Acute cardiovascular responses to interval exercise: A systematic review and meta-analysis     

Kym Joanne Price  Brett Ashley Gordon  Stephen Richard Bird  Amanda Clare Benson 《Journal of sports sciences》2020,38(9):970-984

ABSTRACT

Interval exercise training is increasingly recommended to improve health and fitness; however, it is not known if cardiovascular risk is different from continuous exercise protocols. This systematic review with meta-analyses assessed the effect of a single bout of interval exercise on cardiovascular responses that indicate risk of cardiac fibrillation and infarction compared to continuous exercise. Electronic databases Medline, CINAHL, Embase, Scopus and Cochrane were searched. Key inclusion criteria were: (1) intervals of the same intensity and duration followed by a recovery period and (2) reporting at least one of blood pressure, heart rate variability, arterial stiffness or function. Cochrane Risk of Bias tool and GRADE approach were used. Meta-analyses found that systolic blood pressure responses to interval exercise did not differ from responses to continuous exercise immediately (MD 8 mmHg [95% CI ?32, 47], p = 0.71) or at 60 min following exercise (MD 0 mmHg [95% CI ?2, 1], p = 0.79). However, reductions in diastolic blood pressure and flow-mediated dilation with interval exercise were observed 10–15 min post-exercise. The available evidence indicates that interval exercise does not convey higher cardiovascular risk than continuous exercise. Further investigation is required to establish the safety of interval exercise for clinical populations.  相似文献   

The American Way of Life: A Cultural History Lawrence R. Samuel. Fairleigh Dickinson University Press, 2017.          下载免费PDF全文

Stephen Curley 《Journal of American culture (Malden, Mass. : 2003)》2018,41(2):242-243

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How Haptics and Drawing Enhance the Learning of Anatomy     

Stephen Reid  Leonard Shapiro  Graham Louw 《Anatomical sciences education》2019,12(2):164-172

Students’ engagement with two-dimensional (2D) representations as opposed to three-dimensional (3D) representations of anatomy such as in dissection, is significant in terms of the depth of their comprehension. This qualitative study aimed to understand how students learned anatomy using observational and drawing activities that included touch, called haptics. Five volunteer second year medical students at the University of Cape Town participated in a six-day educational intervention in which a novel “haptico-visual observation and drawing” (HVOD) method was employed. Data were collected through individual interviews as well as a focus group discussion. The HVOD method was successfully applied by all the participants, who reported an improvement of their cognitive understanding and memorization of the 3D form of the anatomical part. All the five participants described the development of a “mental picture” of the object as being central to “deep learning.” The use of the haptic senses coupled with the simultaneous act of drawing enrolled sources of information that were reported by the participants to have enabled better memorization. We postulate that the more sources of information about an object, the greater degree of complexity could be appreciated, and therefore the more clearly it could be captured and memorized. The inclusion of haptics has implications for cadaveric dissection versus non-cadaveric forms of learning. This study was limited by its sample size as well as the bias and position of the researchers, but the sample of five produced a sufficient amount of data to generate a conceptual model and hypothesis.  相似文献   

The biomechanical characteristics of high-performance endurance running     

Stephen J. Preece  Christopher Bramah  Duncan Mason 《European Journal of Sport Science》2019,19(6):784-792

The biomechanical profile of high-level endurance runners may represent a useful model that could be used for developing training programmes designed to improve running style. This study, therefore, sought to compare the biomechanical characteristics of high-performance and recreational runners. Kinematic and kinetic measurements were taken during overground running from a cohort of 14 high-performance (8 male) and 14 recreational (8 male) runners, at four speeds ranging from 3.3 to 5.6?m?s^?1. Two-way ANOVA analysis was then used to explore group and speed effects and principal component analysis used to explore the interdependence of the tested variables. The data showed the high-performance runners to have a gait style characterised by an increased vertical velocity of the centre of mass and a flight time that was 11% longer than the recreational group. The high-performance group were also observed to adopt a forefoot strike pattern, to contact the ground with their foot closer to their body and to have a larger ankle moment. Importantly, although observed group differences were mostly independent of speed, the tested variables showed a high degree of interdependence suggesting an underlying unitary phenomenon. This is the first study to compare high-performance and recreational runners across a full range of kinematic and kinetic variables. The results suggest that high-performance runners maintain stride length with a prolonged aerial phase, rather than by landing with a more extended knee. These findings motivate future intervention studies that should investigate whether recreational runners could benefit from instruction to decrease shank inclination at foot contact.  相似文献   

French DNCG management control versus UEFA Financial Fair Play: a divergent conception of financial regulation objectives     

Nadine Dermit-Richard  Stephen Morrow 《Soccer & Society》2019,20(3):408-430

The French Football Federation was the first football governing body to put in place, in 1990, a financial regulation system. It might be expected that UEFA’s Financial Fair Play (FFP) system established in 2010 would be similar to French DNCG (National Direction for Management Control) regulations. However, while FFP is concerned with profitability, DNCG is focused on solvency. Hence, a French club may be loss-making and not compliant with FFP, while at the same time being solvent in accordance with DNCG rules. Our research confirms that most French clubs do not conform to FFP rules. As such, it provides further evidence that DNCG has not prevented poor financial management within French clubs. The coexistence of DNCG and FFP– or any other domestic financial regulation and FFP –may result in disparities between domestic clubs. As a consequence, there should be consistent financial regulation in all European leagues.  相似文献   

Considerations for the use of functional principal components analysis in sports biomechanics: examples from on-water rowing     

