Training the inspiratory muscles improves running performance when carrying a 25 kg thoracic load in a backpack     

Mark A. Faghy  Peter I. Brown 《European Journal of Sport Science》2016,16(5):585-594

Load carriage (LC) exercise in physically demanding occupations is typically characterised by periods of low-intensity steady-state exercise and short duration, high-intensity exercise while carrying an external mass in a backpack; this form of exercise is also known as LC exercise. This induces inspiratory muscle fatigue and reduces whole-body performance. Accordingly we investigated the effect of inspiratory muscle training (IMT, 50% maximal inspiratory muscle pressure (P_Imax) twice daily for six week) upon running time-trial performance with thoracic LC. Nineteen healthy males formed a pressure threshold IMT (n?=?10) or placebo control group (PLA; n?=?9) and performed 60?min LC exercise (6.5?km?h^–1) followed by a 2.4?km running time trial (LC_TT) either side of a double-blind six week intervention. Prior to the intervention, P_Imax was reduced relative to baseline, post-LC and post-LC_TT in both groups (pooled data: 13?±?7% and 16?±?8%, respectively, p?P_Imax increased +31% (p?TT (+18%, p?P_Imax at each time point was unchanged (13?±?11% and 17?±?9%, respectively, p?>?.05). In IMT only, heart rate and perceptual responses were reduced post-LC (p?p?相似文献   

Bullying on the school bus: deleterious effects on public school bus drivers     

Alan K. Goodboy  Matthew M. Martin  Elizabeth Brown 《Journal of Applied Communication Research》2016,44(4):434-452

Bullying is a serious communication problem facing teachers, administrators, parents, and students alike. Although much research has examined bullying intervention and prevention efforts in schools, bullying on the bus has received little empirical attention, even though victimization regularly occurs in this school-related environment. The purpose of this study was to examine how bus drivers are affected by student bullying during their routes. Participants included 117 public school bus drivers who reported on victimization from students during their bus route and resulting driver outcomes. Results of path analyses revealed significant mediation models; the bullying of bus drivers had effects on driver outcomes (i.e. anxious driving, occupational self-efficacy, emotional exhaustion, and cynicism) indirectly through its effects on job stress. Moreover, results of conditional process analyses revealed that these mediated effects were moderated by years of bus driving experience (i.e. moderated mediation); the indirect effects on driver outcomes were stronger for more experienced drivers.  相似文献   

The dilemma of fading food: An investigation into the light sensitivity of selected Ed Ruscha screenprints     

Laura Maccarelli  Heather Brown  Charlotte W. Eng 《文物保护研究》2016,61(3):308-310

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Impulsivity and modelling in hyperactive and normal children     

Ronald T. Brown 《International Journal of Disability, Development & Education》1980,27(2):79-87

This research tested the hypothesis that in hyperactive and normal children a cognitive modelling treatment procedure would produce improved scores on the Matching Familiar Figures Test (MFF), a primary index of impulsivity. The hypothesis was based on earlier findings that modelling was found to be a successful treatment procedure for eliminating other behaviour disorders. The hypothesis was verified in that the cognitive modelling procedure reduced the number of errors on the MFF. Based on the present research, it was recommended that future studies evaluate the efficacy of modelling techniques to problem solving tasks utilized in the school setting.  相似文献   

Taking Action on Usability Testing Findings: Simmons College Library Case Study     

Andrew R. Clark  Annie Erdmann  Jennifer Ferguson  Khalilah Gambrell  Jeremy B. Shaw-Munderback 《期刊图书馆员》2016,71(3-4):186-196

Simmons College Library conducted in-person and remote usability testing to observe how students retrieve full text when using Library Search, its discovery service system powered by EBSCO Discovery Service (EDS). Testing was conducted as a collaborative study with a consultant associated with EBSCO Information Services User Research Group. This testing found that students expect direct access to full text, have an unfavorable impression of Interlibrary Loan (ILL), and are unsure, based on terminology, which links provide direct access to full text. Steps taken by the library in response to the findings include local customization of EDS, improvements to ILL messaging, updates to user education regarding full text formats and terminology, and requests to EBSCO to update terminology to support users’ direct access to full text. Study findings also validated decisions the library made during the initial set up of its discovery service system.  相似文献   

Collegiate athletes and career identity     

Jennifer L. Murdock  Molly M. Strear  Michael A. Jenkins-Guarnieri  Angela C. Henderson 《Sport, Education and Society》2016,21(3):396-410

Given the unique experiences of collegiate athletes and the need to facilitate their transition as they complete postsecondary education and join the workforce, the present study sought to evaluate a group-administered career development program at a US university focused on preparing students for the transition into professional life upon graduation. Utilizing the quantitative portion of the Life After Sport Scale, we surveyed National Collegiate Athletic Association Division I student athletes to examine the relationship between attending the career intervention sessions and career-athlete identity. Results suggested that attending one or more program session workshops was not significantly related to career-athlete identity, while student gender had the strongest association with this potentially important construct in student athlete career development. Research and practice implications of these findings are discussed.  相似文献   

