Inspiratory muscle warm-up and inspiratory muscle training: separate and combined effects on intermittent running to exhaustion     

Lomax M  Grant I  Corbett J 《Journal of sports sciences》2011,29(6):563-569

In the present study, we examined the independent and combined effects of an inspiratory muscle warm-up and inspiratory muscle training on intermittent running to exhaustion. Twelve males were recruited to undertake four experimental trials. Two trials (Trials 1 and 2) preceded either a 4-week training period of 1 × 30 breaths twice daily at 50% (experimental group) or 15% (control group) maximal inspiratory mouth pressure (PImax). A further two trials (Trials 3 and 4) were performed after the 4 weeks. Trials 2 and 4 were preceded by a warm-up: 2 × 30 breaths at 40% PImax. Pre-training PImax and distance covered increased (P < 0.05) similarly between groups after the warm-up (~11% and ~5-7% PImax and distance covered, respectively). After training, PImax increased by 20 ± 6.1% (P < 0.01; d = 3.6) and 26.7 ± 6.3% (P < 0.01; d = 3.1) when training and warm-up were combined in the experimental group. Distance covered increased after training in the experimental group by 12 ± 4.9% (P < 0.01; d = 3.6) and 14.9 ± 4.5% (P < 0.01; d = 2.3) when training and warm-up interventions were combined. In conclusion, inspiratory muscle training and inspiratory muscle warm-up can both increase running distance independently, but the greatest increase is observed when they are combined.  相似文献   

Nature Enthusiasm,Social Planning and Eugenics in Australian State Schools, 1900‐1920     

Grant Rodwell 《Journal of educational administration and history》1997,29(1):1-19

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Children versus Childhood: Writing Children into the Historical Record, or Reflections on Paula Fass's Encyclopedia of Children and Childhood in History and Society     

Julia Grant 《History of education quarterly》2005,45(3):468-490

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IV. CLASSICS: A CONVERSATION PIECE     

Michael Grant 《Higher Education Quarterly》1955,9(2):153-167

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PUBLIC OPINION AND THE TRANSFORMATION OF THE SOVIET UNION     

Dobson  Richard B.; Grant  Steven A. 《Int. Journal of Public Opinion Research》1992,4(4):302-320

This article examines the relationship between public opinionand the transformation of the Soviet Union. Results of an August1990 survey showed that the majority of adults supported democraticreform, but lacked confidence in the Soviet regime. Young andmiddle-aged people, urban residents, and those with higher educationtended to be more supportive of democratic reform and more alienatedfrom the regime. The nationalities differed widely in supportfor democratic reform and confidence in the regime. In the partlydemocratized political system, Boris Yeltsin acquired a broadfollowing by appealing to the electorate and advocating radicalchange. A February 1991 poll showed that his support was greatestamong Russians who backed the Russian parliament and stronglyendorsed democratic reform and private enterprise. With suchbacking, Yeltsin won the June 1991 Russian presidential electionand then mobilized popular opposition to the August coup attempt.The coup's failure dealt a fatal blow to Communist rule, Gorbachev'sleadership, and the Soviet Union itself.  相似文献   

Time motion analysis of 2001 and 2002 super 12 rugby     

Duthie G  Pyne D  Hooper S 《Journal of sports sciences》2005,23(5):523-530

The aim of this study was to quantify movements of Super 12 rugby players in competition because information on elite rugby players' movements is unavailable. Players were categorized into forwards [front (n = 16) and back row (n = 15)] and backs [inside (n = 9) and outside backs (n = 7)] and their movements analysed by video-based time motion analysis. Movements were classified as rest (standing, walking and jogging) and work (striding, sprinting, static exertion, jumping, lifting or tackling). The total time, number and duration of individual activities were assessed, with differences between groups evaluated using independent sample t-tests (unequal variances), while differences between halves were assessed with paired sample t-tests. Forwards had 7:47 min:s (95% confidence limits: 6:39 to 8:55 min:s, P<0.01) more time in static exertion than backs, but backs spent 0:52 (0:34 to 1:09, P = 0.01) min:s more time sprinting than forwards, and had a 0.7 (0.3 to 1.2, P = 0.01) s longer duration of each sprint. Forwards spent 7:31 (5:55 to 9:08) min:s more time in work activities (P = 0.01) and had 2.1 (1.3 to 2.8) s longer work durations (P<0.01) than backs. The results indicate frequent short duration (<4 s) work efforts followed by moderate duration (<20 s) rest for forwards, and extended (>100 s) rest duration for backs. High-intensity efforts involved static exertion for forwards (mean +/- standard deviation frequency = 80 +/- 17) and sprinting for backs (27 +/- 9). In conclusion, after nearly a decade since becoming professional, elite rugby union is still characterized by highly intense, intermittent movement patterns and marked differences in the competition demands of forwards and backs.  相似文献   