John Warmenhoven  Stephen Cobley  Conny Draper  Andrew Harrison  Norma Bargary  Richard Smith 《Sports biomechanics / International Society of Biomechanics in Sports》2019,18(3):317-341

The proliferation of new biomechanical technology in laboratory and field settings facilitates the capture of data-sets consisting of complex time-series. An understanding of the appropriate statistical approaches for analysing and interpreting these data-sets is required and the functional data analysis (FDA) family of statistical techniques has emerged in the biomechanical literature. Given the use of FDA is currently in its infancy with biomechanical data, this paper will form the first of a two part series aiming to address practical issues surrounding the application of FDA techniques in biomechanics. This work focuses on functional principal components analysis (fPCA), which is explored using existing literature and sample data from an on-water rowing database. In particular methodological considerations for the implementation of fPCA such as temporal normalisation of data, removal of unwanted forms of variation in a data-set and documented methods for preserving the original temporal properties within a set of curves are explored in detail as a part of this review. Limitations and strengths of the technique are outlined and recommendations are provided to encourage the appropriate use of fPCA within the field of applied sports biomechanics.  相似文献   

The Development and Evaluation of the Intersectional Privilege Screening Inventory for Use With Counselors-in-Training     

Danielle A. Pester  A. Stephen Lenz  Joshua C. Watson 《Counselor Education & Supervision》2020,59(2):112-128

As counselor preparation programs are compelled to demonstrate student social and cultural competence, valid inventories are needed to measure development consistent with contemporary standards. The Intersectional Privilege Screening Inventory was created for this purpose, was assessed using 4 types of validity evidence, and has results supporting its use in student development.  相似文献   

Effects of an aerobic fitness test on short- and long-term memory in elementary-aged children     

Jennifer L. Etnier  Paul M. Sprick  Jeffrey D. Labban  Chia-Hao Shih  Stephen M. Glass  Jarod C. Vance 《Journal of sports sciences》2020,38(19):2264-2272

ABSTRACT

Meta-analytic evidence supports that exercise has benefits for short-term memory (STM) and long-term memory (LTM). However, only three studies with children have tested the differential effects of exercise on STM and LTM. The purpose of this study was to examine the effects of an aerobic fitness test on STM and LTM and to consider the moderating effects of grade level. Children (7–13 years of age) were randomly assigned to either perform an aerobic fitness test before (exercise prior) or after (exercise post) performing the Rey Auditory Verbal Learning Test (RAVLT) to assess memory. Memory was tested again after approximately 24 hours. There were significant differences in memory performance as a function of grade with 4^th and 6^th graders consistently outperforming 2^nd graders. For learning, Day 1 Retention, 24-hr recall, and Day 2 Retention, the exercise prior group performed better than the exercise post group. It is concluded that an aerobic fitness test performed prior to a declarative memory test benefits LTM as compared to when the aerobic fitness test is performed after the memory test.  相似文献   

Guglielmino's self-directed learning readiness scale: A validation study     

Huey B. Long  Stephen K. Agyekum 《Higher Education》1983,12(1):77-87

The attributes of self-direction in learning are becoming increasingly important as the need for lifelong learning grows in strength. Educators are challenged to assist in the development of self-directed learning skills and to encourage learners to more freely use self-direction in their learning activities. Unfortunately, there are few validated procedures for identifying the self-directed learners. Guglielmino's Self-Directed Learning Readiness Scale is one of the few instruments identified in the literature for the purpose of measuring self-direction in learning. Even though the scale has been widely used, additional validation is needed. This study was designed to use a multitrait-multimethod procedure for determining the validity of the SDLRS. The sample included 136 college students from two different colleges: 63 black students, 70 white students and 3 students of other nationalities (other than USA). Thirty-seven specific hypotheses were tested. Findings concerning selected hypotheses are discussed. Three general conclusions concerning the validity of the SDLRS are as follows: (1) The findings are supportive of the validity of the SDLRS; (2) Significant differences were noted in faculty ratings according to racial composition and student scores on the SDLRS; (3) Significant associations exist between the SDLRS scores and variables such as age, educational level and ARS (agreement response set).  相似文献   

Evaluating Academic Challenge Beyond the NSSE     

Stephen L. Payne  Karynne L. M. Kleine  Jim Purcell  Ginger Rudeseal Carter 《Innovative Higher Education》2005,30(2):129-146

The authors investigated student and faculty perceptions of academic challenge at their institution, based on early administrations of the National Survey of Student Engagement (NSSE). This analysis revealed that the NSSE did not fully capture many meanings of academic challenge held by these faculty and students. This study led to a proposal for the development of an internal assessment approach using a modification of the NSSE and other scale items on academic challenge and student engagement. The authors discuss several implications of this study for academic scholarship and for institutional policy concerning the assessment of academic challenge.All authors except Jim Purcell are at Georgia College and State University. Stephen L. Payne received his Ph.D. in Management from Arizona State University. He is an Associate Professor of Management and has broad research interests in areas related to ethics and education. Karynne L. M. Kleine is an Associate Professor of Middle Grades Education and has an Ed.D. from the University of Maine in science studies. Her interests are intellectual development for teacher preparation and the history and philosophy of science education. Jim Purcell received his Ed.D. from the University of Alabama, is currently the Executive Director of State System Research for the Oklahoma State Regents for Higher Education, and concentrates on issues of student retention and graduation. Ginger Rudesal Carter is an Associate Professor of Mass Communication with a Ph.D. from the University of Southern Mississippi. Her interests include research on oral history, the media, and issues relating to the student press.  相似文献