‘I didn’t realise I was such a sausage’: men’s accounts of whole-body scanning,body image,and expected changes in health-related behaviours

Objective: Whole-body scanning is now available in stores to assist buyers in choosing well-fitting clothes. This study was designed to investigate men’s accounts of scanning, body image and expectations of behaviour change. Design: Ten men aged 18–39 years without histories of eating disorders or previous experience of whole-body scanning, took part in semi-structured interviews before and after scanning. Data were analysed using inductive thematic analysis. Results: Pre-scan, men’s body ideals were tall, slender and relatively muscular. Post-scan, seven reported looking shorter, fatter, thinner and/or less symmetrical than they hoped; three were pleasantly surprised by the images. Men were interested in scans as an objective view of their bodies and as a ‘wake-up call’ to motivate healthy behaviours. Five men intended to change their behaviour as a result of scanning, and repeat scanning was seen as a good way to monitor behavioural changes. Participants suggested that scanning may raise body concerns in other men, though downplayed impacts on their own body image. Conclusion: Whole-body scanning may encourage men to exercise and eat more healthily. However, men became more negative about their bodies as a result of seeing their body scans, so scanning needs to be carried out with supervision and support.     

Group structure and entitativity in group fitness: considering groupness at within- and between-group levels

Objective: How can we distinguish between a collection of individuals exercising alongside one another from group that is exercising ‘together’? This question is central to research on the extent that individuals perceive their fitness settings to entail core features of groups. To advance understanding of the nature of groupness and its implications in exercise, the current study (a) evaluated a brief measure of groupness and (b) examined the extent that groupness predicted perceptions of exertion and affect.

Design: Participants included 633 exercisers (M_age?=?33.92, SD?=?11.05, 74% female) who completed surveys after group fitness classes (k?=?34).

Main outcome measures: Groupness, affect, exertion, and group cohesion.

Results: Exploratory structural equation modelling provided support for a two-factor solution reflecting entitativity and group structure as subdimensions of groupness. The groupness factors were differentially associated with theoretically relevant aspects of classes (e.g. synchronised movement), the individual (e.g. number of members interacted with), as well as group cohesion. Groupness also predicted perceived exertion and affect.

Conclusion: Our research provides support for a brief measure of groupness, advances theory related to how individuals perceive exercise groups, and provides evidence regarding how broader experiences during exercise may relate to exercisers’ perceptions of groupness.     

Constant vigilance: Heritage values and defensive pessimism in coping with severe acute respiratory syndrome in Singapore

The present study investigates the congruency of defensive pessimism in the Asian context and its role in coping with the severe acute respiratory syndrome (SARS) crisis in Singapore. Data collected from 174 Singaporeans supported the hypothesized relationships among Chinese values, defensive pessimism, SARS-related fears, compliance to preventive health-related behaviors and negative outcomes. Path analysis revealed that individuals' endorsement of Chinese value clusters − prudence, industry, and civic harmony − positively predicted their levels of defensive pessimism. The results also indicated that defensive pessimism had a direct positive effect on SARS-related fears and, SARS-related fears, in turn, were directly related to direct preventive health-related behaviors but not related to indirect preventive behaviors. In addition to the indirect effect of Chinese values on direct preventive health-related behaviors, Chinese values had a direct positive effect on both direct and indirect preventive health-related behaviors. Consistent with our contention that defensive pessimism has the potential for leading to particular negative outcomes, defensive pessimism was found to influence negative outcomes but this relationship was partially mediated by SARS-related fears.     

Biases in the perceived prevalence and motives of severe acute respiratory syndrome prevention behaviors among Chinese high school students in Hong Kong

In two studies conducted in Hong Kong during and immediately after the outbreak of severe acute respiratory syndrome (SARS), participants displayed several social cognitive biases when they estimated the prevalence of and inferred the motives underlying SARS preventive behaviors. First, participants who practiced preventive behaviors (practicers) consistently estimated that more people practiced such behaviors than did non-practicers (false consensus bias). Second, for some preventive behaviors, participants believed that their own behaviors were more motivated by prosocial concerns (relative to self-interest) than were other practicers (pluralistic ignorance). Finally, non-practicers underestimated the importance of prosocial concerns underlying some preventive behaviors (actor-observer bias). We discussed the relevance of these social cognitive biases to health education and to Hong Kong people's psychological reactions to SARS.     

