排序方式： 共有9条查询结果，搜索用时 15 毫秒
1
1.
Eric T. Trexler Erica J. Roelofs Katie R. Hirsch Meredith G. Mock 《European Journal of Sport Science》2016,16(6):702-710
Caffeine and coffee are widely used among active individuals to enhance performance. The purpose of the current study was to compare the effects of acute coffee (COF) and caffeine anhydrous (CAF) intake on strength and sprint performance. Fifty-four resistance-trained males completed strength testing, consisting of one-rep max (1RM) and repetitions to fatigue (RTF) at 80% of 1RM for leg press (LP) and bench press (BP). Participants then completed five, 10-second cycle ergometer sprints separated by one minute of rest. Peak power (PP) and total work (TW) were recorded for each sprint. At least 48 hours later, participants returned and ingested a beverage containing CAF (300?mg flat dose; yielding 3–5?mg/kg bodyweight), COF (8.9?g; 303?mg caffeine), or placebo (PLA; 3.8?g non-caloric flavouring) 30 minutes before testing. LP 1RM was improved more by COF than CAF (p?=?.04), but not PLA (p?=?.99). Significant interactions were not observed for BP 1RM, BP RTF, or LP RTF (p?>?.05). There were no sprint?×?treatment interactions for PP or TW (p?>?.05). 95% confidence intervals revealed a significant improvement in sprint 1 TW for CAF, but not COF or PLA. For PLA, significant reductions were observed in sprint 4 PP, sprint 2 TW, sprint 4 TW, and average TW; significant reductions were not observed with CAF or COF. Neither COF nor CAF improved strength outcomes more than PLA, while both groups attenuated sprint power reductions to a similar degree. Coffee and caffeine anhydrous may be considered suitable pre-exercise caffeine sources for high-intensity exercise. 相似文献
2.
理想的图书馆员和信息专家的素质与形象 总被引：46，自引：2，他引：44
论述图书情报工作所需的知识、技能和道德。附录部分引介了美国专门图书馆协会提交的“21世纪专门图书馆员必备的素质”的报告。 相似文献
3.
Erica J. Roelofs Eric T. Trexler Katie R. Hirsch Meredith G. Mock 《European Journal of Sport Science》2017,17(3):317-325
The effects of pomegranate extract (PE) supplementation were evaluated on high-intensity exercise performance, blood flow, vessel diameter, oxygen saturation (SPO2), heart rate (HR), and blood pressure (BP). In a randomized, crossover design, nineteen recreationally resistance-trained participants were randomly assigned to PE (1000?mg) or placebo (PL), which were consumed 30?min prior to a repeated sprint ability (RSA) test and repetitions to fatigue (RTF) on bench and leg press. The RSA consisted of ten six-second sprints on a friction-loaded cycle ergometer with 30?s recovery. Brachial artery blood flow and vessel diameter were assessed by ultrasound. Blood flow, vessel diameter, SPO2, HR, and BP were assessed at baseline, 30?min post ingestion, immediately post exercise (IPost), and 30?min post exercise (30minPost). With PE, blood flow significantly increased IPost RSA (mean difference?=?18.49?mL?min?1; P?<?.05), and IPost and 30minPost RTF (P?<?.05) according to confidence intervals (CI). Vessel diameter increased significantly 30minPost RSA according to CI and resulted in a significant interaction IPost and 30minPost RTF (P?<?.05). With PE, according to CI, average and peak power output increased significantly in sprint 5 of the RSA (P?<?.05). There was no significant difference between PE and PL for bench (P?=?.25) or leg press (P?=?.15) repetitions. Acute PE supplementation enhanced vessel diameter and blood flow, suggesting possible exercise performance enhancement from increased delivery of substrates and oxygen. The acute timing and capsule form of PE may be advantageous to athletic populations due to ergogenic effects, taste, and convenience. 相似文献
4.
Douglas Fuchs Devery Mock Paul L. Morgan Caresa L. Young 《Learning disabilities research & practice》2003,18(3):157-171
Longstanding concern about how learning disabilities (LD) are defined and identified, coupled with recent efforts in Washington, DC to eliminate IQ‐achievement discrepancy as an LD marker, have led to serious public discussion about alternative identification methods. The most popular of the alternatives is responsiveness‐to‐intervention (RTI), of which there are two basic versions: the “problem‐solving” model and the “standard‐protocol” approach. The authors describe both types, review empirical evidence bearing on their effectiveness and feasibility, and conclude that more needs to be understood before RTI may be viewed as a valid means of identifying students with LD. 相似文献
5.
6.
7.
迎接新千年到来的图书馆 总被引：58，自引：7，他引：51
从印刷媒体与电子媒体、实体图书馆与虚拟图书馆、信息技术、知识与信息、图书馆员5个方面论述未来的图书馆事业;介绍并分析国内外一些学者在未来图书馆存亡问题上的争论与主张;阐述图书馆在知识时代中的新使命;提出实体图书馆与虚拟图书馆共存、印刷型文献与电子出版物共存等观点,特别强调未来的图书馆“不是没有围墙的图书馆,而是超越围墙的图书馆”的观点。 相似文献
8.
Henry O. Hart Harold D. Lasswell Stephen L. Vaughn Mock Larson Oswald H. Ganley 《Communication Booknotes Quarterly》2013,44(8):163-165
Henry 0. Hart's Mass Communication and Social Change Process and Practice (An Attempted Extension of Basic Models) (East European Area Audience and Opinion Research Dept., RFE/RL, Inc., Oettingenstrasse, 67 AM Englischen Garten, 8000 Munich 22, West Germany—apparently free on request, paper) World Directory of Mass Communication Periodicals ($15.00) Mass Communication Research–Current Documentation ($10.00 per volume) Directory of Mass Media Research Centres in European Socialist Countries ($5.00) Harold D. Lasswell, Daniel Lerner and Hans Speier, eds. Propaganda and Communication in World History, Volume II: Emergence of Public Opinion in the West (Honolulu: University of Hawaii Press, 1980-825.00) Stephen L. Vaughn's Holding Fast the Inner Lines: Democracy, Nationalism, and the Committee on Public Information (Chapel Hill: University of North Carolina Press, 1980—$21.00) Mock and Larson's Words That Won the War (1939) Oswald H. Ganley's The United States-Canadian Communications and Information Resources Relationship and its Possible Significance for Worldwide Diplomacy (Working Paper W-79-7, November 1979—$10.90, paper, 97 pp.) Anthony Crawford's Posters of World War I and World War II in the George C. Marshall Research Foundation (Charlottesville, Virginia: University Press of Virginia, 1979—$9.95) 相似文献
9.
何以成为真正的图书馆员 总被引：27，自引：0，他引：27
“真正的图书馆员”是指完全具备专业或职业素养的图书馆员,其中隐含着“图书馆员这一职业是一种专门职业”的内涵。图书馆职业资质由专业资质、个人资质和核心资质构成。一个真正的图书馆员应该具备专业资质、职业使命、继续学习、专业团体、职业伦理、个人品质、价值观这七种素质。图2。参考文献31。 相似文献
1