Cardiorespiratory and perceptual responses of two interval training and a continuous training protocol in healthy young men     

João Pedro Araújo Naves  Ana Cristina Silva Rebelo  Lucas Raphael Bento E Silva  Maria Sebastiana Silva  Rodrigo Ramirez-Campillo  Robinson Ramírez-Vélez 《European Journal of Sport Science》2019,19(5):653-660

High Intensity Interval Training (HIIT) can be performed with different effort to rest time-configurations, and this can largely influence training responses. The purpose of the study was to compare the acute physiological responses of two HIIT and one moderate intensity continuous training (MICT) protocol in young men. A randomised cross-over study with 10 men [age, 28.3?±?5.5years; weight, 77.3?±?9.3?kg; height, 1.8?±?0.1?m; peak oxygen consumption (VO₂peak), 44?±?11?mL.kg^?1.min^?1]. Participants performed a cardiorespiratory test on a treadmill to assess VO₂peak, velocity associated with VO₂peak (vVO₂peak), peak heart rate (HRpeak) and perceived exertion (RPE). Then participants performed three protocols equated by distance: Short HIIT (29 bouts of 30s at vVO₂peak, interspersed by 30s of passive recovery, 29?min in total), Long HIIT (3 bouts of 4?min at 90% of vVO₂peak, interspersed by 3?min of recovery at 60% of vVO₂peak, 21?min in total) and MICT (21?min at 70% of vVO₂peak). The protocols were performed in a randomised order with ≥48 h between them. VO₂, HRpeak and RPE were compared. VO₂peak in Long HIIT was significantly higher than Short HIIT and MICT (43?±?11 vs 32?±?8 and 37?±?8?mL.kg^?1.min^?1, respectively, P?P?P?2, HR and RPE than Short HIIT and MICT, suggesting a higher demand on the cardiorespiratory system. Short HIIT and MICT presented similar physiologic and perceptual responses, despite Short HIIT being performed at higher velocities.  相似文献   

Effects of audiovisual stimuli on psychological and psychophysiological responses during exercise in adults with obesity     

Marcelo Bigliassi  João P. A. Greca  Vinícius Barreto-Silva  Priscila Chierotti  Arli R. de Oliveira  Leandro R. Altimari 《Journal of sports sciences》2019,37(5):525-536

The present experiment sought to further understanding of the effects of personalised audiovisual stimuli on psychological and psychophysiological responses during exercise in adults with obesity. Twenty-four participants (M_age = 28.3, SD = 5.5 years; M_BMI = 32.2, SD = 2.4) engaged in self-paced exercises on a recumbent cycle ergometer and three conditions (sensory stimulation [ST], sensory deprivation [DE], and control [CO]) were administered. Perceptual (attentional focus and perceived exertion), affective (affective state and perceived activation), and psychophysiological (heart rate variability) parameters were monitored throughout the exercise bouts. A one-way repeated measures analysis of variance was used to compare self-reported and psychophysiological variables (main and interaction effects [5 Timepoints × 3 Conditions]). The results indicate that ST increased the use of dissociative thoughts throughout the exercise session (η_p² = .19), ameliorated fatigue-related symptoms (η_p² = .15) and elicited more positive affective responses (η_p² = .12) than CO and DE. Accordingly, personally-compiled videos are highly effective in ameliorating exertional responses and enhancing affective valence during self-paced exercise in adults with obesity. Audiovisual stimuli could be used during the most critical periods of the exercise regimen (e.g., first training sessions) when individuals with obesity are more likely to focus on fatigue-related sensations.  相似文献   

A New Student Learning Focus for the Academic Library: From Geographical Proximity of the Learning Commons to Organizational Proximity within the Library     

Jo Ann F. Murphy 《图书馆管理杂志》2017,57(7):742-757

In 2015, student learning programs at the University of Saskatchewan moved organizationally to the university library. While these services resided physically in the library as part of the Learning Commons partnership, this recent change presents the library with a new focus and responsibility for broader student learning support and academic skill development. Highlighting examples of organizational integration of student learning support, this article uses a proximity perspective, suggesting that geographical proximity of services in the learning commons does not go far enough to achieve the deeper collaboration and integration necessary for holistic and integrated learning, and that organizational proximity is needed.  相似文献   