有氧运动对记忆的影响及其神经生物学机制

有氧运动是氧气充足时运用大型肌肉群进行有节奏的持续运动。有氧运动可以加快工作记忆任务中的反应速度;在记忆编码前和记忆巩固阶段进行高强度有氧运动有助于提升情景记忆;高强度有氧运动可以促进内隐记忆。有氧运动可以促进神经营养因子的产生,引起长时程增强,激活海马等与记忆相关的脑区并促进神经元再生。未来可探究有氧运动开始和持续时间的影响、有氧运动强度和认知参与的影响、有氧运动对不同年龄性别群体的影响以及脑源性神经营养因子的中介作用,从而深入揭示有氧运动对记忆的影响及其神经生物学机制。     

Metacognitive processes in the self-regulation of performance in elite endurance runners

ObjectiveThis study sought to investigate the dynamics of attentional focus and cognitive control during endurance activity from a metacognitive perspective. The study also intended to examine the situational factors which may influence cognitive strategy use by elite endurance runners.DesignSemi-structured qualitative interviews were utilised.MethodTen elite-level endurance runners were interviewed to explore retrospectively their attentional focus and cognitive strategy use during endurance running.ResultsThe findings revealed that metacognitive strategies such as planning, monitoring, reviewing and evaluating, and metacognitive experiences were fundamental to cognitive control and cognitive strategy use in elite endurance runners. The findings also added to the array of active self-regulatory strategies previously reported in the literature.ConclusionsThese results suggest that metacognitive processes are central to effective cognitive control in elite endurance athletes during running. The findings allowed for the development of an integrative metacognitive framework, which incorporates dimensions of attentional focus. This model may better represent the processes which underpin cognitive control and determine cognitive strategy use in elite athletes during endurance running.     

Window view of nature after brief exercise improves choice reaction time and heart rate restoration

Research indicates that natural environments induce restorative effects on cognitive capacity and autonomic arousal. The present study investigates differences in choice reaction time (CRT) and heart rate responses in students (n = 9) resting with or without a window view of a modest natural environment after a physical exertion. Subjects performed a CRT-task before pedaling a spinning bike, followed by resting in a chair with either a window view of a natural environment, or no view. Heart rate was obtained during the rest-period, and the CRT task was performed again immediately after resting.Results indicated that subjects elicited significantly larger improvement in CRTs and more efficient heart rate restoration after resting with a window view, compared to resting without a view. Resting with a modest view of a natural environment after brief exercise demonstrated both a greater effect of cognitive enhancement and more efficient physiological restoration compared to resting without a view. These findings advance prior research by demonstrating both cognitive and physiological benefits from resting in a modest natural environment.     

Are self-perceptions of ageing modifiable? Examination of an exercise programme with vs. without a self-perceptions of ageing-intervention for older adults

Objective: Longitudinal studies have consistently shown beneficial effects of positive self-perceptions of ageing (SPA) on health. However, SPA are more often negative than positive, particularly in older adults. For this reason, the present study tested the effectiveness of an intervention to promote more positive SPA in the context of an exercise programme for older adults.

Design: Eighty-four community-dwelling older adults (66-88 years; M(SD)=76.8(5.29)) were randomly assigned to a group-based exercise programme over 12 weeks with (n?=?46) or without (n?=?38) a psychological intervention to change SPA, consisting of four intervention units over the programme period.

Main Outcome Measures: A gain- and a loss-related domain of SPA were assessed at baseline, after the first half of the programme, directly after the programme and in a follow-up four weeks later.

Results: Latent change score models showed an improvement of participants’ SPA in the intervention group in both SPA domains after the programme, whereas SPA did not change in the control group. Both groups showed an improvement in physical performance, however, only the IG showed additional improvements in mental health.

Conclusion: The implementation of an SPA intervention is a promising approach in regular health promotion programmes for older adults.