Application of velocity loss thresholds during free-weight resistance training: Responses and reproducibility of perceptual,metabolic, and neuromuscular outcomes     

Jonathon Weakley  Shaun McLaren  Carlos Ramirez-Lopez  Amador García-Ramos  Nick Dalton-Barron  Harry Banyard 《Journal of sports sciences》2020,38(5):477-485

ABSTRACT

The aim of this study was to investigate the differences and long-term reliability in perceptual, metabolic, and neuromuscular responses to velocity loss resistance training protocols. Using a repeated, counterbalanced, crossover design, twelve team-sport athletes completed 5-sets of barbell back-squats at a load corresponding to a mean concentric velocity of ~0.70 m·s^?1. On different days, repetitions were performed until a 10%, 20% or 30% velocity loss was attained, with outcome measures collected after each set. Sessions were repeated after four-weeks. There were substantial between-protocol differences in post-set differential ratings of perceived exertion (dRPE, i.e., breathlessness and leg muscles, AU) and blood lactate concentration (B[La], mmol·L^?1), such that 30%>20%>10% by small to large magnitudes. Differences in post-set countermovement jump (CMJ) variables were small for most variables, such that 30%<20%<10%. Standard deviations representing four-week variability of post-set responses to each protocol were: dRPE, 8–11; B[La], 0.8–1.0; CMJ height, 1.6–2.0; CMJ PPO, 1.0–1.8; CMJ PCV, 0.04–0.06; CMJ 100ms-Impulse, 5.7–11.9. Velocity loss thresholds control the magnitude of perceptual, metabolic, and neuromuscular responses to resistance training. For practitioners wanting to reliably prescribe training that can induce a given perceptual, metabolic, or neuromuscular response, it is strongly advised that velocity-based thresholds are implemented.  相似文献   

高校篮球运动员专项体能特征分析研究     

金彬彬  陈清 《体育科技文献通报》2020,(4):171-171,175

在篮球运动当中,专项体能培养是帮助运动员熟练掌握篮球技能并进行实战应用的重要条件。文章采用文献资料等,根据分析高校篮球运动员的专项体能的特征,提出了有效培养高校篮球运动员的专项体能训练的手段与办法,旨为进一步推进高校篮球专项体能训练的发展。  相似文献   

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   

试论知识主管的职责与素质     

牛继舜  徐彬 《情报理论与实践》2003,26(1):20-23

1　ＣＫＯ的产生知识主管 (ＣｈｉｅｆＫｎｏｗｌｅｄｇｅＯｆｆｉｃｅｒ ,ＣＫＯ) ,也称智力资产总监 (ＤｉｒｅｃｔｏｒｏｆＩｎｔｅｌｌｅｃｔｕａｌＣａｐｉｔａｌ) ,是一种新型高级管理职务 ,其职责是管理组织的智力资产———知识资本。知识经济时代 ,影响组织的竞争能力、效益增长 ,使产品和服务增值的无形关键因素是组织的智力资产 ,即员工在知识经验、技能诀窍、工作伦理、道德规范等方面的综合智能 ,以及学习新技术、新知识、新解决方案、做好新工作的能力[1] 。知识正取代资金、自然资源和劳动力而成为最基本的经济资源 ,成功的…  相似文献   

论大学生信息获取技能训练学习环境的创设     

吕建辉 《现代情报》2006,26(4):187-189

创设大学生信息获取技能训练的学习环境旨在为当代大学生建造一个科学、有效的从各种信息源中广泛收集、巧妙获取各种有用信息相关技巧与能力的平台，用科学发展观的理念构建的《文献信息检索与利用技能训练课》厦其配套学习指导、辅导等，能引导学生在学习和使用信息检索技术、参与信息活动的过程中，实现知识与技能、过程与方法、情感态度与价值观等不同层面信息素养的综合提升和协调发展。  相似文献   

E-Learning的优势、障碍及策略   总被引：5，自引：0，他引：5  

连任  万希 《软科学》2005,19(2):57-59

在线学习是企业培训发展的新趋势,它具有及时、快捷、方便和节约成本的优点,但是也存在一定的局限性。因此,企业在实施在线学习时要注意七个方面的问题,以避免上在线学习项目的盲目性。  相似文献   

基于线性回归法的网络信息资源评价模型的应用     

张东华 《现代情报》2007,27(8):10-12,15

本论文利用统计中的线性回归模型的方法建立了评价模型。然后,开展调查、获取数据,利用所得的数据估计模型中的参数,求出关于综合指标的线性评价模型。最后,利用所建立的模型对具体的网站进行评价,以检验模型的合理性。  相似文献   

高职教育——“灰领人才”的摇篮     

孙玉梅 《中国科技信息》2005,(17B):152-152

随着经济的发展， 对复合型人才的需求，“灰领”成为越来越被关注的群体，对于“灰领人才”的培养也就成为一个需要重视的问题，正在不断兴起壮大的高职院校成为了“灰领人才”的摇篮，高职教育正冲破重重阻力，不断地向社会输送大批高技能的实用型人才，同时期待着更多的瞩目与关爱。  相似文献   

浅论学生英语阅读能力的培养     

申美玲 《安阳工学院学报》2005,(3):149-151

英语阅读能力的培养是英语教学中一项重要的工作.阅读能力受到多种因素的影响,应采取不同措施培养和提高学生的阅读能力.  相似文献   

Collaborative action research through technologically mediated agoras     

Elia Fernández-Díaz  Lorea Fernández-Olaskoaga  Prudencia Gutiérrez-Esteban 《Educational Action Research》2017,25(1):56-70

The study presented in this article forms part of a wider project promoting collaboration between junior researchers from different universities with the objective of rethinking and improving teaching practice in relation to the use of technology. The article describes research carried out during the 2012/13 academic year aimed at developing collaborative action research through technologically mediated agoras involving students from three Spanish universities. The main results of this study show that junior researchers improved their teaching practice through technologically mediated inside and outside agoras. In addition, the transformation of university classrooms into agoras enabled the negotiated reconstruction of knowledge for the analysis of good practice in the use of technology. Likewise, these agoras helped reduce limitations by breaking down the barriers of time, distance and resources for sharing findings and limitations between junior researchers. Furthermore, they pave the way for improvements and their implementation in learning processes during initial teacher training.  相似文献