Walking versus biofeedback: a comparison of acute interventions for stressed students

Background: High rates of stress-related problems in college students and low utilization of treatment options demonstrate the need for effective stress-reducing interventions that can be self-regulated. This study compared the effect of brief paced-breathing with biofeedback and exercise interventions on heart rate variability, state anxiety and affect. Methods: Students (n?=?32) with high levels of perceived stress completed three 10-min interventions on separate days: paced-breathing with biofeedback (Biofeedback), a self-paced walk (Exercise), and an attention control condition of quiet studying (Quiet Study). Anxiety and affect were measured before (Pre), immediately after (Post0) and 15 mins after (Post15) the intervention. Heart rate variability was measured pre- and post-intervention using electrocardiogram. Results: Biofeedback reduced anxiety more than the exercise condition (Pre to Post0: Biofeedback d?=??0.48, Exercise d?=??0.13). Secondly, Exercise temporarily increased energy (Pre to Post0: d?=?0.67), whereas Biofeedback temporarily increased calmness (Pre to Post0: d?=?0.51). All conditions significantly increased total heart rate variability (p?Conclusions: Biofeedback and Exercise interventions improved emotional states in high-stress college students, but the type of change observed (i.e. energizing, calming or anxiety reducing) depended upon the condition.     

The Effects of Task Type on Time to Task Failure During Fatigue: A Modified Sørensen Test

Understanding mechanisms of fatigue of the trunk extensors is important because fatigue is a major factor in predicting incidence of low back pain, but few studies have examined trunk extensor fatigue muscles using differing load types and measured the amplitude and frequency domain of the electromyographic signal to explain these differences. Sixteen healthy participants performed position- and force-matching fatigue tasks in a modified Sørensen test position. Time to task failure was significantly longer during the position-matching task compared to force-matching task (58.3 ± 6.6 min vs. 36.1 ± 5.4 min). This finding is the opposite of that commonly reported for the appendicular muscle, but the mean power frequency shifts and muscle activation patterns of the trunk and hip extensors did not explain this difference. The mean power frequency shifts and muscle activation patterns of the trunk and hip extensors did not explain this difference. The greater time to task failure during the position-matching task may reflect adaptation of the trunk extensor muscles to optimize maintaining specific joint angles more so than specific loads.     

左向右分流型先天性心脏病心力衰竭时神经内分泌失调及对策

左向右分流型先天性心脏病是引起小儿心力衰竭(心衰)主要病因之一。研究已证实神经内分泌紊乱与心衰之间有复杂的相关性。临床应用神经内分泌紊乱拮抗剂,如β-受体阻滞剂、洋地黄制剂、血管紧张素转换酶抑制剂(ACEI)能降低此类患儿心衰的病死率。就此类型先心病出现心衰时神经内分泌紊乱现象及治疗对策的综述。     

Recommendations from Multi-disciplinary Focus Groups on Cascade Testing and Genetic Counseling for Fragile X-associated Disorders

The purpose of this paper is to report the outcome of a collaborative project between the Fragile X Research and Treatment Center at the Medical Investigation of Neurodevelopmental Disorders (M.I.N.D.) Institute at the University of California at Davis, the National Fragile X Foundation (NFXF), and the Centers for Disease Control and Prevention (CDC). The objective of this collaboration was to develop and disseminate protocols for genetic counseling and cascade testing for the multiple disorders associated with the fragile X mental retardation 1 (FMR1) mutation. Over the last several years, there has been increasing insight into the phenotypic range associated with both the premutation and the full mutation of the FMR1 gene. To help develop recommendations related to screening for fragile X-associated disorders, four, two day advisory focus group meetings were conducted, each with a different theme. The four themes were: (1) fragile X-associated tremor/ataxia syndrome (FXTAS); (2) premature ovarian failure (POF) and reproductive endocrinology; (3) psychiatric, behavioral and psychological issues; and (4) population screening and related ethical issues.     

不同干预方式、不同应激源对血压、心率的影响

探讨不同干预方式、不同应激源对血压、心率影响的差异。被试为本科生48人,采取干预方式、应激源、实验间期的三因素混合实验设计。干预方式为放松训练和预知,应激源为心算和恐怖影片。实验间期包括基线期、干预期、应激期、恢复期。实验的因变量为每个实验间期的血压和心率。结果显示,心算应激引起的血压和心率升高显著高于恐怖影片应激引起的血压和心率的升高;放松训练组和预知组其干预期的血压和心率值都低于基线期;干预方式和应激源在血压和心率两个指标上交互作用不显著。结果表明,与恐怖情绪引起的紧张相比较,智力操作紧张更容易影响血压和心率;放松训练和预知对于对抗应激时血压和心率升高都起到了一定的作用;不同干预方式对于不同性质的应激源作用没有差别。     

Achievement motivation in the social context: Implicit and explicit Hope of Success and Fear of Failure predict memory for and liking of successful and unsuccessful peers

The authors examined relations between implicit and explicit Hope of Success (HS) and Fear of Failure (FF) and memory and liking for successful and unsuccessful peers. Implicit motives were expected to predict memory and explicit motives to predict liking of peers. Results from 106 American and 79 Singaporean students supported the implicit–explicit motive distinction as well as a link between HS and the successful peer and between FF and the unsuccessful peer. In both samples, explicit HS predicts liking while implicit HS predicts memory about the successful peer, and implicit FF predicts memory about the unsuccessful peer. Findings indicate achievement motives affect interest in and reaction towards peers and provide evidence for differential validity of implicit and explicit motives.     

防治血管剩留风险的决策探讨

针对冠心病和（或）2型糖尿病患者,已有许多有效的防治措施。然而,尽管接受了当前的标准治疗,这类患者仍会反复发生许多大血管和微血管事件,这种现象称之为血管剩留风险。有许多因素影响血管剩留风险的存在,其中最为重要的是致动脉粥样硬化性血脂异常。因此,采取积极的全面干预措施如改善生活方式、联合降脂以改善所有的脂质异常指标,是最大程度降低血管剩留风险的动向。     

幽门螺杆菌根除失败原因及补救策略分析

幽门螺杆菌（Hp）与胃炎、消化性溃疡、胃黏膜相关淋巴组织淋巴瘤及胃癌关系密切。随着根除Hp治疗在临床的普遍开展,Hp根除率逐渐下降,其主要原因是日益突出的抗生素耐药及患者对药物依从性差。对根除治疗失败者进行补救治疗已成为Hp治疗研究领域的新热点。由于各地的Hp耐药率及感染者个体情况存在很大差异,目前尚未形成统一规范的补救策略,遵循个体化的补救策略已逐渐被大家所接受。