated the ‘industry’ as both windfall and cash‐cow as they advanced the neo‐liberal project of disentangling state from economy and making education providers self‐regulating. The current ‘Third Way’ inspired government has adopted a more prominent management interest in the making of this globalising industry. A new Code of Practice enacts multiple technologies of control from quality control to standard setting, benchmarking, certification and audit. Legitimated by a discourse of concern for the pastoral care of school‐aged students, it requires institutions to provide detailed information. The Code makes ‘the industry’ visible, makes a market, controls brand NZ education, regulates through consumer assurance, and imposes direct disciplinary controls on institutions. The Code of Practice makes apparent the ambitions and governmental technologies of the ‘augmented’ neo‐liberal state, and is a pivotal structure in the constitution of the industry and of the globalising processes that define it. The paper uses governmentality analysis to uncover these technologies of control and to consider their part in the constitution of both industry and globalisation. 相似文献
96.
97.
Magnetophoretic manipulation in microsystem using carbonyl iron-polydimethylsiloxane microstructures
Magalie Faivre Renaud Gelszinnis Jér?me Degouttes Nicolas Terrier Charlotte Rivière Rosaria Ferrigno Anne-Laure Deman 《Biomicrofluidics》2014,8(5)
This paper reports the use of a recent composite material, noted hereafter i-PDMS, made of carbonyl iron microparticles mixed in a PolyDiMethylSiloxane (PDMS) matrix, for magnetophoretic functions such as capture and separation of magnetic species. We demonstrated that this composite which combine the advantages of both components, can locally generate high gradients of magnetic field when placed between two permanent magnets. After evaluating the magnetic susceptibility of the material as a function of the doping ratio, we investigated the molding resolution offered by i-PDMS to obtain microstructures of various sizes and shapes. Then, we implemented 500 μm i-PDMS microstructures in a microfluidic channel and studied the influence of flow rate on the deviation and trapping of superparamagnetic beads flowing at the neighborhood of the composite material. We characterized the attraction of the magnetic composite by measuring the distance from the i-PDMS microstructure, at which the beads are either deviated or captured. Finally, we demonstrated the interest of i-PDMS to perform magnetophoretic functions in microsystems for biological applications by performing capture of magnetically labeled cells. 相似文献
98.
Nicolas Souchon Genevieve Cabagno Alan Traclet David Trouilloud Gregory Maio 《Journal of sports sciences》2013,31(7):695-700
Abstract The influence of players' standard of competition on referees' decision making was investigated. Standard of competition was examined by studying 30 handball matches, 15 at League and 15 at National standard. At both standards, we examined two types of refereeing decision (sporting and disciplinary) after transgressions that varied in ambiguity. The results indicated that referees made more lenient decisions at higher standards of competition, but this tendency depended on the type of decision being made and ambiguity in the offence. The hypothesis that referees use standard of competition as a judgemental heuristic, but in varying ways, was supported. 相似文献
99.
Nicolas Delorme 《Journal of sports sciences》2013,31(1):16-21
AbstractThe aim of this study was to investigate whether weight categories prevent young athletes from being exposed to a relative age effect. The dates of birth of all French female (n = 727) and male (n = 5440) amateur boxers who participated in the 2010–2011 season were collected from the federation database. The dates of birth of all French male professional boxers (n = 354) were also collected. The results show an absence of a relative age effect among French female and male amateur boxers. The results also show an absence of this phenomenon among French male professional boxers. The male 18–18+ age category reveal an inverse relative age effect. This inverse relative age effect might be interpreted as the result of a strategic adaptation from relatively younger children who shift from one sport to another where there are weight categories in order to ensure fair competition. The results of this study suggest that the weight category system is a possible solution within the relative age effect phenomenon. 相似文献
100.
The winner’s curse is a well-known phenomenon in the auction theory. The main aim of this article is to verify its existence in football broadcasting rights. The underlying objective is to assess whether some indices of this situation are verified and can cause a winner’s curse. The methodology is based on the application of Andreff (2014)’s six indices and a seventh index (disappointment) to the domestic markets for broadcasting rights of the French and English football leagues. These two markets have seen an increase in the number of packages offered to broadcasters, with the possibility of several ‘winners’. The article shows that the winner of the major packages in the auction is not cursed. The curse is more likely to happen for the second mover. As such, the article suggests a practical recommendation for broadcasters interested in football rights: win the best package or keep away. 相似文献