EditorialKeeping information centre stage amid changing scenery     

Maria J Grant 《Health information and libraries journal》2010,27(2):91-92

With conference season upon us, consideration is given to the importance of subject‐specific and library association conferences. The biennial Health Libraries Group (HLG) conference meets both these criteria and takes place in Greater Manchester in July. The conference provides an opportunity for peer‐to‐peer learning, identifying new trends and professional rejuvenation. An open invitation is given to attend the Health Information and Libraries Journal‘Writing for Publication’ workshop at the HLG conference. An overview of three bursaries available from the Health Libraries Group and Library and Information Research, both groups of the UK Chartered Institute of Library and Information Professionals (CILIP) is provided. The bursaries offer opportunities to cover the costs of registration and travel expenses to national and international conference.  相似文献   

Young offenders in New South Wales,Australia and the need for remedial sexual health education     

Grant Mistler  Kristie Kirkwood  Emily Potter 《Sex education》2013,13(4):439-449

The 2005–2008 Australian National Sexually Transmissible Infections Strategy identifies young people as a key target group in need of sexual health education, screening and management. For young people who are in contact with the New South Wales (NSW) juvenile justice system, a dire need for remedial sexual health education exists. NSW young offenders indicate initiation of sexual activity at a younger age than their peers, higher numbers of sexual partners, infrequent condom use and higher rates of sexually transmitted infections. They also report family instability, poor accessing of health services, and low school attendance: all factors that result in poor sexual knowledge and health outcomes. An examination into the cognitive profile of these young offenders indicates remedial education for this group may require a dual approach in order to redress their specific circumstances and needs. The first approach should target young offenders who simply missed out on stages of sexual health information in the school curriculum. The second approach requires a tailored teaching methodology more appropriate for a group with atypical cognitive profiles. Both approaches need to engage an educative model that acknowledges that these disadvantaged young people are already sexual active; and that many did not have the benefit of an informed or consensual decision making processes. More importantly, the tailoring of a sexual health education program to these young people needs to resonate with teaching to a cognitively distinctive population who have experienced higher than usual rates of alcohol and other drugs abuse, and higher than usual episodes of physical and emotional abuse and neglect.  相似文献   

Fact or folklore? Exploring “Myths” about outdoor education accidents: Some evidence from New Zealand     

Grant Davidson 《Journal of Adventure Education & Outdoor Learning》2013,13(1):13-37

Abstract

This paper provides analysis on the frequency and nature of accidents and near accidents that have occurred in larger outdoor education centres in New Zealand. This is the first time that information of this type has been collected and analysed in New Zealand.

All 25 of the known outdoor education organisations employing three or more full-time staff were invited to participate in a study that would extract and review data from their records about accidents and near accidents. Twelve agreed to participate.

The data collected is analysed in the context of various myths that are often heard referred to by the outdoor education community. These are that: 1. i.focusing on minor incidents prevents major accidents occurring,

2. ii.selecting activities with high perceived risk but low real risk reduces exposure to accidents,

3. iii.more accidents occur while under the supervision of male rather than female instructors,

4. iv.accidents are more likely in the afternoon than the morning, and

5. v.outdoor education is dangerous compared to other risks in life.

The results lend some support to the factual nature of “myths” iii and iv, but help consign “myths” i, ii and v to the category of folklore. These results provide insights that may assist in developing strategies to improve safety in outdoor education.

In view of the current size and importance of the outdoor education sector in New Zealand and its likely future growth, one of the main recommendations arising from this study is for the establishment of a national system to formally record and report incidents and accidents.  相似文献   

Mixed Mode Latent Class Analysis: An Examination of Fit Index Performance for Classification     

Grant B. Morgan 《Structural equation modeling》2013,20(1):76-86

This Monte Carlo study examines the performance of fit indices commonly used by applied researchers interested in finite mixture modeling for the purposes of classification. Conditions for the simulation study were selected to reflect conditions found in applied educational and psychological research. The factors included in the investigation were metric level of indicators, sample size, and class prevalence. All models contained a combination of categorical and continuous indicators. All categorical indicators were dichotomous, and continuous indicators were normally distributed. The fit indices examined were Akaike’s information criterion, Bayesian information criterion (BIC), sample size-adjusted Bayesian information criterion (SSBIC), integrated classification likelihood criterion with Bayesian-type approximation, and Lo–Mendell–Rubin likelihood ratio test. Overall, SSBIC tended to identify the correct solution with higher frequency than other indices. BIC tended to identify the correct solution with higher frequency than the other indices in models with more continuous than categorical indicators, or when rare classes were absent.  相似文献