Reproducibility of the maximum accumulated oxygen deficit and run time to exhaustion during short-distance running     

Mike Doherty  Paul M. Smith  Karl Schroder 《Journal of sports sciences》2013,31(5):331-338

The aim of this study was to determine the reproducibility of the maximal accumulated oxygen deficit and the associated exercise time to exhaustion during short-distance running. Fifteen well-trained males (mean - s : VO 2max = 58.0 - 4.6 ml.kg -1 .min -1 ) performed the maximum accumulated oxygen deficit test at an exercise intensity equivalent to 125% VO 2max . The test was repeated at the same time of day on three occasions within 3 weeks. There was no significant systematic bias between trials for either maximum accumulated oxygen deficit (mean - s : trial 1 = 69.0 - 13.1; trial 2 = 71.4 - 12.5; trial 3 = 70.4 - 15.0 ml O 2 Eq.kg -1 ; ANOVA, F = 0.70, P = 0.51) or exercise time to exhaustion (trial 1 = 194 - 31.1; trial 2 = 198 - 33.2; trial 3 = 201 - 36.8 s; F = 1.49, P = 0.24). In addition, other traditional measures of reliability were also favourable. These included intraclass correlation coefficients of 0.91 and 0.87, and sample coefficients of variation of 6.8% and 5.0%, for maximum accumulated oxygen deficit and exercise time to exhaustion respectively. However, the '95% limits of agreement' were 0 - 15.1 ml O 2 Eq (1.01 2 / 1 1.26 as a ratio) and 0 - 33.5 s (1.0 2 / 1 1.18 as a ratio) for maximum accumulated oxygen deficit and exercise time to exhaustion respectively. We estimate that the sample sizes required to detect a 10% change in exercise time to exhaustion and maximum accumulated oxygen deficit after a repeated measures experiment are 10 and 20 respectively. Unlike the results of previous maximum accumulated oxygen deficit studies, we conclude that it is not a reliable measure.  相似文献   

The effects of work – rest duration on intermittent exercise and subsequent performance     

Mike Price  Karl Halabi 《Journal of sports sciences》2013,31(8):835-842

This study examined the effects of different work?–?rest durations during 40?min intermittent treadmill exercise and subsequent running performance. Eight males (mean?±?s: age 24.3?±?2.0 years, body mass 79.4?±?7.0?kg, height 1.77?±?0.05?m) undertook intermittent exercise involving repeated sprints at 120% of the speed at which maximal oxygen uptake (v-[Vdot]O_2max) was attained with passive recovery between each one. The work?–?rest ratio was constant at 1:1.5 with trials involving short (6:9?s), medium (12:18?s) or long (24:36?s) work?–?rest durations. Each trial was followed by a performance run to volitional exhaustion at 150% v-[Vdot]O_2max. After 40?min, mean exercise intensity was greater during the long (68.4?±?9.3%) than the short work?–?rest trial (54.9?±?8.1% [Vdot]O_2max; P?<?0.05). Blood lactate concentration at 10?min was higher in the long and medium than in the short work?–?rest trial (6.1?±?0.8, 5.2?±?0.9, 4.5?±?1.3?mmol?·?l^?1, respectively; P?<?0.05). The respiratory exchange ratio was consistently higher during the long than during the medium and short work?–?rest trials (P <?0.05). Plasma glucose concentration was higher in the long and medium than in the short work?–?rest trial after 40?min of exercise (5.6?±?0.1, 6.6?±?0.2 and 5.3?±?0.5?mmol?·?l^?1, respectively; P?<?0.05). No differences were observed between trials for performance time (72.7?±?14.9, 63.2?±?13.2, 57.6?±?13.5?s for the short, medium and long work?–?rest trial, respectively; P = 0.17), although a relationship between performance time and 40?min plasma glucose was observed (P?<?0.05). The results show that 40?min of intermittent exercise involving long and medium work?–?rest durations elicits greater physiological strain and carbohydrate utilization than the same amount of intermittent exercise undertaken with a short work?–?rest duration.  相似文献   

Too little or too much? Parafoveal preview benefits and parafoveal load costs in dyslexic adults     

