全文获取类型
收费全文 | 1356篇 |
免费 | 37篇 |
国内免费 | 2篇 |
专业分类
教育 | 876篇 |
科学研究 | 55篇 |
各国文化 | 28篇 |
体育 | 237篇 |
文化理论 | 15篇 |
信息传播 | 184篇 |
出版年
2023年 | 12篇 |
2022年 | 11篇 |
2021年 | 19篇 |
2020年 | 44篇 |
2019年 | 53篇 |
2018年 | 106篇 |
2017年 | 107篇 |
2016年 | 92篇 |
2015年 | 59篇 |
2014年 | 54篇 |
2013年 | 346篇 |
2012年 | 63篇 |
2011年 | 48篇 |
2010年 | 30篇 |
2009年 | 41篇 |
2008年 | 39篇 |
2007年 | 40篇 |
2006年 | 32篇 |
2005年 | 25篇 |
2004年 | 24篇 |
2003年 | 23篇 |
2002年 | 16篇 |
2001年 | 8篇 |
2000年 | 3篇 |
1999年 | 4篇 |
1998年 | 8篇 |
1997年 | 10篇 |
1996年 | 4篇 |
1995年 | 4篇 |
1994年 | 3篇 |
1993年 | 7篇 |
1992年 | 2篇 |
1991年 | 2篇 |
1990年 | 3篇 |
1989年 | 5篇 |
1988年 | 2篇 |
1987年 | 5篇 |
1986年 | 3篇 |
1985年 | 3篇 |
1982年 | 3篇 |
1981年 | 3篇 |
1980年 | 4篇 |
1978年 | 2篇 |
1974年 | 2篇 |
1973年 | 3篇 |
1971年 | 2篇 |
1969年 | 2篇 |
1956年 | 2篇 |
1935年 | 1篇 |
1862年 | 1篇 |
排序方式: 共有1395条查询结果,搜索用时 15 毫秒
991.
Matthew Kleinman 《Research quarterly for exercise and sport》2013,84(4):672-677
Abstract Eighty male college students were divided into two experimental groups practicing three criterion tasks: the floor kip, the front hip circle mount on the low horizontal bar, and the glide kip on the low horizontal bar. These tasks were practiced under different conditions of massed or distributed practice and an ANCOVA was used to test for significant mean differences in the rates of learning between the experimental groups on each task. The subjects' performance on the Metheny-Johnson test served as the control variable in the analysis and the .05 level of significance was selected. All observed differences in mean rates of acquisition between groups were within the limits of chance on all tasks, regardless of the method of practice. This apparent lack of effect of distribution of practice was attributed to factors such as the pacing of the task, the discrete and complex, rather than continuous, nature of the task, and the learning-performance distinction. 相似文献
992.
John G. Morris Trish Gorely Matthew J. Sedgwick Alan Nevill Mary E. Nevill 《Journal of sports sciences》2013,31(12):1280-1293
Abstract The study investigated the effect of a school-based healthy lifestyles intervention on physical activity and dietary variables. In total 378 children (177 intervention, 201 control; age 9.75 ± 0.82 years (mean ± s)) took part in the 7-month intervention comprising: preparation for and participation in 3 highlight events (a dance festival, a walking event and a running event); an interactive website for pupils, teachers and parents; and vacation activity planners. Primary outcome measures were objectively measured physical activity (pedometers and accelerometers), endurance fitness and dietary variables. Multi-level modelling was employed for data analysis. The increase in physical activity was greater in the intervention group than the control group (steps: 1049 vs 632 daily steps each month; moderate to vigorous physical activity (MVPA) total: 4.6 min · day?1 · month?1 vs 1.3 min · day?1 · month?1; MVPA bouts: 5.4 min · day?1 · month?1 vs 2.6 min · day?1 · month?1; all P < 0.05). The increase in multi-stage fitness test distance was greater for intervention participants (46 vs 29 m · month?1 of intervention, group × month interaction, P < 0.05). There were no differences between groups in dietary variables, body composition, knowledge of healthy lifestyles or psychological variables. Thus an intervention centred around highlight events and including relatively few additional resources can impact positively on the objectively measured physical activity of children. 相似文献
993.
