春节健身进行时

2008年新年钟声已经敲响,奥运会的召开日益临近,一年一度的传统节日——春节也渐行渐近。伴随着节假日的健身潮,奥运年的特殊春节,我们应该怎样健身呢?     

运动为什么会上瘾?

正积极运动理念不断被普及的今天,人们越来越注重运动健身。毫无疑问,规律、适量的运动能够改善心血管功能和免疫力,增强肌肉质量和力量,维持健康的生理状态。但是,对于一部分人来说,运动已经不再是帮助他们获得健康的重要方式,反而成为危害身体健康的重要因素。因为,过度的运动锻炼会导致"运动成瘾",甚至对人体的生理、心理造成负面影响。何谓运动成瘾?如果你认为运动锻炼的重要性凌驾于家庭、工作和人际关系之上,甚至在不能运动时出现沮丧消沉、睡眠质量下降和焦虑不安的症状,那么你可能就"运动成瘾"。早在1987年英国学者罗札德克佛利就首次提出了"运动依赖"     

河北省城市老年健身公共服务体系研究

城市老年健身公共服务体系的建立和完善,是提高城市老年人健身水平的重要举措。本文运用文献资料法、问卷调查法、逻辑分析法等研究方法,调查分析了目前河北省老年健身活动的现状,并根据现状提出了发展对策和建议,为河北省老年健身公共服务体系的构建提供了良好的理论依据。     

健身健美负荷训练中的心率阈研究

目的：为提供科学负荷训练的心率阈,以作为健身健美负荷训练的运动强度评定量化标准和依据,避免负荷训练中运动量的过阈。方法：主要采用实验法和统计分析法。结果：以强度8最大强度值（aM）练习,坐姿伸腿的心率在75～80b／min阚值之间,颈后深蹲心率在140—150b／min阈值之间;深蹲和卧推比较,8RM深蹲的心率上限值接近150b／min,8RM卧推的心率上限值100～105b／min;相同的练习,8RM或15RM训练的心率高于1RM练习的心率。结论：以一定范围的rtM（最大重复值）锻炼目标肌肉,多关节负荷训练比单关节负荷训练的心率上升幅度大;相同次数的RM深蹲和卧推运动心率阈值比较,深蹲的心率明显高于卧推的心率;相同动作心率阈值比较,多次数的RM心率高于1RM心率。     

家长因素对幼儿参与健身类课程的影响

以上海市28所幼儿园的204名幼儿为研究对象,从家长的视角探寻影响幼儿参与健身类课程的因素,运用文献资料法、问卷调查法和数理统计等方法对影响幼儿参与健身类课程的家长因素进行研究,寻求促进幼儿参与健身类课程的方法与措施,为帮助更多的幼儿运动起来,不再依赖电脑、电视和电子游戏等,从而为促使幼儿更加健康的发展奠定一定的理论基础.结果表明:(1)父母的健身经历及父亲受教育的程度能较显著地影响幼儿喜欢运动的程度.(2)父母对幼儿参与运动的消极观念会严重地影响幼儿参与运动的积极性.(3)母亲参与健身的经历对幼儿参加健身类课程的意向具有较显著性的影响,有健身经历的母亲越会让幼儿参与健身类课程.(4)父母受教育的程度对幼儿参加健身类课程的意向具有较显著的影响,父母的学历越高,幼儿参加健身类课程的意向越明显.     

Growth-Defense Tradeoffs in Plants： A Balancing Act to Optimize Fitness

Growth-defense tradeoffs are thought to occur in plants due to resource restrictions, which demand prior- itization towards either growth or defense, depending on external and internal factors. These tradeoffs have profound implications in agriculture and natural ecosystems, as both processes are vital for plant survival, reproduction, and, ulti- mately, plant fitness. While many of the molecular mechanisms underlying growth and defense tradeoffs remain to be elucidated, hormone crosstalk has emerged as a major player in regulating tradeoffs needed to achieve a balance. In this review, we cover recent advances in understanding growth-defense tradeoffs in plants as well as what is known regard- ing the underlying molecular mechanisms. Specifically, we address evidence supporting the growth-defense tradeoff concept, as well as known interactions between defense signaling and growth signaling. Understanding the molecular basis of these tradeoffs in plants should provide a foundation for the development of breeding strategies that optimize the growth-defense balance to maximize crop yield to meet rising global food and biofuel demands.     

浅谈太极拳对老年人的健身养生功效

本文针对日益明显的人口老龄化问题,提出了太极拳对老年人健身机理的研究,提出太极拳对老年人生理、心理等方面良性的功效,让全世界更多的老人了解并受益于太极拳。     

虫草健身胶囊,贴身的呵护

<正>1虫草健身胶囊的营养组成虫草健身胶囊是以传统的中医中药理论为基础,利用人工发酵虫草(蝙蝠娥拟青霉菌)菌丝体为主要原料,辅加酸枣仁、远志精制而成的特殊营养食品。各组分的作用:①人     

Influence of rice black streaked dwarf virus on the ecological fitness of non-vector planthopper Nilaparvata lugens （Hemiptera： Delphacidae）

Rice black streak dwarf virus （RBSDV） is transmitted by the small brown planthopper （SBPH）, Laodelphax striatellus （Fallen）. Non-vector rice brown planthopper （BPH）, Nilaparvata lugens （Stal）, shares the same host rice plants with SBPH in paddy fields. The changes in nutritional composition of rice plants infected by RBSDV and the ecological fitness of BPH feeding on the infected plants were studied under both artificial climate chamber and field conditions. Contents of 16 detected amino acids and soluble sugar in RBSDV infected rice plants were higher than those in the healthy ones. On the diseased plants BPH had significantly higher nymphal survival rates, nymphal duration of the males, weight of the female adults, as well as egg hatchability compared to BPH being fed on healthy plants. However, there was no obvious difference in female nymph duration, longevity and fecundity. Defense enzymes （superoxidase dismutase, SOD and catalase, CAT） and detoxifying enzymes （carboxylesterase, CAE and glutathione S-transferase, GST） in BPH adults fed on diseased plants had markedly higher activities. The results indicate rice plants infected by RBSDV improved the ecological fitness of the brown planthopper, a serious pest but not a transmitter of the RBSDV virus.     

健身气功·八段锦对痰湿壅盛型高血压患者的干预作用*

目的: 探究健身气功·八段锦对痰湿壅盛型高血压患者的干预作用。方法: 将47例壅盛型高血压患者随机分为八段锦组和对照组,其中八段锦组23例,对照组24例。经16周八段锦锻炼,分别检测患者血压,观察中医体质评分变化;取血检测血液流变学指标,以及血浆MDA、SOD、ET-1、Hcy水平。结果: 与对照组比较,经16周八段锦干预后,八段锦组舒张压与收缩压均有所降低(P＜0.05或P＜0.01),中医体质评分减少;全血粘度明显的降低(P＜0.05或P＜0.01);血浆SOD活性显著升高(P＜0.05),血浆MDA和ET-1水平显著降低(P＜0.05或P＜0.01),Hcy水平无显著差异,但试验后高Hcy人数有所减少。结论: 八段锦作为一种非药物的传统运动干预手段,能改善痰湿壅盛型高血压患者体质,可作为壅盛型高血压患者的日常辅助干预方法。