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在欧洲战场,持续烧钱的切尔西终于如愿地捧得了欧洲冠军杯;在英超,凭着阿布扎比财团无限的财力,曼城终于重温了44年的联赛冠军梦;而在中超,房地产的热钱助推升班马恒大毫无悬念地拿下了冠军。 相似文献
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AbstractThe consistency of community size effects in North American contexts but not elsewhere, reinforces the notion that the effect is driven by socio-cultural factors specific to the country under examination. In order to identify and understand the various forces driving the community size effect, it is important to determine whether the effect has changed over time. Stability or instability over time would assist researchers in identifying the specific socio-cultural mechanisms driving these effects. This study compared the influence of community size on the likelihood of being drafted into the National Hockey League (NHL) among Canadian ice hockey players drafted to play in the NHL between 1985 and 2009. Although there was some variability over the timespan examined, most notably in communities with between 250,000 and 499,999 inhabitants and over 1,000,000 inhabitants, trends were generally stable over time, suggesting that the socio-cultural mechanisms may have also been relatively stable, although further work is necessary to confirm this assumption. 相似文献
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For Canadians, the enduring late nineteenth- and early twentieth-century debate between adherents of sustained British imperialism and those champions of Canadian sovereignty closed in December 1964 by dint of a Canadian Parliamentary act establishing a new national symbol, one that henceforth removed the British ensign from national flag and federal governmental identifications and replaced it with a simple red maple leaf embossed on a white background between two panels of red. This is the primary identification symbol, the logo, indeed the brand, by which Canada is now recognized throughout the world. The birth of the red maple leaf logo's legitimization in both national and international context points to a role played by the Canadian Olympic Committee, the embryo saga of which was superimposed on the initiatives of the nation's first Olympic team, the aggregation of male athletes that competed in the London Games of 1908. This work argues that the introduction of the red maple leaf as a national symbol of Canada, with respect to the logo's initial international debut at the Games of the Fourth Olympiad celebrated in London in 1908, provided the first in a series of succeeding international Olympic occurrences that lent sustenance to a greater Canadian movement towards neoliberal promoted national self-identity and a commensurate beginning of the erosion of what most Canadians would refer to as ‘Britishness’. 相似文献
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洪友廉 《山东体育学院学报》2007,23(4):1-6
One of the challenges faced by aging people is de-creased postural stability and increased risks for falls.Thereis general agreement that postural control involves manysen-sory and motor systems,and a number of investigators havefound that ageis relatedto declinesin visual,vestibular,andsensorimotor functions[1].With increasing age,the timerequired to process and integrate sensory information andmotor reactionincreases[2].Proprioception,the afferent infor-mationregarding body position and bala… 相似文献
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This paper argues that recent treatments of ethics in sport have accorded too much importance to the promotion and portrayal of a sport’s excellences, and too little to the consent of participants First, I consider and reject a fundamental challenge to the idea that consent should play a central role in determining the morality of action in sport – namely, Sean McAleer’s argument to the effect that consent is incapable of rendering normally impermissible actions permissible in sport. I then offer a preliminary examination of the proper relation in the moral evaluation of action in sport between considerations of consent and ‘internalist’ considerations regarding the nature and purpose of sport. Taking as my starting point J.S. Russell’s treatment of this topic, I argue that consent is the more weighty, and in many cases the more fundamental, value and that when it conflicts with internalist considerations, it is consent that takes moral priority. 相似文献
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《European Journal of Sport Science》2013,13(2):61-85
Abstract Cadence is one of the only variables cyclists can adjust to manage their performance and fatigue during an event. Not surprisingly, cadence has received a great deal of attention from the scientific community in an effort to identify the cadence that optimizes power output while minimizing the fatigue that is incurred. The literature appears to present conflicting results with little consensus as regards the optimal pedalling cadence. This is in large part due to the inconsistent definition of the term “optimal” cadence, which has been used to describe energetic cost, muscular stress, and perception of effort. The issue is further confounded by the workload-dependent nature of the “optimal” cadence – that is, at higher power outputs, the optimized cadence is different from that at lower power outputs. Although the optimal cadence is different for energetic, muscular, and perceptual definitions, the curves that describe the effect of changes in cadence on these variables consistently exhibit a J-shaped response. This suggests that there is an underlying principle that is common to each of the definitions. Indeed, it would appear that the response of both the cardio-respiratory system (energetic cost) and the muscular system (muscular stress) is determined by the types of muscle motor units that are recruited during the exercise. Furthermore, although part of the response may be due to the inherent differences in the characteristics between the different motor units, the absolute contraction velocity relative to fibre type optimum may be of greater significance. Even when the power output is increased, the shape of the response curves to changes in cadence remains constant, although the nadir of the curve does shift to the right for increasing power outputs. We propose that the point at which the energetic vs. power and the muscular stress vs. power curves intercept is defined by the cadence at which the perceived effort is minimized (i.e. the preferred cadence). However, cadence fluctuations occur under field conditions that are unrelated to physiological factors and, therefore, the ability to identify an “optimal” cadence is limited to the laboratory environment and specific field conditions. 相似文献
