Esports players,got muscle? Competitive video game players’ physical activity,body fat,bone mineral content,and muscle mass in comparison to matched controls

BackgroundEsports players, like traditional athletes, practice for long hours and, thus, are vulnerable to the negative health effects of prolonged sitting. There is a lack of research on the physical activity and the health ramifications of prolonged sitting by competitive players. The purpose of this study was to investigate activity levels, body mass index (BMI), and body composition in collegiate esports players as compared to age-matched controls.MethodsTwenty-four male collegiate esports players and non-esports players between 18 and 25 years of age signed a written consent to participate. Physical activity was examined using daily activity (step count) with a wrist-worn activity tracker. A questionnaire assessing physical activity was also administered. Secondary outcomes included body-fat percentage, lean-body mass, BMI, and bone mineral content measured using dual X-ray absorptiometry.ResultsThe step count in the esports players was significantly lower than the age-matched controls (6040.2 ± 3028.6 vs. 12843.8 ± 5661.1; p = 0.004). Esports players exhibited greater body-fat percentage (p = 0.05), less lean body mass (p = 0.003), and less bone mineral content (p = 0.03), despite no difference in BMI between the esports and non-esports players.ConclusionAs compared to non-esports players, collegiate esports players were significantly less active and had a higher body-fat percentage, with lower lean body mass and bone mineral content. The BMIs showed no difference between the 2 groups. Esports athletes displayed significantly less activity and poor body composition, which are all correlated with potential health issues and risk of injury. BMI did not capture this difference and should not be considered as an accurate measure of health in competitive esports players.     

Thermophysical properties of the regolith on the lunar far side revealed by the in situ temperature probing of the Chang’E-4 mission

Temperature probes onboard the Chang’E-4 (CE-4) spacecraft provide the first in situ regolith temperature measurements from the far side of the Moon. We present these temperature measurements with a customized thermal model and reveal the particle size of the lunar regolith at the CE-4 landing site to be ∼15 μm on average over depth, which indicates an immature regolith below the surface. In addition, the conductive component of thermal conductivity is measured as ∼1.53 × 10^–3 W m^–1 K^–1 on the surface and ∼8.48 × 10^–3 W m^–1 K^–1 at a depth of 1 m. The average bulk density is ∼471 kg m^–3 on the surface and ∼824 kg m^–3 in the upper 30 cm of the lunar regolith. These thermophysical properties provide important additional ‘ground truth’ at the lunar far side, which is critical for the future analysis and interpretation of global temperature observations.     

独立学院会计模拟实验室初探

在独立学院新型办学机制与模式下,会计模拟实验室在会计教学体系中的作用和地位显得尤为重要。本文从会计教学软硬件二维结构图出发,提出会计模拟实验是新时期会计教学的热点,会计模拟实验室建设是经济管理专业实验室建设的起点,并在此基础上探讨了会计模拟实验教学和会计模拟实验室建设过程中可能出现的误区和归避的方法。     

浅谈ERP对企业发展的影响

ERP是企业信息化中很重要而且很基础的一环,是提升企业竞争力的有利武器。信息时代的号角已经吹响,我们清楚地看到企业的发展显现出鲜明的特点:跨国企业、循环在全球供应链的企业、出口产品加工企业等等,由于全球化竞争,亟待提升自主创新设计、压缩制造成本、提高企业效率,规范经营模式,由此,信息化的支撑至关重要。ERP作为现代信息技术与管理思想融合的产物为其提供了有力支持,同时也是企业发展进程中的催化剂。它对企业经济利润的获取,品牌效应的提升,企业文化的形成以及隐性知识的共享等都发挥着巨大而深远的作用。     

一种基于遗传算法的作曲方法

本文介绍了一种基于遗传算法,以乐段为单位的作曲方法。该方法能生成具有相对完整乐思的音乐片段,并引入了音乐的风格化特征,能按照用户的情感因素产生用户所需的音乐片断。     

非线性编辑系统的应用探讨

非线性编辑是视频制作的发展方向。本文从应用角度介绍了非线性编辑系统并对非线性编辑系统进行了分析。     

现代高等教育与高校图书馆文献信息资源构建

阐述了现代高等教育的特点,分析了高校图书馆文献资源建设存在的问题,提出了高校图书馆文献资源构建的设想。     

高校图书馆流通数据分析与读者阅读倾向——以大庆石油学院图书馆为例

文章对2004～2005年大庆石油学院图书馆各类中文图书流通情况进行统计分析,旨在了解我校读者的主要阅读倾向,以提高图书馆读者服务工作。     

洛江区制造业信息化发展的对策

介绍国内外制造业信息化的发展概况,分析洛江区制造业信息化的现状和存在问题,根据洛江区的产业发展方向和制造业发展的特点,提出具有区域特色制造业信息化发展策略。     

彩色自然风景图片的四季特征提取

根据彩色自然风景图片的特点,提出"天空去除"和"1/2区域分析"改进法提取图像的颜色特征,同时采用四季轮盘调查法收集用户评价,然后通过多元线性回归方法建立颜色特征与用户评价的映射关系,用于彩色自然风景图片四季特征的自动提取.通过实验验证了该映射机制对于正确预测彩色自然风景图片四季特征的有效性.