办好教学期刊要素论略

教学期刊的生存和发展,要求编辑有较高的文化职业素养;编辑团队合作共事,充满活力;刊物内容贴近教学,特色鲜明,凸显传播个性;期刊要有源头活水,重视和参与教学研究,开发和培育作者,塑造着作者,也就打造着刊物。     

Running into trouble: constructions of danger and risk in girls' access to outdoor space and physical activity

This paper considers girls' participation in running and other outdoor physical activities in their local areas in London, UK. The paper is concerned with the operation of risk discourses in and around this participation and looks at the way that such discourses impacted on girls' opportunities to take part in physical activities that required outdoor space. Drawing on data from longitudinal research into girls' participation in sport and physical activity, the findings suggested that girls, in particular, were subject to risk discourses around their participation in physical activities which constructed the girls as ‘weak’, and ‘vulnerable’. I look at the ways in which girls understood these messages and how they came to define certain spaces and activities as either ‘safe’ or ‘unsafe’. I look in particular at how girls were able to resist certain constructions of their embodied physical capacities and also at the ways in which this was constrained by specific incidences of sexual harassment.     

What about sport? A public health perspective on leisure-time physical activity

In an effort to determine how sport could be better positioned on the public health agenda, three community physical activity programs aimed at combating obesity were examined to determine the benefits residents seek through their participation. Using a case study approach and critical framework, assumptions and presumed knowledge of these public health programs were drawn out through site visits and interviews. A total of 42 interviews with community leaders, program organizers, and residents in each community were conducted. The results reveal that new approaches need to be considered for promoting greater levels of participation in U.S. community sport and other leisure-time physical activity programs. Instead of the commonly emphasized benefits of physical health or appearance, the results demonstrate that hedonic rewards and opportunities for social interaction are two overlooked, yet primary benefits sought by participants. This research suggests that concerted efforts to focus on the hedonic feelings and social aspects can potentially lead to increased sport participation and holistic health. Such an approach may help better address vital public health policy issues while demonstrating the distinctiveness and utility of sport.     

Determination of Biological Variance and Validation of a Fluorometric Assay for Measurement of α-l-Iduronidase Activity in Dried Blood Spots Samples: The First Experience in Iran

Methods for assaying lysosomal diseases in dried blood samples are very useful today due to its several advantages related to the stability of samples, its transportation, handled and analysis, and its potential use for newborn screening compared to traditional methods in leucocytes samples. For this reason, it is important to validate these assays before being used in routine laboratory. Because of different in biological markers based on ethnicity, we aimed this study to validation a DBS-based fluorometric assay for measurement of α-l-Iduronidase activity for diagnosis of MPS I patients in Iran. DBS samples were collected from 15 MPS I patients and 60 healthy age matched subjects. Diagnostic value, biological variance and α-l-Iduronidase activity were determined. DBS α-l-Iduronidase activity was significantly higher in male subjects than in female group. Using a cut-off level of 1.08 µmol/spot 20 h, sensitivity and specificity were 100 and 98 %. The linearity of test was proved and we showed that within-run and between run precision were 5.6 and 14.66 %. Measurement of α-l-Iduronidase activity in DBS samples is an accurate test for diagnosis of MPS I and because of its rapid shipping and simplicity to keeping, DBS-based enzyme activity could be considered as a useful diagnostic tool in this disease.     

青少年运动缺乏症研究的10大问题

摘要：运动缺乏症（EDD）是一种儿科疾病,特点是中高强度体力活动（MVPA）下降,低于目前的推荐量,也与积极的健康结果（health outcomes）不一致。目前,大多数儿童和青少年符合EDD的诊断标准,因为他们没有达到日常MVPA的最低要求。本文的目的是强调10个与青少年EDD有关的重要研究问题。需要进行重要的研究来更好的定义EDD的临床表现,包括评估体力活动行以确定开始出现EDD的年龄或发育阶段;包括运动技巧和体能的运动起源（kinesiogenesis）的检测;以及对影响青少年MVPA的生活方式因素的评估。关于治疗EDD的干预措施和政策的研究问题,包括评估对卫生保健从业者进行运动医学重要性的教育和训练;确定在临床上识别和治疗EDD青少年的方法的有效性;开发敏感的、特效的、经济的方法以诊断青少年EDD;以及定制方法以促进本病诊疗的医疗保险赔付。如果未来研究不能优化EDD青少年的识别、治疗和管理方案,具有重大影响的生物医学、心理、经济和政治的新的卫生保健问题将会不断出现。     

Tracking of physical activity in pubertal boys with different BMI over two-year period