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Dr. Leon E. Smith 《Research quarterly for exercise and sport》2013,84(1):191-197
Abstract Forearm flexion strength of 65 college men was measured at two distances from the elbow at each of three angles of the forearm. The speed of forearm flexion movement was measured through an arc of 85°. Ebel intraclass reliabilities for strength and speed were high, i.e., .95 to .99. The extremely low correlations between limb strength and speed of movement, which ranged from —.06 to .14, are in agreement with the majority of the low correlations reported in earlier studies. The findings of this study support the theory of specificity in that individual differences in the speed of a limb involving a single joint are predominantly independent of strength measures associated with that limb and joint. 相似文献
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Numerous events have provided evidence that the cultural values and assumptions of intercollegiate athletic departments are often incongruent with those of their host institutions. This discrepancy has even been evident in Christian institutions which seek to integrate faith into the learning experience. Using the organizational culture perspective, this study sought to determine how religion influenced the culture of one intercollegiate athletics department. The study took place at a highly selective evangelical Christian college with a nationally competitive athletic department. Data were collected through interviews with 19 campus leaders, observation of cultural events and document analysis. Analysis occurred qualitatively through a process of theorizing. The results indicate that evangelical Christianity played a significant role in the athletic department's culture by constraining its membership, influencing its pedagogy and guiding department decisions. As a result, its values and assumptions were consistent with those of the overall campus culture. The reasons underlying this cultural integration offer coaches and administrators of all institutional affiliations the possibility that the organizational culture perspective can be used to create athletic programs that are more consistent with institutional values. 相似文献
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Abstract The purpose of this study was to establish percentile norms and to compare skinfold and other anthropometric measurements of 647 Italian, Jewish, and Negro preadolescent boys from the Boston, Massachusetts area. Skinfolds were measured at five sites. Other measurements included height, weight, bi-iliac diameter, and selected girths. Correlations were determined between skinfolds and selected body build components. Interskinfold r's ranged from moderate to high values. The largest percentile scores were found within the Jewish group. Analysis of variance was employed to compare the body fat, height, and weight of each group. Significant differences were found relative to certain skinfolds and weight between ethnic groups at the 1 percent level. 相似文献
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Veronica Son Ben Jackson J. Robert Grove Deborah L. Feltz 《Journal of sports sciences》2013,31(13):1417-1424
Abstract Before completing a team-based dart-throwing activity, 80 undergraduates were randomly assigned to one of three pre-performance self-talk conditions: (a) self-talk statements that focused upon one's personal capabilities, (b) self-talk statements emphasizing the group's capabilities, or (c) a control condition where neutral statements were implemented. Participants in all conditions subsequently rated their confidence in their own (i.e. self-efficacy) as well as their team's (i.e. collective efficacy) capabilities, before carrying out the task. Overall, self-efficacy, collective efficacy, and performance indicators were all greatest for individuals who practised self-talk focusing on the group's capabilities, as opposed to individual-focused and neutral conditions. Findings are considered with respect to their novel theoretical contribution to the social cognition literature and their implications for fostering efficacy perceptions and team performance. 相似文献
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Jr.-Prof. Dr. H.E. Meier 《Sportwissenschaft》2011,41(4):300-314
The paper addresses the question whether the cooperative relationship between organized sport and state actors has left an impact on the legislative organization of sport policy-making. The idea of whether the Sport Committee of the Bundestag can be categorized as a constituency committee staffed mainly with lobbyists from the sport associations and backbenchers is examined. Empirical results for the hypotheses are mixed. Committee assignments and career trajectories show some features supporting the idea that membership in the Sport Committee is mainly interesting for legislators with a strong sport background. However, committee members have strong party ties suggesting that the committee is also of relevance for the political parties and is under party control. The Sport Committee member’s ties with the sport bodies indicate patterns of co-optation between sport and legislature. 相似文献