Susana Silva  Luís Faísca  Susana Araújo  Luis Casaca  Loide Carvalho  Karl Magnus Petersson  Alexandra Reis 《Annals of dyslexia》2016,66(2):187-201

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The control of teacher education in the United States     

Karl W. Bigelow 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1955,1(3):289-303

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Predicting course performance in freshman and sophomore physics courses: Women are more predictable than men     

Susan McCammon  Jeannie Golden  Karl L. Wuensch 《科学教学研究杂志》1988,25(6):501-510

This study investigated the extent to which thinking skills and mathematical competency would predict the course performance of freshman and sophomore science majors enrolled in physics courses. Multiple-regression equations revealed that algebra and critical thinking skills were the best overall predictors across several physics courses. Although arithmetic skills, math anxiety, and primary mental abilities scores also correlated with performance, they were redundant with the algebra and critical thinking. The most surprising finding of the study was the differential validity by sex; predictor variables were successful in predicting course performance for women but not for men.  相似文献   

The twofold character of comparative education: Cross-cultural comparison and externalization to world situations     

Jürgen Karl Schriewer 《Prospects》1989,19(3):389-406

Member of the Executive Committee of the Comparative Education Society in Europe. His research work focuses on the comparative social history of education. His publications include two books on France, Die französischen Universitäten 1945–1968 (1972) Schulreform und Bildungspolitik in Frankreich (1974), Geschichte der Pädagogik und systematische Erziehungswissenschaft(co-editor) (1976), and Theories and Methods in Comparative Education(1988). He has published numerous articles in scholarly reviews, especially in Zeitschrift für Pädagogik.  相似文献   

Determinants of the Development of Education in Post‐War Berlin     

Karl‐Heinz Fuessel  Christian Kubina 《Compare》1984,14(1):21-39

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TEACHING INDUCTIVE THINKING TO HIGHLY ABLE CHILDREN     

Karl Josef Klauer 《High Ability Studies》1992,3(2):164-180

Two criteria were used to identify highly able kindergarten children: assessment by teachers and an IQ ≥ 115 on Raven's Progressive Matrices. In this way, 16 highly able children were found, matched pairwise according to age and IQ, and then randomly allotted to two treatment conditions. In one condition the children were trained using a program for fostering inductive thinking, whereas the children in the other condition continued their normal kindergarten activities. Based upon a new theory of inductive reasoning, the training was expected to have a positive effect on intelligence test performance. Results showed that all of the trained children outperformed their matched counterparts. It was concluded that, even with highly able children, the level of cognitive functioning can be improved, and that training of inductive thinking is an effective means to this end.  相似文献   

A deeper look at how teachers say what they say: A quantitative modality analysis of teacher-to-teacher talk     

Karl W. Kosko  Patricio Herbst 《Teaching and Teacher Education》2012

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Generative Processes: Thick Drawing     

Karl Wallick 《The International Journal of Art & Design Education》2012,31(1):19-29

This article presents techniques and theories of generative drawing as a means for developing complex content in architecture design studios. Appending the word ‘generative’ to drawing adds specificity to the most common representation tool and clarifies that such drawings are not singularly about communication or documentation but are also productive instruments for architectural inquiry. A particular aspect of generative drawings is their potential to directly activate conceptualisation processes. Such advancement is demonstrated through evidence of continued design thinking development rather than isolation of schemes at a particular point in a process. Generative drawings offer the means of advancing multiple paths of inquiry rather than singular research channels typified in introductory pedagogies. The relevance of drawings as polemical instruments or tools of critique and history is well established, but the intellectual and physical techniques of generative drawing that advance multiple modes of architectural research are less explicit. The use of drawings as discursive instruments is a critical step towards the alignment of authorship as but one category of priority alongside the rich and complex field of forces beyond individual intuition. The recognition of design research as a category of inquiry commensurate with scientific or historical disciplines requires that our instruments have explicitly defined purpose. By discussing specific techniques and the reasons for communicating such intuitive or inexplicit architectural conditions, this article seeks to disperse the mysterious haze that obscures the legibility of architectural drawing from the uninitiated.  相似文献