We examined the tracking of physical activity (PA) measured by accelerometers and subjective self- and parental reports in normal weight and overweight and obese pubertal boys over two-year period. In total, 156 boys with mean (±SD) age of 11.53 ± 0.76 at baseline and with mean age of 13.94 ± 0.74 at 2 year follow-up were studied. At baseline and approximately two years later, the boys completed self-report questionnaire and wore an accelerometer for seven consecutive days. On the basis of first year assessment’s body mass index (BMI), the children were grouped as normal weight and overweight and obese groups according to BMI cut-offs. Tracking correlations of objectively measured PA and subjectively measured PA were fairly similar across the 12–14 year-old-boys weight groups over two year period. Tracking correlations of objectively measured PA and subjectively measured PA were not significantly different over two-year period between both BMI groups. The results of the study show that pubertal boys objectively measured PA decreased over two-year period and so the boys started to be less active in their pubertal period.     

Lifesource XL-18 pedometer for measuring steps under controlled and free-living conditions

The primary aim was to examine the criterion and construct validity and test–retest reliability of the Lifesource XL-18 pedometer (A&D Medical, Toronto, ON, Canada) for measuring steps under controlled and free-living activities. The influence of body mass index, waist size and walking speed on the criterion validity of XL-18 was also explored. Forty adults (35–74 years) performed a 6-min walk test in the controlled condition, and the criterion validity of XL-18 was assessed by comparing it to steps counted manually. Thirty-five adults participated in the free-living condition and the construct validity of XL-18 was assessed by comparing it to Yamax SW-200 (YAMAX Health & Sports, Inc., San Antonio, TX, USA). During the controlled condition, XL-18 did not significantly differ from criterion (P > 0.05) and no systematic error was found using Bland–Altman analysis. The accuracy of XL-18 decreased with slower walking speed (P = 0.001). During the free-living condition, Bland–Altman analysis revealed that XL-18 overestimated daily steps by 327 ± 118 than Yamax (P = 0.004). However, the absolute percent error (APE) (6.5 ± 0.58%) was still within an acceptable range. XL-18 did not differ statistically between pant pockets. XL-18 is suitable for measuring steps in controlled and free-living conditions. However, caution may be required when interpreting the steps recorded under slower speeds and free-living conditions.     

Validation of two accelerometers to determine mechanical loading of physical activities in children

The purpose of this study was to assess the validity of accelerometers using force plates (i.e., ground reaction force (GRF)) during the performance of different tasks of daily physical activity in children. Thirteen children (10.1 (range 5.4–15.7) years, 3 girls) wore two accelerometers (ActiGraph GT3X+ (ACT), GENEA (GEN)) at the hip that provide raw acceleration signals at 100 Hz. Participants completed different tasks (walking, jogging, running, landings from boxes of different height, rope skipping, dancing) on a force plate. GRF was collected for one step per trial (10 trials) for ambulatory movements and for all landings (10 trials), rope skips and dance procedures. Accelerometer outputs as peak loading (g) per activity were averaged. ANOVA, correlation analyses and Bland–Altman plots were computed to determine validity of accelerometers using GRF. There was a main effect of task with increasing acceleration values in tasks with increasing locomotion speed and landing height (P < 0.001). Data from ACT and GEN correlated with GRF (r = 0.90 and 0.89, respectively) and between each other (r = 0.98), but both accelerometers consistently overestimated GRF. The new generation of accelerometer models that allow raw signal detection are reasonably accurate to measure impact loading of bone in children, although they systematically overestimate GRF.     

消费者参与对体育品牌企业社会责任活动效果的影响机制研究

体育品牌履行企业社会责任(CSR)的压力日益增加,但实践效果并不理想,CSR活动与消费者隔离是一个重要原因。通过两个实验研究,揭示了消费者参与对体育品牌CSR活动的影响,结果发现,1)消费者参与体育品牌CSR活动会提高其品牌态度和购买意向;2)企业社会责任认同在上述过程中起到中介作用;3)这一中介作用受到消费者对CSR活动与体育品牌之间感知匹配度的调节;讨论了对体育品牌CSR战略实践的启发。     

影响弱势群体参与体育活动结果的归因及改善对策研究

弱势群体参与体育活动的结果,反映他们自身对体育健身的需要,也反映他们参与全民健身的强烈欲望,从弱势群体参与体育活动的必要性、影响弱势群体参与体育活动的归因分析、改善"弱势群体"参与体育锻炼不良的归因对策方面进行研究,挖掘与发展体质弱势群体潜在的运动能力,为他们"健康工作五十年"、"幸福生活一辈子"打下坚实的基础。