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John Lucas 《Research quarterly for exercise and sport》2013,84(1):41-47
Abstract The generality of the variability in practice prediction, arising from Schmidt's schema theory (1975) of motor learning was tested on young children. More specifically, the structure of the variability session and its subsequent influence on transfer performance to a novel variation of the task was examined. Children tossed a weighted bean bag to a fixed target location. Three groups experienced variability in practice with four bean bags of varying weights (3, 4, 5, and 6 oz.); however, the trial-by-trial presentation of each weight was different for each group. One group received a random presentation of each weight from trial to trial while another experienced random presentations of a weight for blocks of three trials. The third variability group received blocked practice with six trials per block for each weight. All variability groups experienced the same amount of practice at each weight. A constant practice group experienced only a single weight. Following 24 practice trials, all subjects transferred outside the range of previous experience, receiving three trials with one of two possible test weights (2 oz. or 7 oz.). The results indicated that the variability group practicing with blocks of three trials at each variation led to superior performance at transfer to novel variations of the task. Overall, the experiment suggested that transfer performance for children is affected by the appropriate structure of variable practice which formulates the schemata for movement production. 相似文献
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Abstract Waist girth is recognised as a better predictor of obesity, particularly abdominal obesity, compared to other measures. Although several protocols for waist girth exist, arm position is either ignored, or not specified in unambiguous terms. Therefore, the purpose of this study was to determine if arm position influenced anthropometric waist girth measurement. Waist girth was measured in 92 adults (19 males, 73 females) with arms relaxed, abducted, horizontal, folded across the chest (three variations) and raised vertically. Duplicate measures, in all positions, were recorded by a single International Society for the Advancement of Kinanthropometry (ISAK)-trained technician to a precision of 0.2% technical error of measurement (TEM). Arm position had a significant effect (P < 0.001) on waist girth. Male participants had greater waist girth than females (P < 0.001) and the waist girth differences across the varying arm positions exhibited a significant position-by-gender interaction (P < 0.001). The arm position-by-body mass index (BMI) category interaction was also significant (P = 0.016) with greater differences observed at higher BMI. These findings suggest caution in comparing results of different studies where arm position is not specified and indicate that the arm position corresponding to the ISAK protocol has the lowest error and is therefore recommended. 相似文献
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Paul S. Glazier 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(2):180-182
A proficient serve is critical to successful tennis performance, and consequently coaches and players devote considerable time refining this stroke. In so doing, a wide variety of interventions are used or trialled, generally with very little empirical support. This study examined the efficacy of a commonly used service intervention, where players focus on exaggerating their finish (arabesque) position to promote specific changes in lower limb and trunk kinematics. The kinematics of eight high-performance junior players hitting flat serves were compared to the acute changes in kinematics elicited by the arabesque follow through position on serves using a 10-camera VICON MX motion analysis system. The significantly greater front (landing leg) hip flexion (p < 0.05) and forward trunk flexion (p < 0.05) confirmed the more exaggerated arabesque landing position following the arabesque instruction. The arabesque instruction resulted in increased frontal plane trunk range of motion and peak angular velocity in the forward swing, and increased leg drive during the drive phase. Practically, the results support the use of the arabesque instruction, effectively promoting the desired acute changes in trunk kinematics (i.e. increased frontal plane trunk rotation angular velocity) and leg drive (i.e. increased back knee extension angular velocity and front/back vertical hip velocity). 相似文献
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Y. King Liu 《Research quarterly for exercise and sport》2013,84(2):178-179
Abstract Ages at menarche and selected menstrual characteristics in 204 nonathletes, 253 high school athletes, 386 college athletes, and 40 young top athletes of Japan were investigated by questionnaire. Data from the questionnaire have confirmed (a) the ascending trend of ages of menarche with advancement of training and competitive level, and (b) the diversity of mean age at menarche by sport in a given level. The menarcheal orders by sport in the literature have been found to be strikingly similar to those found in the present data. We offer the hypothesis that ages at menarche and selected menarcheal characteristics (a) are brought about by selection in the socialization process into sports participation, and (b) reflect the diversity of suitable physiques by sport. Also, the higher the training and competitive level, the more likely the occurrence of menstrual irregularity (cycle length and period duration) and/or dysmenorrhea (backache). 相似文献