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Stage Call: Cardiovascular Reactivity to Audition Stress in Musicians
Get PDFAuditioning is at the very center of educational and professional life in music and is associated with significant psychophysical demands. Knowledge of how these demands affect cardiovascular responses to psychosocial pressure is essential for developing strategies to both manage stress and understand optimal performance states. To this end, we recorded the electrocardiograms (ECGs) of 16 musicians (11 violinists and 5 flutists) before and during performances in both low- and high-stress conditions: with no audience and in front of an audition panel, respectively. The analysis consisted of the detection of R-peaks in the ECGs to extract heart rate variability (HRV) from the notoriously noisy real-world ECGs. Our data analysis approach spanned both standard (temporal and spectral) and advanced (structural complexity) techniques. The complexity science approaches—namely, multiscale sample entropy and multiscale fuzzy entropy—indicated a statistically significant decrease in structural complexity in HRV from the low- to the high-stress condition and an increase in structural complexity from the pre-performance to performance period, thus confirming the complexity loss theory and a loss in degrees of freedom due to stress. Results from the spectral analyses also suggest that the stress responses in the female participants were more parasympathetically driven than those of the male participants. In conclusion, our findings suggest that interventions to manage stress are best targeted at the sensitive pre-performance period, before an audition begins
Financial Doping in the English Premier League
Get PDFWhilst the relationship between money and success in elite sport is acknowledged, the exact nature, extent and implications of this relationship is one that has not been carefully examined. In this paper we have three main aims. Firstly, to provide empirical evidence of the extent that money buys success in the English Premier League. Secondly, to evaluate this evidence from a sports ethics perspective, and, finally, to discuss potential solutions to the problem. We argue that the evident performance advantage teams gain through financial investments is contrary to the spirit of sport as it undermines athletic excellence and the ‘sweet tension of uncertainty of outcome’ that is central to good competition. Consequently, financial investments in elite football ought to be regulated and controlled. We argue, however, that current attempts to do so (via Financial Fair Play Regulations) are inadequate as they focus on issues concerning financial health, rather than the health of the game in terms of spirit and fairness
Tourism and autism: Journeys of mixed emotions
Get PDFThere is an evolving tourism literature around psychological wellbeing, social exclusion and disability. This paper advances tourism knowledge into the terrain of psychological health and developmental complexities, and psychological distress. It draws on a phe-nomenological position to understand the lived experiences of mothers of children with developmental difficulties, in this case diagnosed with autism spectrum disorder (ASD). It discusses the emotional and everyday challenges of caring for a child diagnosed with ASD on holiday, discusses the perceived benefits holidays offer and outlines care-giving strategies adopted by mothers to manage their children’s tourism experiences. The paper discusses the uniqueness of the context of autism and problematizes popular discourses, which predominantly frame tourism as pleasurable settings of escape, stimulation, novelty and relaxation
Sport psychology consulting in professional rugby union in the United Kingdom
Get PDFThis article describes my experiences of working within professional rugby union in South Wales, United Kingdom. Initially, I locate the context of professional rugby union in the country alongside how my various subcultural understandings of the sport were obtained. After outlining my consulting philosophy developed for working in a professional rugby union context, subsequent cultural challenges for practitioners working in the sport are then explored, together with example strategies used to account for such cultural considerations. I conclude by reflecting upon the importance of practitioners possessing and developing contextual intelligence and cultural competency to work effectively in high performance environments
What's wrong with the scrum laws in rugby union? - Judgment, truth and refereeing
Get PDFOfficiating and the role of officials in sport are crucial and often decisive factors in sports contests. Notable contributions in philosophy of sport include Collins (2012), Russell (1997; 1999), McFee (2011) & Mumford (2006) have brought a sharp philosophical focus to highlight that justice and desert of sport contests, in part, rely on officiating truths (performances) that arise from an appropriate admixture of epistemic (judgments) and metaphysical (actions) ingredients. This paper provides a rigorous and original philosophical analysis of the problems of obeying the rules and of applying the rules of sport. The paper focuses on a particular phase of play in rugby union, namely the scrum. It is fair to say that the scrum has become a focus of criticism and bewilderment. Elite televised rugby is damaged as a spectacle because too much time is wasted setting and re-setting scrums. Furthermore, our trust in the fairness of games is eroded because the scrum is a ‘lottery’ when it comes to officiating. In this paper, we identify two fundamental structural problems which contribute to the scrum controversy. First, drawing on Mumford (2006) and Collins (2012) we argue that officials cannot make reliable judgments about scrums because they cannot see what they need to see. Secondly, we argue that players cannot follow the laws of the scrum even if they have a strong desire to do so. Laws which can’t be followed are, according to Fuller (2000) defective. Consequently, the scrum is not only potentially dangerous but also flawed in terms of its capacity to actualize an intended part of the game
Tourism’s lost leaders: Analysing gender and performance
Get PDFHigher education is increasingly engaged with diversity initiatives, especially those focused on women in academic leadership, whilst there is an evolving literature across the humanities and the social, management and natural sciences, critiquing academia’s gendered hierarchies. In contrast, senior academics in the field of tourism management have largely eluded similar sustained analysis. This paper builds on recent gender-aware studies of tourism’s leading academics with three aims. Firstly, to widen evidence of gendering in tourism’s academic leadership by scrutinizing and contextualizing performance indicators, which make and mark its leaders and shape its knowledge canon. Secondly, since critique alone cannot lead to transformation, the paper seeks to ‘undo’ gender in tourism’s academy. Thirdly the paper presents interventions to accelerate academic gender equity
Age-related differences in left ventricular structure and function between healthy men and women
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Abstract
Objectives: Cardiovascular function generally decreases with age, but whether this decrease differs between men and women is unclear. Our aims were twofold: (1) to investigate age-related sex differences in left ventricular (LV) structure, function and mechanics, and (2) to compare these measures between pre- and postmenopausal women in the middle-aged group.
