中学作文教学原则初探

造成中学作文教学质量和效率低下的根本原因是教学过程和教学方法的非科学化.科学化的作文教学必须从"学习和掌握语言"的本质和规律出发,遵循作文教学的原则,即语文基本能力发展与思维品质培养相结合的原则、先放后收的原则、教师下水的原则.     

澳门学生的体脂率以及与部分运动素质项目的相关研究

通过对澳门青少年的体质调查和统计分析,得出澳门青少年的体脂率均数、年龄变化及性别差异;得出澳门青少年相邻年龄组体脂率均数差别的检验结果、体指率分布的正态性检验结果、体脂率与部分运动素质项目相关分析的结果,为体育教育和健康辅导等提供依据性资料。     

游泳锻炼10个月后青少年体质的变化

对持续进行10个月游泳锻炼的60名大学一年级女学生锻炼前后身体成分和心肺功能进行测试分析。结果显示,长期游泳锻炼可一定程度降低女大学生体脂百分比,减轻体重,减慢安静心率、呼吸频率,降低血压,提高肺活量。提示游泳锻炼有利于保持大学生体型健美,改善其心血管、呼吸系统功能。     

艺术体操成套动作编排应用模式研究

运用文献资料法、问卷调查法、图像分析法、专家访谈法和数理统计法等综合研究方法,在理论分析、编排实践经验总结和专家论证基础上构建出艺术体操成套动作编排应用模式.应用模式由主要因素、内容和标准三部分组成.模式标准,既有定量指标,又具有简明扼要文字说明形式的定性指标.     

Partnership Programs in U.S. Schools: Their Development and Relationship to Family Involvement Outcomes

This study examined data from over 300 U.S. schools on their efforts to develop high quality programs of school, family, and community partnerships. Analyses show that elementary schools, schools with greater support from parents, teachers, and the community; and schools that evaluated progress reported higher quality partnership programs over time. Higher quality programs were associated with wider implementation of parent-child interactive homework, higher levels of parent volunteering, and more parents on school decision-making committees. Results identify factors that could help schools develop quality partnership programs and suggest that these programs translate into higher levels of family involvement in students’ learning.     

关于中职学校作文教学设计的思考

中职学校作文教学存在着诸多问题。要从这些实际问题研究应对策略，强化作文教学设计。倡导在作文教学中进行目标设计、内容设计、方法设计和思路设计。     

对老年人骨矿含量、体成分和肌力的特征研究

选取北京市５５岁以上老年人８６名进行研究，结果发现５５岁以上老年人骨矿含量、体成分和最大肌力存在明显的性别差异。骨矿含量随着年龄增加而逐年降低，女性下降的幅度明显高于男性。骨矿含量与体脂百分比呈明显的负相关，与体重，身体密度、瘦体重和最大肌力呈正相关，与肌肉耐力无明显的关系。     

补充糖+乳清蛋白对业余足球运动员运动能力影响的研究

目的:普通高校业余足球队运动员在备战广东省第7届大学生运动会训练期间,观察补充低聚糖 乳清蛋白(4:1)饮料对体成分、部分血生化指标和运动能力的影响。方法:16名男性普通高校业余足球队运动员随机分成对照组(n=8)和实验组(n=8),进行为期12周的实验,实验组运动员在每天训练前即刻、训练后1h内和临睡前,择时补充糖 乳清蛋白,对照组运动员则补充纯净水,实验前后分别进行体成分、血生化指标和体能测试,并统计整个大运会每场比赛结果。结果:足球运动员补充低聚糖加乳清蛋白能有效地保护红细胞功能,预防血红蛋白水平的下降,同时可提高体能、促进疲劳的消除,对维持肌肉微结构有积极作用。     

展望未来的编辑工作

科学技术的高度发展,推动着各行各业前进的步伐,同时也促使期刊编辑工作必须面向未来那样一个瞬息万变的信息时代。本文提出了如何把握作者的专业化加深的必然趋势,加强编辑自身的专业素质和职业职责的培养;如何适应高速发展的科技信息,运用科学的方法,预测未来的学术动态,确保学术论文的实用性和时效性;如何正确对待学术的国际性,采取多种有效手段,促成学术论文的进一步开放与交流。并探讨了编辑与作者的合作将走向一体化的趋势;同时论述了现代科技成果和科技手段对未来编辑工作的影响,指出了编辑工作的未来,任重道远,尚须努力。     

Considerations for protein intake in managing weight loss in athletes

Abstract

A large body of evidence now shows that higher protein intakes (2–3 times the protein Recommended Dietary Allowance (RDA) of 0.8 g/kg/d) during periods of energy restriction can enhance fat-free mass (FFM) preservation, particularly when combined with exercise. The mechanisms underpinning the FFM-sparing effect of higher protein diets remain to be fully elucidated but may relate to the maintenance of the anabolic sensitivity of skeletal muscle to protein ingestion. From a practical point of view, athletes aiming to reduce fat mass and preserve FFM should be advised to consume protein intakes in the range of ～1.8–2.7 g kg^?1 d^?1 (or ～2.3–3.1 g kg^?1 FFM) in combination with a moderate energy deficit (?500 kcal) and the performance of some form of resistance exercise. The target level of protein intake within this recommended range requires consideration of a number of case-specific factors including the athlete's body composition, habitual protein intake and broader nutrition goals. Athletes should focus on consuming high-quality protein sources, aiming to consume protein feedings evenly spaced throughout the day. Post-exercise consumption of 0.25–0.3 g protein meal^?1 from protein sources with high leucine content and rapid digestion kinetics (i.e. whey protein) is recommended to optimise exercise-induced muscle protein synthesis. When protein is consumed as part of a mixed macronutrient meal and/or before bed slightly higher protein doses may be optimal.