Short-term heat acclimation prior to a multi-day desert ultra-marathon improves physiological and psychological responses without compromising immune status     

Ashley G. B. Willmott  Mark Hayes  Kirsty A. M. Waldock  Rebecca L. Relf  Emily R. Watkins  Carl A. James 《Journal of sports sciences》2017,35(22):2249-2256

Multistage, ultra-endurance events in hot, humid conditions necessitate thermal adaptation, often achieved through short term heat acclimation (STHA), to improve performance by reducing thermoregulatory strain and perceptions of heat stress. This study investigated the physiological, perceptual and immunological responses to STHA prior to the Marathon des Sables. Eight athletes (age 42 ± 4 years and body mass 81.9 ± 15.0 kg) completed 4 days of controlled hyperthermia STHA (60 min·day^?1, 45°C and 30% relative humidity). Pre, during and post sessions, physiological and perceptual measures were recorded. Immunological measures were recorded pre-post sessions 1 and 4. STHA improved thermal comfort (P = 0.02), sensation (P = 0.03) and perceived exertion (P = 0.04). A dissociated relationship between perceptual fatigue and T_re was evident after STHA, with reductions in perceived Physical (P = 0.04) and General (P = 0.04) fatigue. Exercising T_re and HR did not change (P > 0.05) however, sweat rate increased 14% (P = 0.02). No changes were found in white blood cell counts or content (P > 0.05). Four days of STHA facilitates effective perceptual adaptations, without compromising immune status prior to an ultra-endurance race in heat stress. A greater physiological strain is required to confer optimal physiological adaptations.  相似文献   

Modernising gender,civilising sex: perverse imaginary in the state feminist politics of Liu Yu‐hsiu     

Hans Tao‐Ming Huang 《Inter-Asia Cultural Studies》2013,14(4):540-558

Abstract

The gender sexual politics of Liu Yu‐hsiu has been pivotal in the hegemonic ascendancy of Taiwan state feminism in recent years. Through an examination of Liu’s psychoanalytically mediated essays of cultural criticism, this article traces the contour of Liu’s sexual imaginary within the context of 1990s feminist and queer politics. Liu’s modernising project of gender equality, I argue, upholds heterosexual monogamy as a feminist ideal that seeks to purge all the masculine ills, including perversion and promiscuity. Meanwhile, queers and prostitutes come to be figured as the very negativity that must be repressed. Yet, like the Lacanian Real, they impinge on the symbolic order that Liu ordains as they thwart her desire to civilise sex.  相似文献   

大学生参与休闲体育行为意向模式研究     

魏烨 《体育科技》2014,(1):102-104

探讨影响大学生参与休闲体育行为意向的因素,采用问卷调研法对354名大学生进行测量,将影响大学生参与休闲体育的因素,运用计划行为理论与线性结构方程式统计分析,找出影响大学生参与休闲体育行为意向构面的影响力度。实证结果:态度、主观规范和知觉行为控制对行为意向有直接的显著影响,可以解释其参与休闲体育行为意向的0.37;情感性信念和工具性信念对态度有显著影响,可以解释其参与休闲体育态度的0.22;主体群和次体群对主观规范有显著影响,可以解释其参与休闲体育主观规范的0.35;便利条件和自我能力对知觉行为控制有显著影响,可以解释其参与休闲体育知觉行为控制的0.68。研究提出了提高大学生参与休闲体育的行为意向策略。  相似文献   

武术套路训练中运动员自我效能感的形成及培养途径   总被引：1，自引：0，他引：1  

王宾 《搏击·武术科学》2009,6(12):48-49

自我效能感是心理学和社会学的重要概念,在竞技武术套路中,运动员的自我效能感对运动员的训练、比赛有着很重要的作用。文章运用文献资料法和逻辑分析的研究方法,以自我效能感创始人班杜拉的自我效能理论为依据,探讨了影响竞技武术套路运动员自我效能感形成的因素及如何培养和提高竞技武术套路运动员的自我效能感,找出在竞技武术套路训练中可以遵循和有效的培养途径,对提高竞技武术套路运动员的训练质量和对未来比赛充满信心有一定的作用。  相似文献   

