Can changes in resistance exercise workload influence internal load,countermovement jump performance and the endocrine response?

This study examined the influence of differing volume load and intensity (%1 repetition maximum[%1RM]) resistance exercise workouts on session rating of perceived exertion (sRPE) countermovement jump (CMJ) performance and endocrine responses. Twelve participants performed a workout comprising four exercises (bench press, back squat, deadlift and prone bench pull) in randomised order as either power (POW); 3 sets × 6 repetitions at 45%1RM × 3 min inter-set rest, strength (ST); 3 sets × 3 repetitions at 90%1RM × 3 min inter-set rest, or hypertrophy (HYP); 3 sets × 10 repetitions at 70%1RM × 1 min inter-set rest in a randomised-crossover design. CMJ performance and endocrine responses were measured immediately pre-, post-, 12, 24, 48 and 72 h post-exercise. POW sRPE (3.0 ± 1.0) was lower than ST (4.5 ± 1.0) (P = 0.01), and both were lower than HYP (8.5 ± 1.0) (P = 0.01). Duration of CMJ decrement was longer (P ≤ 0.05) for HYP (72 h) compared to POW (12 h) and ST (24 h). Testosterone concentration was greater (P ≤ 0.05) immediately post-exercise in HYP compared to POW and ST. In conclusion, less inter-set rest, greater volume load and intensity (%1RM) may increase sRPE, duration of CMJ performance decrement and testosterone responses in resistance exercise.     

The one-week and six-month reliability and variability of three-dimensional tibial acceleration in runners*

Tibial acceleration is a surrogate measure for impact loading and lower limb fatigue injury in runners. Triaxial accelerometers may offer reliable and practical measurement of resultant peak tibial acceleration (PTA). With such potential in mind, this study examined variability and measurement reliability of tibial acceleration in 14 runners at baseline at one week, and eight of the runners again at six months. Triaxial accelerometers were attached to the distal tibiae of runners before they ran on a treadmill for two minutes each, at speeds of 2.7, 3.0, 3.3 and 3.7 m/s in standardised shoes. Resultant PTAs were calculated for each speed and session. Reliability outcomes were presented as percentage change and effect sizes. Variability outcomes included intraclass correlation coefficients and the typical error of the measurement. Smallest worthwhile change and performance/noise ratio were also calculated. While runners demonstrated marginally lower reliability and higher variability over six months, compared to one week, in all cases the measures of reliability and variability were of ‘good’ to ‘moderate’ reliability, and ‘small’ to ‘moderate’ variability using magnitude-based inferences. We can be confident that resultant PTA can be used with runners to assess and monitor their impacts throughout a six-month intervention.     

Validity of Self-Reported Pedometer Steps per Day in College Students

The purpose of this article was to examine the validity of self-reported pedometer steps/day. Forty-seven participants were provided a New Lifestyles NL-2000 (NL-2000; Lees Summit, MO, USA) pedometer and a physical activity (PA) diary for 3 weeks, but not informed of the data-storing capabilities. For weeks 2 and 3, each participant was given a step goal of 3,000 steps/day above week 1 average. A 2 × 3 repeated measures analysis of variance (ANOVA) was used to examine differences between reported steps/day. Bland–Altman plots assessed the mean bias and limits of agreement between reporting methods. Mean self-reported and NL-2000 steps/day were 9,264 ± 3,555 and 8,971 ± 3,590 steps/day (n = 26, p > .05). Mean biases were 216 ± 1,753 (week 1), –506 ± 1,355 (week 2), and –590 ± 1,360 (week 3) steps/day. Negative mean bias values indicate higher self-reported steps/day. Mean steps/day were similar between recording methods, but large differences were observed among individuals, suggesting self-reported steps/day may be valid for PA research at the population level, but not the individual level.     

基于读者需求的馆藏智能监控

从分析读者对知识的需求出发,正确应对读者需求的变化,改进传统服务模式,探索新的服务模式,运用新技术对馆藏进行智能监控,优化馆藏,使馆藏资源配置合理,读者需求得以实现.参考文献6.     

The Art of Reading: The National Dutch Reading Promotion Program

The Art of Reading is a national reading promotion program in the Netherlands targeting children and youngsters from birth to 18 years of age. Launched in 2008, the program reached in 2016 nearly 700,000 children. In this article, we describe the program’s background, ambitions, content, and implementation, as well as the central role of the public library in its development and execution. A special focus is on the digital monitoring system that has been created to monitor the impact of the program on pupils’ reading behavior and teachers’ reading promotion behavior.     

青少年体质监测管理评价指标体系构建研究*

在分析青少年体质监测管理评价研究现状、评价基点与目标基础上,采用文献资料法、专家访谈法、德尔菲法等,构建青少年体质监测管理评价指标体系,并确定各指标权重。该指标体系由制度建设（权重0.2925）、宣传教育（权重0.1508）、管理投入（权重0.2032）、组织管理（权重0.2283）、服务措施（权重0.1252）5个一级指标、19个二级指标构成,并提出该指标体系的应用从“主体培育、运作方法、结果运用”三方面整体把握。     

本院男足代表队有球大负荷训练的实验研究

为了掌握和调控运动负荷,保证大赛中保持良好的竞技状态,我们根据本院国子足球代表队运动员的特点了一套有球大负荷训练的计算,选择五项指标来监测训练的效果,结果表明本院男子足球代表队的有球大负荷训练收到了预期效果,整体质量已经达到我国优秀青年足球队训练的水平。     

我国开展室内环境监测的重要性和必要性

在人们日益重视环境污染的今天 ,加强人们对室内环境监测的重要性和必要性的认识 ,认真分析室内污染物的来源、危害和我国室内环境监测现状、质量标准、检验方法及其存在的问题 ,对保护人类的身体健康 ,提高人们的室内环境意识具有重要的意义。     

关于建立我国高校体育市场监督管理体制的基本原则及模式的构想

采用文献资料、走访座谈、实地考察和逻辑分析等方法,从市场监督管理学的角度对建立我国高校体育市场监督管理体制的基本原则和模式的构想进行了初步研究.结果表明:建立我国的高校体育市场监督管理体制在处理好政府与市场关系的基础上,必须遵循三个原则,即统一原则、权威原则和高效原则,并兼顾四个因素,即市场特点、国家经济安全需要、改革的进展和市场监管职能作用的界定.在综合考虑我国高校体育市场监督机构设置、隶属关系、权限划分等所要遵循的原则,以及我国高校体育市场现实相关因素基础上.应尽快建立我国高校体育市场监督管理体制,使我国高校体育市场监管体制能有效地促进体育产业的健康发展.     

基于大数据的热点区域人员流量实时监测系统

采用大数据技术实现一个热点区域人员流量的实时监测系统.该系统分析热点区域内每个出入口实时人员流量,挖掘各热点区域驻留人员数量规律,从而科学地安排资源及运营管理.整个处理过程耗时少于15 s,误差小于7.5%.运营结果表明该系统达到了大数据的实时采集、实时分析处理和实时分区控制的可实用目标.