Cytocompatible cellulose nanofibers from invasive plant species Agave americana L. and Ricinus communis L.: a renewable green source of highly crystalline nanocellulose     

Evdokimova  Olga L.  Alves  Carla S.  Krsmanović Whiffen  Radenka M.  Ortega  Zaida  Tomás  Helena  Rodrigues  João 《Journal of Zhejiang University. Science. B》2021,22(6):450-461

In this study, the fibers of invasive species Agave americana L. and Ricinus communis L. were successfully used for the first time as new sources to produce cytocompatible and highly crystalline cellulose nanofibers. Cellulose nanofibers were obtained by two methods, based on either alkaline or acid hydrolysis. The morphology, chemical composition, and crystallinity of the obtained materials were characterized by scanning electron microscopy(SEM) together with energy-dispersive X-ray spectroscopy(EDX), dynamic light scattering(DLS), X-ray diffraction(XRD), and Fourier transform infrared(FTIR)spectroscopy. The crystallinity indexes(CIs) of the cellulose nanofibers extracted from A. americana and R. communis were very high(94.1% and 92.7%, respectively). Biological studies evaluating the cytotoxic effects of the prepared cellulose nanofibers on human embryonic kidney 293 T(HEK293 T) cells were also performed. The nanofibers obtained using the two different extraction methods were all shown to be cytocompatible in the concentration range assayed(i.e., 0-500 μg/mL). Our results showed that the nanocellulose extracted from A. americana and R. communis fibers has high potential as a new renewable green source of highly crystalline cellulose-based cytocompatible nanomaterials for biomedical applications.  相似文献   

Suitable work for women? Roles,relationships and changing identities of ‘other adults’ in the early years classroom     

Jo Barkham 《British Educational Research Journal》2008,34(6):839-853

This article explores some of the issues around the agenda for workforce reform as it applies to professionals who work in early years classrooms (4–7 year olds), who work alongside class teachers in supporting learning. Their changing roles, responsibilities and professional identities are examined through a small scale case study of four women, two nursery nurses and two teaching assistants, from an infants school in a suburb of Bristol. Their close professional and personal relationships with the six female class teachers with whom thery work are considered. Their stories are analysed for their significance as women whose levels of skill and dedication are undervalued in terms of career structure, salary and job security. Whilst contributing to the debates around the changing roles and the valuable work of teaching assistants, this research endorses the view that these professionals' voices are too often silenced in educational debates and in strategic decision making.  相似文献   

Literature Reviews and Academic Librarianship: The Review Editor's Perspective     

Jo Alcock 《New Review of Academic Librarianship》2016,22(4):351-354

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Reading: Parents and Pre-School     

Jo Weinberger 《Literacy》1988,22(3):164-167

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Reception Teacher Responses to the Foundation Stage Réactions des enseignants des premières classes du primaire à la phase de fondation Las Racciones de los Maestros del Primer Año (de un parvulario) respecto a la Etapa Preparatoria     

Iris Keating  Jo Basford  Elaine Hodson  Angela Harnett 《International Journal of Early Years Education》2002,10(3):193-203