Methods: Resting echocardiography was performed in a cross-sectional sample of 82 healthy adults (14 young men, 19 middle-aged men, 15 young women, 34 middle-aged women: 15 premenopausal and 19 postmenopausal). Two-way ANOVAs were used to examine sex × age interactions, and t-tests to compare pre- and postmenopausal women (α < 0.1).
Results: Normalized LV mass, stroke volume and end-diastolic volume were significantly lower in middle-aged than young men, but this difference was smaller between middle-aged and young women. Peak systolic apical mechanics were significantly greater in middle-aged men than in middle-aged women, but not between young men and women. Postmenopausal women had significantly lower LV relaxation and mechanics (torsion, twisting velocity and apical circumferential strain rates) compared with middle-aged premenopausal women.
Conclusion: Our cross-sectional findings suggest that the hearts of men and women may age differently, with men displaying greater differences in LV volumes accompanied by differences in apical mechanics
Communicating martial arts knowledge: Conferring over a wealth of possibilities
Get PDFThe 3rd Annual Martial Arts Studies Conference held at Cardiff University (11‐13 July, 2017) was an eclectic collection of keynotes, papers, workshops, networking and social events. It connected PhD students, established professors and practitioner‐instructors in university lecture rooms, public parks, and music halls across three days of academic, social and physical activities. From historical studies of Chinese martial arts to the performance of Indian styles, it brought together scholars, practitioner‐researchers and martial artists for a supportive, but also scholarly, gathering – one which was both thematically open but at the same united by an exploration of the communication of embodied research and knowledge. In sum, the conference demonstrated that martial arts studies, as a still young field, shows a wealth of promise, with emerging leaders, topics and debates that will stimulate future research, cross‐continental collaboration and intercultural dialogue.
Keywords: Martial arts; martial arts studies; interdisciplinarity; embodied knowledge; global scholarship; research community
An audit of injuries in six English professional soccer academies
Get PDFRegulations now state that professional academies in the United Kingdom are required to substantially increase the volume of soccer training. This study assessed the current injury occurrence, providing an update to reports published prior to the introduction of the Elite Player Performance Plan (EPPP). 608 soccer players aged 11–18 years from six professional soccer clubs were prospectively monitored, recording injuries during the 2014–2015 season. An injury rate of 1.32 injuries per player/season was indicated with a mean time loss of 21.9 days per injury. The greatest time loss per injury was in the U14s-U15s, and the highest rate of severe injuries in the U15s. Strains and sprains were the most common injury type, with the knee and ankle the most frequently injured anatomical sites. Seasonal variation indicated two peaks in injury incidence, occurring in September and January. In comparison to a published audit prior to the inception of the EPPP, this study indicates that academy soccer players are three-times more likely to experience an injury. Given that time loss and injury severity also increased during periods that typically follow rapid growth, these players should be considered an important group for training load monitoring and injury prevention strategies
A novel antibacterial peptide derived from Crocodylus siamensis hemoglobin hydrolysate induces membrane permeabilisation causing iron dysregulation, oxidative stress and bacterial death
Get PDFAbstract
AIMS:
A novel antibacterial peptide from Crocodylus siamensis hemoglobin hydrolysate (CHHs) was characterised for antimicrobial activity.
METHODS AND RESULTS:
CHHs was hydrolysed for 2 h (2h-CHH), 4 h (4h-CHH), 6 h (6h-CHH) and 8 h (8h-CHH). 8h-CHH showed antibacterial activity against Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae and Pseudomonas aeruginosa at concentrations of 20, 20, 20 and 10 mg ml-1 (w/v), respectively. Fluorescent microscopy revealed that 8h-CHH had bactericidal activity against E. coli and P. aeruginosa. β-galactosidase assay supported by RT-qPCR demonstrated that 8h-CHH resulted in differential expression of genes involved in iron homeostasis (ftnA and bfd) and oxidative stress (sodA, soxR and oxyR). Siderophore assay indicated that 8h-CHH also impaired siderophore production with diminished expression of pvdF. This pattern of gene expression suggests that 8h-CHH triggers the release of free ferric ions in the cytoplasm. However, decreased expression of genes associated with the SOS response (recA and lexA) in combination with neutral comet revealed that no DNA damage was caused by 8h-CHH. Membrane permeabilisation assay indicated that 8h-CHH caused membrane leakage thought to mediate the antibacterial and iron-stress responses observed, due to loss of regulated iron transport. The novel active peptide from 8h-CHH was determined as QAIIHNEKVQAHGKKVL (QL17), with 41% hydrophobicity and +2 net charge.
CONCLUSIONS:
The QAIIHNEKVQAHGKKVL fragment of Crocodylus siamensis hemoglobin is antibacterial via a mechanism that likely relies on iron dysregulation and oxidative stress which results in bacterial death.
SIGNIFICANCE AND IMPACT OF THE STUDY:
We have described for the first time, a novel peptide derived from Crocodylus siamensis hemoglobin hydrolysate, that has the potential to be developed as a novel antimicrobial peptide. This article is protected by copyright. All rights reserved