No Tunes of Glory: America\u27s Military in the Aftermath of Vietnam (seven book reviews)

Seven book reviews from the symposium, The Military After Vietnam: The Search for Legal Controls

Perceived Exercise Benefits and Barriers of Non-Exercising Female University Students in the United Kingdom

Many individuals do not engage in sufficient physical activity due to low perceived benefits and high perceived barriers to exercise. Given the increasing incidence of obesity and obesity related health disorders, this topic requires further exploration. We used the Exercise Benefits/Barriers Scale to assess perceived benefit and barrier intensities to exercise in 200 non-exercising female university students (mean age 19.3 years, SD = 1.06) in the UK. Although our participants were selected because they self reported themselves to be non-exercising, however they reported significantly higher perceived benefits from exercise than perceived barriers to exercise [t(199) = 6.18, p < 0.001], and their perceived benefit/barrier ratio was 1.33. The greatest perceived benefit from exercise was physical performance followed by the benefits of psychological outlook, preventive health, life enhancement, and then social interaction. Physical performance was rated significantly higher than all other benefits. Psychological outlook and preventive health were not rated significantly different, although both were significantly higher than life enhancement and social interaction. Life enhancement was also rated significantly higher than social interaction. The greatest perceived barrier to exercise was physical exertion, which was rated significantly higher than time expenditure, exercise milieu, and family discouragement barriers. Implications from this investigation for the design of physical activity programmes include the importance, for females, of a perception of high benefit/barrier ratio that could be conducive to participation in exercise. Applied interventions need to assist female students to ‘disengage’ from or overcome any perceived ‘unpleasantness’ of physical exertion during physical activity (decrease their perceived barriers), and to further highlight the multiple health and other benefits of regular exercising (increase their perceived benefits)

Edge enhancement improves disruptive camouflage by emphasising false edges and creating pictorial relief

Disruptive colouration is a visual camouflage composed of false edges and boundaries. Many disruptively camouflaged animals feature enhanced edges; light patches are surrounded by a lighter outline and/or a dark patches are surrounded by a darker outline. This camouflage is particularly common in amphibians, reptiles and lepidopterans. We explored the role that this pattern has in creating effective camouflage. In a visual search task utilising an ultra-large display area mimicking search tasks that might be found in nature, edge enhanced disruptive camouflage increases crypsis, even on substrates that do not provide an obvious visual match. Specifically, edge enhanced camouflage is effective on backgrounds both with and without shadows; i.e. this is not solely due to background matching of the dark edge enhancement element with the shadows. Furthermore, when the dark component of the edge enhancement is omitted the camouflage still provided better crypsis than control patterns without edge enhancement. This kind of edge enhancement improved camouflage on all background types. Lastly, we show that edge enhancement can create a perception of multiple surfaces. We conclude that edge enhancement increases the effectiveness of disruptive camouflage through mechanisms that may include the improved disruption of the object outline by implying pictorial relief

Scheduling of eccentric lower limb injury prevention exercises during the soccer micro-cycle: Which day of the week?

Scheduling eccentric-based injury prevention programs (IPP) during the common 6-day micro-cycle in soccer is challenged by recovery and tapering phases. This study profiled muscle damage, neuromuscular performance, and perceptual responses to a lower limb eccentric-based IPP administered 1 (MD+1) vs 3 days (MD+3) postmatch. A total of 18 semi-professional players were monitored daily during 3 in-season 6-day micro-cycles, including weekly competitive fixtures. Capillary creatine kinase concentration (CK), posterior lower limb isometric peak force (PF), counter-movement jump (CMJ) performance, and muscle soreness were assessed 24 hours prior to match-day (baseline), and every 24 hours up to 120 hours postmatch. The IPP consisted of lunges, single stiff leg dead-lifts, single leg-squats, and Nordic hamstring exercises. Performing the IPP on MD+1 attenuated the decline in CK normally observed following match play (CON: 142%; MD+3: 166%; small differences). When IPP was delivered on MD+3, CK was higher vs CON and MD+1 trials on both MD+4 (MD+3: 260%; CON: 146%; MD+1: 151%; moderate differences) and MD+5 (MD+3: 209%; CON: 125%; MD+1: 127%; small differences). Soreness ratings were not exacerbated when the IPP was delivered on MD+1, but when prescribed on MD+3, hamstring soreness ratings remained higher on MD+4 and MD+5 (small differences). No between-trial differences were observed for PF and CMJ. Administering the IPP in the middle of the micro-cycle (MD+3) increased measures of muscle damage and soreness, which remained elevated on the day prior to the next match (MD+5). Accordingly, IPP should be scheduled early in the micro-cycle, to avoid compromising preparation for the following match