Perceived Social Support and Mental Health: Cultural Orientations as Moderators     

《Journal of College Counseling》2017,20(3):194-207

This study investigated unique and shared effects of social support and cultural orientation on mental health indicators (depressive and anxiety symptoms, stress, and life satisfaction) of 896 college students. Results indicated that perceived social support predicted mental health variables and that cultural orientation variables (independent and interdependent self‐construal) moderated this association. Conclusions and counseling implications for university counselors are discussed on the basis of cultural orientation theory.  相似文献   

基于信息风险感知的社交网络舆情传播模型研究     

成俊会  赵金楼 《情报杂志》2015,(1)

结合实际的社交网络使用行为,在分析社交网络舆情传播模式的基础上,构建了社交网络舆情传播模型。详细分析了影响传播概率的主要因素,建立了以信息风险感知为主的传播概率的数学模型。仿真结果表明：获知概率的大小对舆情传播规模、弛豫时间均有影响;而信息风险感知的大小对舆情传播规模的影响不大,对弛豫时间的影响较大,究其根源在于信息风险感知直接决定了传播概率的取值,而传播概率直接决定了网络中传播者的数量。  相似文献   

互联网金融理财产品使用影响因素研究     

邱均平  杨强  郭丽琳 《情报杂志》2015,(1)

依据TAM和TPB模型,按照金融的流动性、收益性和安全性三原则,验证用户使用互联网金融理财产品的关键影响因素。以余额宝为例,收集224个量表作为样本,使用PLS方法,验证互联网金融理财产品结构化方程模型。研究发现,自我效能、感知易用、感知有用在用户使用互联网金融理财产品的影响因素中起着关键作用。自我效能对感知易用、感知有用和使用行为的影响显著。社会影响对用户感知风险和行为意向影响显著,但是影响低于自我效能。  相似文献   

Schools, ‘ferals’, stigma and boundary work: parents managing education and uncertainty in regional Australia     

Rose Butler 《Ethnography and Education》2015,10(3):340-355

This paper examines forms of boundary work undertaken by parents in a regional Australian city to negotiate social processes around the school market amidst rising economic insecurity. It outlines structural changes, which have increased economic inequality in Australia and impacted on educational reform, and the specific challenges faced by public schools in regional settings. Drawing on 18 months’ qualitative research in one regional location, it identifies and analyses forms of boundary work undertaken by middle-class families to manage these uncertainties in a field of scarce economic and cultural resources. Theories of class culture, stigma and whiteness are used to show how local social labels such as ‘ferals’ and ‘shiny people’ acted as classed and racialised ways of negotiating this social and economic landscape through the school field. Such practices engendered feelings of security and control and shed light on feelings of class-based resentment and anxiety in regional Australia, specifically a middle-class ‘fear of falling’.  相似文献   

Perceived severity of school bullying in elementary schools based on participants’ roles     

Li Ming Chen  Wen Cheng 《教育心理学》2015,35(4):484-496

The purpose of this study was to examine the perceived severity of school bullying among participants with different roles (victims, bullies, bullies/victims and non-involved individuals) and to determine whether interactions between type of bullying and participant roles exist. Two Olweus-like global items and a revised School Bullying Severity Scale for elementary students were used in this study. A total of 1816 valid surveys completed by students in grades 5 and 6 (mean age = 11.5, SD = .84) were collected. Data were analysed using a mixed-model two-way ANOVA. The results revealed a significant main effect of type of bullying. Physical and verbal bullying were perceived as more severe than relational and cyberbullying. A significant two-way interaction between bullying category and participant role was also identified. Bullies did not perceive the four types of victimisation behaviours differently, whereas victims and bullies/victims both rated physical victimisation as most severe and cyber-victimisation as least severe. However, effect sizes were small. Implications for bullying prevention and intervention are discussed.  相似文献   

有氧运动强度监测指标特征分析与研究     

武春英 《茂名学院学报》2015,(3):81-85

研究了运动指标中的心率、代谢当量、主观感觉程度与运动能量消耗等指标特征,首先,从心率对运动负荷的基本应答特征、运用目标心率安排锻炼负荷强度、心率测量的特征、心率的运动强度监测等方面分析了心率指标特征;其次,阐述了代谢当量指标与主观感觉程度特征及其分级指标;再次,从气体代谢分析仪与心率测试法等方面分析了运动能量消耗测定方法;最后进行了总结与建议。  相似文献