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Effect of different recovery patterns on repeated-sprint ability and neuromuscular responses 总被引：1，自引：0，他引：1
We examined the effect of recovery pattern on mechanical and neuromuscular responses in active men during three repeated-sprint ability tests consisting of ten 6-s cycling sprints. Within each test, the recovery duration was manipulated: constant, increasing, and decreasing recovery pattern. Maximal voluntary contractions of the knee extensors were performed before and after the repeated-sprint ability tests to assess strength and electromyographic activity [root mean square (RMS)] of the quadriceps muscle. We observed different fatigue patterns for peak and mean power output between recovery patterns, with earlier decrements recorded during the increasing recovery pattern. Total work performed over the ten sprints was also lower in the increasing recovery pattern (43.8 +/- 5.4 kJ; P < 0.05). However, the decreasing recovery pattern induced a greater overall power output decrement across the sprints (-15.8%; P < 0.05), compared with the increasing recovery pattern (-5.1%) but not the constant recovery pattern (-10.1%). The decreasing recovery pattern was also associated with higher post-sprint RMS values (+16.2%; P < 0.05). Therefore, the recovery pattern within successive short sprints may influence repeated-sprint ability, and may lead to greater post-sprint neuromuscular adjustments when recovery intervals decrease between sprints. We conclude that peripheral impairments caused the major differences in repeated-sprint ability between recovery patterns. 相似文献
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We examined the hypothesis that congruence between motivational dominance and state results in optimal psychological responses and performance during exercise. Twenty participants (10 telic dominant and 10 paratelic dominant) rated their stress at 5 min intervals as they cycled on an ergometer at gas exchange threshold for 30 min in both telic and paratelic state manipulated conditions. Participants then performed a test to exhaustion at a resistance equivalent to 110% of VO(2max). The hypothesized interaction between condition and dominance was significant for internal tension stress, as paratelic dominants were more stressed than telic dominants when exercising in the telic state and telic dominants were more stressed than paratelic dominants when exercising in the paratelic state. Similarly, the condition × dominance interaction for internal stress discrepancy was significant, as paratelic dominants reported greater internal stress discrepancy exercising in the telic compared with the paratelic state. Findings are discussed in relation to the application of reversal theory for understanding stress responses during aerobic exercise. 相似文献
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ABSTRACTThis article, based on a deep ethnography in schools located in a disadvantaged multicultural context in Geneva (Switzerland), questions the way in which the local school system and teachers comprehend the cultural diversity of students and their parents. Oscillating between recognition and assimilation, teachers publicly adhere to discourses that emphasise cultural diversity, while limiting its expression, especially when a student encounters school difficulties. Teachers’ meetings with parents are significantly influenced by the majority perspective, leaving the parents with little place to express their own needs. Nonetheless, within the conversation, some parents are able to assert practices that differ from those promoted by the host society. Ultimately, it seems that, in the absence of a multicultural position, teachers are limited to adopting hybrid practices that create unease and are evidence of limited understanding of multiculturality. 相似文献
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We are what we do: Examining learner‐generated content in the anatomy laboratory through the lens of activity theory 
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下载免费PDF全文 Video and photography are often used for delivering content within the anatomical sciences. However, instructors typically produce these resources to provide instructional or procedural information. Although the benefits of learner‐generated content have been explored within educational research, virtually no studies have investigated the use of learner‐generated video and photograph content within anatomy dissection laboratories. This study outlines an activity involving learner‐generated video diaries and learner‐generated photograph assignments produced during anatomy laboratory sessions. The learner‐generated photographs and videos provided instructors with a means of formative assessment and allowed instructors to identify evidence of collaborative behavior in the laboratory. Student questionnaires (n = 21) and interviews (n = 5), as well as in‐class observations, were conducted to examine student perspectives on the laboratory activities. The quantitative and qualitative data were examined using the framework of activity theory to identify contradictions between student expectations of, and engagement with, the activity and the actual experiences of the students. Results indicate that learner‐generated photograph and video content can act as a rich source of data on student learning processes and can be used for formative assessment, for observing collaborative behavior, and as a starting point for class discussions. This study stresses the idea that technology choice for activities must align with instructional goals. This research also highlights the utility of activity theory as a framework for assessing classroom and laboratory activities, demonstrating that this approach can guide the development of laboratory activities. Anat Sci Educ 7: 361–369. © 2014 American Association of Anatomists. 相似文献
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Abstract We examined the effect of recovery pattern on mechanical and neuromuscular responses in active men during three repeated-sprint ability tests consisting of ten 6-s cycling sprints. Within each test, the recovery duration was manipulated: constant, increasing, and decreasing recovery pattern. Maximal voluntary contractions of the knee extensors were performed before and after the repeated-sprint ability tests to assess strength and electromyographic activity [root mean square (RMS)] of the quadriceps muscle. We observed different fatigue patterns for peak and mean power output between recovery patterns, with earlier decrements recorded during the increasing recovery pattern. Total work performed over the ten sprints was also lower in the increasing recovery pattern (43.8 ± 5.4 kJ; P < 0.05). However, the decreasing recovery pattern induced a greater overall power output decrement across the sprints (?15.8%; P < 0.05), compared with the increasing recovery pattern (?5.1%) but not the constant recovery pattern (?10.1%). The decreasing recovery pattern was also associated with higher post-sprint RMS values (+16.2%; P < 0.05). Therefore, the recovery pattern within successive short sprints may influence repeated-sprint ability, and may lead to greater post-sprint neuromuscular adjustments when recovery intervals decrease between sprints. We conclude that peripheral impairments caused the major differences in repeated-sprint ability between recovery patterns. 相似文献
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Alan J. Watson Robert D. Phillips Claire Y. Wille 《Asia-Pacific Journal of Teacher Education》1995,23(2):133-164
Teacher knowledge of how to teach a composite class (a class of two or more grades) was studied by observing eight outstanding teachers at work and by eliciting their knowledge of the reasons for their own behaviour. From observation and interviews, 125 incidents, each with an explanatory teacher comment, were collected. A maxim was educed for each and the maxims were classified under six main headings: (1) management, (2) personalisation, (3) class climate, (4) teaching strategies, (5) curriculum, and (6) teaching contexts. The validity of these maxims was assessed by a group of 21 outstanding composite‐class teachers, including seven of the original eight, who also commented on the maxims’ usefulness for in‐service professional development. The majority of outstanding teachers agreed with almost all the maxims and they felt the maxims would be valuable for preservice and in‐service teacher education. This paper discusses the importance of teachers having knowledge and skills in the areas of personalisation of instruction, classroom management and creating a positive class climate. Also discussed are the implications of disagreements amongst teachers over the validity of some of the maxims and the issue of the extent to which composite‐class teaching requires different skills and knowledge from ordinary class teaching. 相似文献