C. Matthew Laurent Michael C. Meyers Clay A. Robinson Lorna R. Strong Charles Chase Beelee Goodwin 《Journal of sports sciences》2013,31(7):709-716
Abstract The aim of this study was to assess and compare the validity of the portable VmaxST telemetry metabolic measurement device with that of a standard measurement system (Vmax29). Thirty asymptomatic, moderately active males provided written, informed consent and completed two maximal graded treadmill exercise tests (Bruce) using the VmaxST and the Vmax29 metabolic measurement systems. Tests were performed in random order on separate days to obtain peak values for time to exhaustion, heart rate, systolic and diastolic blood pressure, oxygen consumption ([Vdot]O2), carbon dioxide production ([Vdot]CO2), ventilation ([Vdot] E), and respiratory exchange ratio (RER). Multivariate analysis of variance revealed no significant main effect (P = 0.88) between the two systems across any variable, suggesting similar measurement capabilities between the two systems. Linear regression analyses revealed moderate to high coefficients of determination for [Vdot]O2 (r 2 = 0.99), [Vdot]CO2 (r 2 = 0.99), [Vdot] E (r 2 = 0.99), and RER (r 2 = 0.89). Furthermore, Bland-Altman analyses demonstrated that the VmaxST yielded similar values to the Vmax29, suggesting good agreement between the two systems. Agreement was confirmed when the differences between the methods resulted in a small range as identified by the 95% limits of agreement. Findings from the current study confirm that the VmaxST is a valid device for measuring metabolic and physiological variables during exercise within a controlled laboratory setting. 相似文献
994.
Nathaniel D.M. Jenkins Matthew J. Hawkey Pablo B. Costa Ryan E. Fiddler Brennan J. Thompson Eric D. Ryan 《Journal of sports sciences》2013,31(6):612-617
Abstract We compared starters and non-starters for various isokinetic strength variables in elite women’s soccer players. A convenience sample of 10 starters (mean ± s; age = 20 ± 2 years; height = 170 ± 4 cm; body mass = 65 ± 5 kg) and 7 non-starters (age = 20 ± 1 years; height = 164 ± 3 cm; body mass = 63 ± 4 kg) performed maximal voluntary muscle actions of the leg extensors (concentric) and flexors (eccentric) on an isokinetic dynamometer in order to measure concentric peak torque for the leg extensors, eccentric peak torque for the leg flexors, and the functional hamstrings:quadriceps (H:Q) ratio at 1.047 rad · s-1 and 4.189 rad · s-1 concentric peak torque for the leg extensors was not different between starters and non-starters. However, it was greater at 1.047 rad · s-1 than at 4.189 rad · s-1 in both groups. Eccentric peak torque for the leg flexors was greater for the starters versus non-starters at 4.189 rad · s-1. Eccentric strength of the leg flexors at fast movement velocities may be used as an effective physiological profile and may discriminate between playing status in elite women’s soccer players. 相似文献
995.
Jill Holm-Denoma April Smith Matthew Waesche 《Research quarterly for exercise and sport》2013,84(3):420-425
Abstract This investigation was conducted in order to determine if there were differences in the degree to which accuracy in throwing with the nonpreferred hand was developed when practice with projectiles of varying weights was used during the learning period. The effects of transfer of learning from the throwing of a ball of one weight to performance with a ball of another weight was also studied. The result indicated that practice with a light ball was as effective as practice with a heavier ball in developing skill to throw a heavier ball. Practice with the heavier ball when transferred to the lighter ball did not demonstrate a corresponding effect. 相似文献
996.
Abstract The objective of this study was to analyse the correctness of the offside judgements of the assistant referees during the final round of the FIFA 2002 World Cup. We also contrasted two hypotheses to explain the errors in judging offside. The optical error hypothesis is based on an incorrect viewing angle, while the flash-lag hypothesis refers to perceptual errors associated with the flash-lag effect (i.e. a moving object is perceived as spatially leading its real position at a discrete instant signalled by a briefly flashed stimulus). Across all 64 matches, 337 offsides were analysed using digital video technology. The error percentage was 26.2%. During the first 15 min match period, there were significantly more errors (38.5%) than during any other 15 min interval. As predicted by the flash-lag effect, we observed many more flag errors (86.6%) than non-flag errors (13.4%). Unlike the predictions of the optical error hypothesis, there was no significant difference between the correct and incorrect decisions in terms of the positioning of the assistant referees relative to the offside line (0.81 and 0.77 m ahead, respectively). To reduce the typical errors in judging offside, alternative ways need to be considered to teach assistant referees to better deal with flash-lag effects. 相似文献
997.
