The effects of an increasing versus constant crank rate on peak physiological responses during incremental arm crank ergometry     

Mike J. Price  Lindsay Bottoms  Paul M. Smith  Andrew Nicholettos 《Journal of sports sciences》2013,31(3):263-269

Abstract

We examined the effects of concomitant increases in crank rate and power output on incremental arm crank ergometry. Ten healthy males undertook three incremental upper body exercise tests to volitional exhaustion. The first test determined peak minute power. The subsequent tests involved arm cranking at an initial workload of 40% peak minute power with further increases of 10% peak minute power every 2 min. One involved a constant crank rate of 70 rev · min^?1, the other an initial crank rate of 50 rev · min^?1 increasing by 10 rev · min^?1 every 2 min. Fingertip capillary blood samples were analysed for blood lactate at rest and exhaustion. Local (working muscles) and cardiorespiratory ratings of perceived exertion (RPE) were recorded at the end of each exercise stage. Heart rate and expired gas were monitored continuously. No differences were observed in peak physiological responses or peak minute power achieved during either protocol. Blood lactate concentration tended to be greater for the constant crank rate protocol (P = 0.06). Test duration was shorter for the increasing than for the constant crank rate protocol. The relationship between local RPE and heart rate differed between tests. The results of this study show that increasing cadence during incremental arm crank ergometry provides a valid assessment of peak responses over a shorter duration but alters the heart rate–local RPE relationship.  相似文献   

Cognitive control exertion leads to reductions in peak power output and as well as increased perceived exertion on a graded exercise test to exhaustion     

Jennifer C. Zering  Denver M. Y. Brown  Jeffrey D. Graham 《Journal of sports sciences》2017,35(18):1799-1807

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理性看，齐心办——我国生态文明建设需要注意的两个问题     

程平 《科教文汇》2014,(3):222-223,225

我国生态文明建设需要理性的认识和齐心的行动。理性的认识是不仅指从客观的经济发展方式来理解造成我国严峻生态形势的根本原因,从而诉诸于转型发展的解决路径;而且指从全面的视角看待我国生态形势。从而使我们在充满信心的同时保持高度的生态忧患意识。齐心的行动,是指我们在应对各种生态问题时,不能各私其利、各自为政,而必须以公共利益为重,同心协力采取行动。惟其如此,才能实现美丽中国的目标。  相似文献   

民办大学英语学习者成败归因调查与分析     

刘娜娜  高莲中 《齐齐哈尔师范高等专科学校学报》2014,(1):146-148

本研究以燕京理工学院2011级学生英语学习成败归因问卷调查的数据及其在2011年英语入学考试中的成绩为基础,探索民办大学英语学习者成败归因的特点与趋势。研究发现高分组和低分组的被试的归因趋势不存在显著性差异,主要归因于兴趣(内部、稳定、可控)、努力和方法(内部、不稳定、可控)这三种因素。  相似文献   

大学生党员的党性修养:特征、现状与路径     

徐冠岳 《高校辅导员学刊》2021,13(2):67-71

加强大学生党员的党性修养是高校贯彻落实全面从严治党战略部署的内在要求,是高校辅导员开展党建工作的重要内容,主要面临着认知调谐、价值同构和目标统协的难点,应有针对性地从提升理想信念引领力、加强思想理论学习指向力、强化党规党章教育渗透力、增强组织生活耦合力和续启党性修养驱动力等五个路径向度推进。  相似文献   

Low-Effort Information Searching: The Heuristic Information-Seeking Toolkit     

David Schwieder 《Behavioral & Social Sciences Librarian》2013,32(4):171-187

ABSTRACT

How do academic library users search for scholarly information? While there are many possible ways, research from several scholarly fields offers a useful perspective; studies from social psychology, economics, and library and information science suggest that users will often favor “low-effort” information-seeking approaches. Though many academic librarians undoubtedly advocate efficient information-seeking strategies, we argue that development of a more systematic and coordinated low-effort approach would be beneficial. Accordingly, this article offers an organized “toolkit” of low-effort information-seeking strategies suitable for self-use by library patrons or inclusion in library instruction programs.  相似文献   

目标设置对篮球投篮成绩和努力程度的影响   总被引：2，自引：0，他引：2  

赵雪敏  熊晓蔚 《四川体育科学》2005,(4):75-77

通过困难目标和容易目标对篮球投篮成绩和努力程度的影响的实验研究。结果显示：不现实目标组、困难目标组、容易目标组和“尽力做好”组的投篮成绩随练习次数的增加而显著提高；不现实目标组、困难目标组和容易目标组在感知目标难度上有显著性差异；各目标组之间在努力程度上无显著性差异．  相似文献   

对我校运动员参加大型运动会成败归因的研究     

刘强 《大同职业技术学院学报》2005,(1)

本文采用结构的问卷方法,对同一性别和不同性别的成功或失败者进行分析研究,认为成功者更多地把其行为结果归于稳定的内部原因,失败者则更多地把其行为结果归于不稳定而又可控制的内部原因.  相似文献   

大学生英语学习归因方式与四级成绩的相关性研究     

王硕  高莲中  刘娜娜 《黑龙江教育学院学报》2015,(3):119-123

以维纳的归因理论为理论基础,运用定量研究的方法,对燕京理工学院328名非英语专业学生的归因方式进行了研究,并分析了学生的归因方式与大学英语四级成绩的关系。研究结果表明,在英语学习成败归因中,能力归因最能预测自我定位为成功的英语学习者的成绩变化,而情境最能决定自我定位为失败的英语学习者的成绩变化,二者都与四级成绩呈正相关。  相似文献   

Do teachers’ perceptions of children’s math and reading related ability and effort predict children’s self-concept of ability in math and reading?     

Katja Upadyaya  Jacquelynne Eccles 《教育心理学》2015,35(1):110-127

This study investigated to what extent primary school teachers’ perceptions of their students’ ability and effort predict developmental changes in children’s self-concepts of ability in math and reading after controlling for students’ academic performance and general intelligence. Three cohorts (N?=?849) of elementary school children and their teachers were followed for four years. Children’s self-concepts and performance ability in math and reading were measured annually during Waves 2–4. Teachers rated the children’s ability and effort at each of the four waves. Domain-specific differences and developmental changes could be identified in the associations between teachers’ perceptions and children’s ability self-concepts. Teachers’ ability perceptions predicted children’s concurrent and subsequent ability self-concepts in math and reading, whereas teachers’ effort perceptions predicted children’s math ability self-concept only at Wave 4. Analyses with multi-sample procedure showed that these models were similar for boys and girls and for children in different cohort groups.  相似文献