A Qualitative Examination of a Mothers' Swim Program: What Keeps Them Coming Back and How Does it Improve Their Psychological Wellbeing?

Introduction Exercise is widely accepted as an effective activity for alleviating the impact of psychosocial challenges associated with motherhood. However our current understanding of how to help mothers adhere to exercise and how it affects positive psychosocial outcomes is lacking. Objective To examine what aspects of a mother-focused swimming exercise program that participating mothers considered most influential in supporting their continuing exercise adherence as well as positively influencing their psychological wellbeing. Methods Qualitative thematic content analysis was performed on individual interview data from mothers, with a child of five years of age or younger, who regularly participated (three or more times a fortnight for six weeks or more) in the organized group based swim programs specifically for mothers (N = 19). Results Mothers' perceptions of the factors supporting their adherence to the swim program were inherently intertwined with factors they considered positively influenced their mental health. Mothers' experiences of the swim program highlighted three higher order themes associated with supporting continued participation and positive psychological outcomes: Environmental factors; social support factors; and health promoting factors. Conclusion Environmental, social support, and health promoting factors are important factors in affecting the efficacy of mothers' exercise programs to enhance participation and wellbeing

Referees’ Decision Making Behavior and the Sport Home Advantage Phenomenon

The aim of this investigation was to examine the decision making behavior of soccer officials (referees) in English Premiership matches to establish whether a bias, as perceived by the media and professional players, does or does not exist. Using notational analysis, this investigation used three trained professional soccer referees to assess the decisions made by match-day officials in favor of home and away teams during the entirety of ten-matched Premiership soccer fixtures. Results revealed a non-significant trend, x2 = .843, p > .05, where the number of decisions awarded by the referees favored the home team. However, significant differences were observed in the number of contentious and incorrect / missed decisions awarded in favor of the home teams compared to away teams, χ2 = 4.17, p < .05 and χ2 = 3.86, p < .05, respectively. Conclusions from this investigation indicate that soccer referees exhibit bias in favor of home teams and suggest that referee decision making behavior may be one mechanistic explanation of the home advantage phenomenon in soccer

Pattern contrast influences wariness in naïve predators towards aposematic patterns

This work was funded by BBSRC grants awarded to J.M.H. and O.P. (BB/N006569/1), C.R. and J.S (BB/N00602X/1), P.G.L (BB/N005945/1), and I.C.C. (BB/N007239/1).An apparent and common feature of aposematic patterns is that they contain a high level of achromatic (luminance) contrast, for example, many warning signals combine black spots and stripes with a lighter colour such as yellow. However, the potential importance of achromatic contrast, as distinct from colour contrast, in reducing predation has been largely overlooked. Here, using domestic chicks as a model predator, we manipulated the degree of achromatic contrast in warning patterns to test if high luminance contrast in aposematic signals is important for deterring naïve predators. We found that the chicks were less likely to approach and eat prey with high contrast compared to low contrast patterns. These findings suggest that aposematic prey patterns with a high luminance contrast can benefit from increased survival through eliciting unlearned biases in naïve avian predators. Our work also highlights the importance of considering luminance contrast in future work investigating why aposematic patterns take the particular forms that they do.Publisher PDFPeer reviewe