Fatigue detection in strength training using three-dimensional accelerometry and principal component analysis     

Niklas Brown  Sebastian Bichler  Meike Fiedler  Wilfried Alt 《Sports biomechanics / International Society of Biomechanics in Sports》2016,15(2):139-150

Detection of neuro-muscular fatigue in strength training is difficult, due to missing criterion measures and the complexity of fatigue. Thus, a variety of methods are used to determine fatigue. The aim of this study was to use a principal component analysis (PCA) on a multifactorial data-set based on kinematic measurements to determine fatigue. Twenty participants (strength training experienced, 60% male) executed 3 sets of 3 exercises with 50 (12 repetitions), 75 (12 repetitions) and 100%-12 RM (RM). Data were collected with a 3D accelerometer and analysed by a newly developed algorithm to evaluate parameters for each repetition. A PCA with six variables was carried out on the results. A fatigue factor was computed based on the loadings on the first component. One-way ANOVA with Bonferroni post hoc analysis was calculated to test for differences between the intensity levels. All six input variables had high loadings on the first component. The ANOVA showed a significant difference between intensities (p < 0.001). Post-hoc analysis revealed a difference between 100% and the lower intensities (p < 0.05) and no difference between 50 and 75%-12RM. Based on these results, it is possible to distinguish between fatigued and non-fatigued sets of strength training.  相似文献   

Effects of a minimalist shoe on running economy and 5-km running performance     

Joel T Fuller  Dominic Thewlis  Margarita D Tsiros  Nicholas A.T Brown  Jonathan D Buckley 《Journal of sports sciences》2016,34(18):1740-1745

The purpose of this study was to determine if minimalist shoes improve time trial performance of trained distance runners and if changes in running economy, shoe mass, stride length, stride rate and footfall pattern were related to any difference in performance. Twenty-six trained runners performed three 6-min sub-maximal treadmill runs at 11, 13 and 15 km·h^?1 in minimalist and conventional shoes while running economy, stride length, stride rate and footfall pattern were assessed. They then performed a 5-km time trial. In the minimalist shoe, runners completed the trial in less time (effect size 0.20 ± 0.12), were more economical during sub-maximal running (effect size 0.33 ± 0.14) and decreased stride length (effect size 0.22 ± 0.10) and increased stride rate (effect size 0.22 ± 0.11). All but one runner ran with a rearfoot footfall in the minimalist shoe. Improvements in time trial performance were associated with improvements in running economy at 15 km·h^?1 (r = 0.58), with 79% of the improved economy accounted for by reduced shoe mass (P < 0.05). The results suggest that running in minimalist shoes improves running economy and 5-km running performance.  相似文献   

Nurturing Careers in Psychology: Combining Work and Family   总被引：3，自引：3，他引：0  

Diane F. Halpern 《Educational Psychology Review》2008,20(1):57-64

The academic workplace, with its requirements for achieving tenure within the first 6 years of employment, is designed in ways that discriminate against young faculty with family care responsibilities, most notably mothers. Mason and Goulden (Academe, http://www.aaup.org/publications/Academe/2002/02nd/02ndmas.htm, 2002, Academe, http://www.aaup.org/publications/Academe/2004/04nd/04ndmaso.htm, 2004) found that women faculty who have babies within the first 5 years following the receipt of their doctorate are less likely to earn tenure than women without babies or men in general. Women at research-intensive universities are twice as likely as their male colleagues to report that they had fewer children than they wanted. In addition, only one-third of women who begin their academic career at research-intensive institutions without children will become a mother. These inequities, sometimes called the “baby gap” or “motherhood penalty” make academic institutions difficult places for new faculty with family care responsibilities. Suggestions are provided to assist new faculty in successfully combining their work and family roles (e.g., establish gender equity in parenting and negotiate for family-friendly policies) and to senior faculty and administrators who want to nurture the careers of their younger colleagues (e.g., support the use of family-friendly policies on campus).  相似文献   

Understanding Imaginative Thinking During Childhood: Sociocultural Conceptions of Creativity and Imaginative Thought   总被引：2，自引：0，他引：2  

Angela Eckhoff  Jennifer Urbach 《Early Childhood Education Journal》2008,36(2):179-185

Understanding imagination as both a cognitive and affective endeavor is crucial in order for educators to promote creative and imaginative thinking in informal and formal learning environments. It is the primary aim of this paper to develop the theoretical discussion of Vygotsky’s writings on young children’s imaginative abilities launched by Gajdamaschko (Teach Educ 16(1):13–22, 2005) and Lindqvist (Res J 15(2&3):245–251, 2003). This paper illustrates Vygotsky’s writings on the cognitive processes involved in children’s imagination and creativity and concludes with a discussion focused on the components of an educational environment that can either support or stifle children’s imaginative abilities. It is through this continuing discussion that, as researchers, we hope to extend and challenge current conceptions of the role of imaginative thinking in early education.  相似文献