全文获取类型
收费全文 | 5829篇 |
免费 | 49篇 |
国内免费 | 5篇 |
专业分类
教育 | 4320篇 |
科学研究 | 356篇 |
各国文化 | 113篇 |
体育 | 373篇 |
综合类 | 4篇 |
文化理论 | 58篇 |
信息传播 | 659篇 |
出版年
2020年 | 54篇 |
2019年 | 99篇 |
2018年 | 103篇 |
2017年 | 161篇 |
2016年 | 133篇 |
2015年 | 99篇 |
2014年 | 110篇 |
2013年 | 1449篇 |
2012年 | 121篇 |
2011年 | 107篇 |
2010年 | 101篇 |
2009年 | 121篇 |
2008年 | 139篇 |
2007年 | 127篇 |
2006年 | 115篇 |
2005年 | 111篇 |
2004年 | 111篇 |
2003年 | 107篇 |
2002年 | 95篇 |
2001年 | 62篇 |
2000年 | 74篇 |
1999年 | 60篇 |
1998年 | 64篇 |
1997年 | 70篇 |
1996年 | 74篇 |
1995年 | 69篇 |
1994年 | 76篇 |
1993年 | 71篇 |
1992年 | 70篇 |
1991年 | 76篇 |
1990年 | 76篇 |
1989年 | 76篇 |
1988年 | 66篇 |
1987年 | 60篇 |
1986年 | 69篇 |
1985年 | 55篇 |
1984年 | 61篇 |
1983年 | 85篇 |
1982年 | 60篇 |
1981年 | 60篇 |
1980年 | 66篇 |
1979年 | 58篇 |
1978年 | 80篇 |
1977年 | 63篇 |
1976年 | 49篇 |
1975年 | 51篇 |
1973年 | 45篇 |
1970年 | 48篇 |
1969年 | 38篇 |
1966年 | 39篇 |
排序方式: 共有5883条查询结果,搜索用时 0 毫秒
121.
Max R. Paquette Brian K. Schilling Joshua D. Bravo Shelby A. Peel Yuhua Li Robert J. Townsend 《Research quarterly for exercise and sport》2017,88(1):44-51
Understanding the effects of training in different footwear on sporting performance would be useful to coaches and athletes. Purpose: This study compared the effects of computerized agility training using 3 types of footwear on change-of-direction and balance performance in young adults. Method: Thirty recreationally active young adults (Mage = 22.8 ± 3.1 years; Mheight = 1.71 ± 0.7 m; Mbodymass = 73.4 ± 10.3 kg) were randomly assigned to a 6-week computerized agility training intervention in 1 of 3 footwear groups (n = 10/group): barefoot, minimal footwear, or traditional shoes. Participants had no previous barefoot or minimal-footwear training experience. Dependent variables included change-of-direction test time to completion, Star Excursion Balance Test, and single-leg stability evaluation. Testing was performed at the start of the training program, after 2 weeks, after 4 weeks, and at the end of the training program. Results: No group or time interactions were found for any of the dependent variables. Time main effects were observed for the performance measures of change of direction, Star Excursion, and single-leg-with-eyes-open stability evaluation. Participants improved in all 3 tests as early as 2 weeks into the intervention, with improvements continuing through the entire 6-week intervention. Conclusions: The lack of interaction and footwear effects suggests that agility and balance improvements during foot agility training are independent of footwear in a recreationally active young-adult population. Computerized agility training improves change-of-direction and balance performance within 2 weeks of training implementation. Future studies should consider footwear training effects in different populations, including frail older adults and athletes. 相似文献
122.
123.
124.
125.
Tennis featured in every Olympics from 1896 to 1924, after which disagreements between the International Olympic Committee (IOC) and the International Lawn Tennis Federation (ILTF) on matters pertaining to organisational control and the amateur eligibility of players led to tennis being removed from the Olympic Games as a full-medal event until the 1988 Seoul Olympics. This paper traces the steps of the sport’s reinstatement, from when efforts commenced in the 1950s, setting this development in the contexts of: broader political movements, shifting IOC leadership, burgeoning commercialisation of Olympic sport, the concomitant push for professionalisation and the declining influence of amateur ideals within both the Olympic movement and international tennis. Under the leadership of the amateur stalwart Avery Brundage, the IOC stymied attempts to facilitate tennis’s re-entry, challenging both the ILTF on failing to deal with widespread ‘sham-amateur’ practices and the avaricious promoters luring amateur players toward the professional ranks. Brundage and the IOC also strongly condemned the move to ‘open’ tennis and an acceptance of full-blown professionalism. Only a change in leadership, firstly with Lord Killanin and then the progressive reformer Juan Antonio Samaranch, did the IOC recognise the value of tennis within the Olympic movement, which by then had itself become increasingly money-oriented. 相似文献
126.
Nicholas Tam Devon R. Coetzee Safwaan Ahmed Robert P. Lamberts Yumna Albertus-Kajee Ross Tucker 《European Journal of Sport Science》2017,17(9):1220-1229
Introduction: Many factors may contribute to running-related injury. These include fatigue and footwear, the combination of which has rarely been studied, in particular with reference to barefoot running, recently advocated as a method to reduce injury risk. Methods: Twenty-two runners (12 well-trained and 10 trained) participated in a 10?km fatiguing trial. Knee and ankle joint kinematics and kinetics and electromyography were assessed during overground running in the barefoot and shod condition. This was performed pre- and post-fatigue using a motion capture system and force platforms. Results: Initial loading rate increased in the trained runners when barefoot but not shod. Shod knee stiffness increased in both groups after fatigue, whereas barefoot knee stiffness decreased only in the trained group. A reduction in barefoot bicep femoris pre-activation was found in both groups. During stance, a reduction in vastus lateralis and biceps femoris and an increase in tibialis anterior activity were found over time in both groups and conditions. Trained runners decreased gluteus medius and increased lateral gastrocnemius median frequency for both conditions after fatigue. Conclusion: When fatigued, gait adjustments in habitually shod runners may increase injury risk when running barefoot. Training status may be a risk factor for injury, as less-trained runners experience muscular fatigue changes that may compromise ground reaction force attenuation. Caution is recommended when transitioning to pure barefoot running. 相似文献
127.
Robert Munro 《Cultural Trends》2015,24(3):276-280
128.
129.
130.