Teachers of children aged four and five years in England (the Foundation Stage), since 2000, have been bound by the Curriculum Guidance produced by central UK Government. We were interested to learn of the responses of these teachers to this newly introduced document. We found that teachers welcomed the Foundation Stage Curriculum Guidance, not least because it recognised that there exists a valuable and separate stage in children's education. Further, the teachers were relieved that there was, within the document, the acknowledgement of the importance and value of play as integral to the educational needs of young children. The teachers indicated that the document was also beneficial in that it allowed them to return openly to what they felt to be sound Early Years practice which some had felt had been undermined by previous curriculum guidance. However, concerns remained in that not all stakeholders are yet aware of the needs of young children and of the resources necessary to meet these needs. En Angleterre, depuis 2000, les enseignants des enfants de quatre et cinq ans (phase dite de 'fondation') doivent se conformer à la Curriculum Guidance (Lignes directrices des programmes scolaires) produite par le gouvernement central du Royaume-Uni. Nous souhaitions connaître les réactions de ces enseignants face à ce nouveau document. Nous avons constaté que les enseignants accueillent favorablement la Foundation Stage Curriculum Guidance tant elle reconnaît l'existence d'une phase utile et distincte d'assimilation chez les enfants. En outre, les enseignants ont été soulagés de constater que la document reconnaît l'importance et l'utilité du jeu comme faisant partie intégrante des besoins éducatifs des jeunes écoliers. Ils ont également fait savoir qu'ils trouvent ce document utile dans la mesure où il leur permet de revenir ouvertement à des pratiques qu'ils considèrent comme étant saines pendant les premières années scolaires des enfants et qui, selon certains, avaient été amoindries par les lignes directrices des programmes scolaires précédents. Ils s'avèrent néanmoins toujours préoccupés du fait que toutes les parties prenantes ne sont pas encore conscientes des besoins des jeunes enfants et des ressources nécessaires pour les satisfaire. Desde el año 2000, en Inglaterra, los profesores de niños de la edad de 4 y 5 años (la Etapa de Fundación) han tenido que conformar con las reglas de curriculum introducidas por el gobierno central del Reino Unido. Tuvimos interes de enterarnos de las respuestas de aquellos profesores a ese documento nuevo. Encontramos que los profesores estan de acuerdo con la 'Guía de Curriculum de la Etapa de Fundación', por lo menos porque reconoció que existe una etapa válida y aparte en la educación de niños. Además estuvieron contentos que el documento reconició la importancia y validez de juegos infántiles imprescindible en el desarrollo del niño. Los profesores indicáron que el documento fue beneficioso también porque les permitió volver abiertamente a lo que sentieron que fueron 'prácticas sanas' de los años primeros que algunos de ellos pensaron que habían estado desacreditadas por las 'Guías de Curriculum' previas. No obstante quedan preocupaciónes que algunos interesados todavía no estan enterados de lo que los niños necesitan y los recursos que hacen falta.  相似文献   

Effects of Academic Discipline and Teaching Goals in Predicting Grading Beliefs Among Undergraduate Teaching Faculty     

Barnes  Laura L. B.  Bull  Kay S.  Campbell  N. Jo  Perry  Katye M. 《Research in higher education》2001,42(4):455-467

Prior research reveals that differential grading patterns exist among the academic disciplines. One explanation may lie in discipline-related differences in teaching goals and beliefs about the meaning grades should convey. This study examined the effects of academic discipline and teaching goals on grading beliefs. A national sample (n = 442) of undergraduate teaching faculty provided responded to a survey measuring the importance of various teaching goals and orientations toward norm-referenced or criterion-referenced grading (Frame of Reference), and beliefs about using grades to sort and select students on the basis of achievement (Gatekeeping). Both teaching goals and academic discipline were significantly related to gatekeeping beliefs, but not to beliefs about frames of reference for grading. Higher gatekeeping scores were associated with faculty in the paradigmatic fields and those who emphasized analytic skills and time management. Lower gatekeeping scores were associated with the preparadigmatic disciplines and teaching goals of synthesis and integration and developing respect for others. Faculty who identified their primary teaching role as subject matter oriented were more gatekeeping than those who identified themselves primarily as being student/personal development oriented.  相似文献   

Nurturing Emergent Readers Through Readers Theater     

Kelli Jo Kerry Moran 《Early Childhood Education Journal》2006,33(5):317-323

Readers theater is a familiar literacy strategy for children who can read independently; however, it can also be used with younger children who have not yet developed independent reading skills. The purpose of this article is to adapt the concept of readers theater for use with emergent readers. It focuses first on defining readers theater and its many benefits, particularly in the areas of literacy development. Finally, it includes suggestions for successfully implementing a readers theater program with young children.  相似文献