对苏州大学2002级学生身体发育状况的研究

通过对苏州大学 2 0 0 2级大学生的身高、体重指标以及派生BMI指数的研究发现 :苏州大学学生的指标均优于全国水平 ,且两者间具有显著性差异 ;针对《学生体质健康标准》的身高体重指数的评定等级进行研究 ,认为评价指标存在不和理之处 ,应考虑我国人群分布的地域特征 ,适当调整身高体重指数的评定标准。     

网上考试系统的评价研究

网上考试系统是网络教学的重要组成部分。该文分析了网上考试系统的特点和流程,构建了网上考试系统综合评价的指标体系,并用问卷统计法确定了指标体系的权重数。     

举重竞赛中运动员称重后到出场前阶段能量补充的探讨

通过文献综述法和专家访谈法就举重运动员称体重后到赛前能量补充进行探讨分析。提出通过合理安排赛前营养的摄入来提高运动员的比赛能力和水平。     

使用不同重量铅球训练时肌肉的电信号特征变化研究

用表面肌电技术对背向滑步式推铅球动作不同重量铅球时的肌肉测试,总结肌肉动员特征并进行相关性分析。结论为,背向滑步式推铅球动作中,主要参与肌肉为右肱二头肌,右三角肌,右股四头肌等等;使用8千克铅球进行训练时,多数体表肌肉肌电信号值比背向滑步式推铅球有明显的增加,部分肌肉的肌电信号衰减。右股四头肌和左背阔肌在使用8千克铅球训练时利于背向滑步式推铅球动作。     

The Effects of Personal and Social Uses of Mobile Health Applications on Healthy Behaviors

In the face of America’s obesity epidemic, mobile health applications (MHAs) offer solutions for motivating users to be healthier. MHAs include both personal features for the individual user (e.g., calorie tracking) and social features, which connect the user to others (e.g., for support or competition). The present study explores the connection between both personal and social uses of MHAs and healthy behaviors. Findings indicate that the use of MHAs is positively associated with healthier overall behaviors: Personal aspects were related to healthier eating and workout behaviors, and social aspects were positively associated with only healthier workout behaviors. Perceptions of social support from others predicted healthier overall behaviors and were related to increased body satisfaction. Implications for the role of social support in MHAs are discussed.     

一类积分算子在加权Campanato空间的有界性(英文)

本文证明了下述结果:在适当条件下,若f∈ε_(?)～(?)(?),则g(f)(x)(s(f)(x),μ(f)(x))=∞,a,e.x∈R～(?)或g(f)(x)(s(f)(x),g_(?)～(?)(f)(x),μ(f)(x))<∞,a,e.x∈R～(?),在后一种情形,我们有g(f)(s(f),g_(?)～(?)(f),μ(f))∈ε_(?)～(?)(?)且‖g(f)‖(?)(‖s(f)(?)‖g_λ～(?)(f)‖(?)‖μ(f)‖(?))≤c‖f‖(?)其中C是不赖于f(x)的常数.     

体育教育专业体操普修课成绩评价的调查结果与评价体系

采用调查法,对北京体育大学、沈阳体育学院、西安体育学院、成都体育学院、武汉体育学院、等11所体育、师范院校体育教育专业的体操普修课程教学大纲与教学计划进行研究与分析。结果表明,体操普修课成绩评价不利于充分调动学生学习的积极性,忽视学生基本技能的培养,评价内容、方法划一,缺乏弹性,缺少顾及学生个体差异,评价重视结果、忽视过程;未能体现"以学生发展为本"的指导思想等主要问题。在对体育教育专业体操普修课学生成绩评价现状进行分析的基础上,构建了体操普修课成绩评价体系。     

Different centre of pressure patterns within the golf stroke II: Group-based analysis

Abstract

Although the golf coaching literature stresses the importance of weight transfer during the swing, research has been conflicting or lacking statistical support. A potential problem with previous studies is that no attempt was made to account for different movement strategies in the golf swing. This study evaluated the relationship between centre of pressure measures and club head velocity within two previously identified swing styles, the “Front Foot” and “Reverse” styles. Thirty-nine Front Foot golfers and 19 Reverse golfers performed swings with a driver while standing on two force plates. From the force plate data, centre of pressure displacement, velocity, range, and timing parameters were calculated. Correlation and regression analysis indicated that a larger range of centre of pressure and a more rapid centre of pressure movement in the downswing was associated with a larger club head velocity at ball contact for the Front Foot group. For the Reverse golfers, positioning the centre of pressure further from the back foot at late backswing and a more rapid centre of pressure transfer towards the back foot at ball contact was associated with a larger club head velocity at ball contact. This study has highlighted the importance of identifying different movement strategies before evaluating performance measures, as different parameters were found to be important for the Front Foot and Reverse styles.     

生酮饮食对体重管理、肌肉合成以及运动表现的影响

自20世纪20年代以来,极低碳水化合物饮食或生酮饮食疗法被应用于癫痫的治疗,甚至在某些情况下能够完全取代药物治疗。1970年以后,这种饮食疗法作为一种肥胖治疗手段而被广泛知晓 。生酮饮食（Ketogenic Diets,KD）是指碳水化合物减少（通常小于20 g/d或低于每天摄入总能量的5%）而蛋白质和脂肪含量相对增加的饮食。目前认为这三大营养物质的重排可以诱导生理性酮症,进而减轻体重。近年来,许多运动员也希望通过生酮饮食减脂以取得更好的运动表现。尽管生酮饮食在体重管理方面作用显著,但它是否能够维持或提高体能表现仍不明确。文章讨论了生酮饮食的代谢效应和潜在风险,以及近期关于生酮饮食对体重减轻、肌肉合成和运动表现影响的研究进展。     

Pediatric health assessments of young children in child welfare by placement type

Objectives

To describe health-related problems across placement types (unrelated foster, kin foster, in-home with birth parent); to examine the association of placement and demographic/child welfare variables (child gender, age, race/ethnicity; caregiver language; type of maltreatment, and length of time receiving services from child welfare) with health-related problems.

Methods

This study utilized a retrospective medical chart review of children less than 6 years old (n = 449) seen at an outpatient child welfare pediatric clinic. Logistic regression modeling was used to estimate odds of having a weight, medical, or provisional developmental delay problem by placement and demographic/child welfare characteristics.

Results

Almost 13% of children in the sample were obese (≥95% age-gender specific percentile) and more than a quarter were overweight/obese (≥85%) while only 7% were underweight (≤5%). Most children (78%) had a physical health diagnosis and 25% were provisionally identified with a developmental delay. No differences between weight diagnoses, type of medical diagnoses, and provisional developmental delay by placement type were found, although children with 3 or more medical diagnoses were more likely to be with kin (p < .05). Children 2 years old or older were more likely to be overweight/obese than children under 2 years old (p < .05) and Hispanic children were more likely to be overweight/obese than non-Hispanic children (p < .01). Length of stay in child welfare was positively related with a medical diagnosis or provisional developmental delay (p < .01).

Conclusions

Results argue for careful assessment of weight, medical, and developmental problems in children active to child welfare, whether residing in their home of origin, with kin, or with unrelated foster parents. The increasing problem of obesity among young children in child welfare warrants further investigation and intervention.

Practice implications

The comprehensive health examination and enhanced health maintenance schedule for children in foster care should be extended to children who remain at home with child welfare services as child welfare involvement rather than placement is related to health-related problems.