Abstract The purpose of this study was to examine the accuracy of the ePulse Personal Fitness Assistant, a forearm-worn device that provides measures of heart rate and estimates energy expenditure. Forty-six participants engaged in 4-minute periods of standing, 2.0 mph walking, 3.5 mph walking, 4.5 mph jogging, and 6.0 mph running. Heart rate and energy expenditure were simultaneously recorded at 60-second intervals using the ePulse, an electrocardiogram (EKG), and indirect calorimetry. The heart rates obtained from the ePulse were highly correlated (intraclass correlation coefficients [ICCs] ≥0.85) with those from the EKG during all conditions. The typical errors progressively increased with increasing exercise intensity but were <5 bpm only during rest and 2.0 mph. Energy expenditure from the ePulse was poorly correlated with indirect calorimetry (ICCs: 0.01–0.36) and the typical errors for energy expenditure ranged from 0.69–2.97 kcal · min?1, progressively increasing with exercise intensity. These data suggest that the ePulse Personal Fitness Assistant is a valid device for monitoring heart rate at rest and low-intensity exercise, but becomes less accurate as exercise intensity increases. However, it does not appear to be a valid device to estimate energy expenditure during exercise. 相似文献
998.
This article explores the role of Prince Alexandre de Merode in heading the IOC's fight against drugs from the 1960s to 2002. History has not served de Merode very well. He has been presented in simplistic ways that emerge from context rather than evidence – as either a saint or a sinner. IOC-sanctioned accounts cast him inthe mould of the saint: a moral and intelligent man who saved sports from doping. In contrast, sports academics have tended to portray him as a sinner: an ineffectual leader who did not develop either the testing systems or the punishments required to prevent doping and who deliberately concealed evidence of high-profile doping cases. This article assesses both representations before presenting information to support a richer and more complicated interpretation. 相似文献
999.
Teachers’ beliefs have a considerable impact on their instructional styles, methods, objectives and curricular organization. The primary purpose of this study was to investigate the influence of two preservice teachers’ (PTs’) value orientations on their interpretation and delivery of sport education (SE). A secondary purpose was to describe possible changes and development of PTs’ value orientations while teaching SE. Data were collected while they engaged in their final student teaching experience using a variety of qualitative techniques. These were analyzed using standard interpretive techniques. Results indicated that their disciplinary mastery focus strongly influenced the type of SE seasons they delivered. In addition they revealed that the PTs broadened their beliefs about their teaching toward the end of student teaching to the extent that they expressed interest in goals related to and used pedagogies consistent with social reconstruction, social responsibility and self-actualization value orientations. 相似文献
1000.
C. Matthew Lee Mark Gorelick 《Measurement in physical education and exercise science》2013,17(1):18-25
The purpose of this study was to examine the validity of the Smarthealth watch (Salutron, Inc., Fremont, California, USA), a heart rate monitor that includes a wristwatch without an accompanying chest strap. Twenty-five individuals participated in 3-min periods of standing, 2.0 mph walking, 3.5 mph walking, 4.5 mph jogging, and 6.0 mph running. Heart rate was simultaneously measured and recorded at 60-sec intervals using three methods: the Smarthealth wristwatch, the Polar Vantage XL monitor with an accompanying chest strap (Kempele, Finland), and an electrocardiograph, which served as the criterion method. The heart rates obtained from the Smarthealth watch were highly correlated with those from the electrocardiograph (r ≥ .95) and the standard error of estimate was below 5 bpm for all measurements. Additionally, correlation coefficients and standard errors of estimate between the Smarthealth watch and Polar heart rate monitor were ≥.97 and <3.7 bpm, respectively. However, the Smarthealth watch exhibited a reduced ability to detect a heart rate during the 4.5 and 6.0 mph conditions compared to the Polar heart rate monitor (6% and 13.9% reduced ability, respectively). The Smarthealth watch appears to be a valid device for monitoring heart rate while standing and during treadmill exercise involving walking and jogging in a healthy young adult sample, although it may not be able to consistently detect a heart rate when body motion is excessive. 相似文献