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"Tod, David"
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The effect of physical exercise and cognition-orientated interventions on post-stroke cognitive function: Protocol for an overview of reviews
2025
Strokes are becoming more common, and with improving survival rates, the prevalence of stroke survivors has increased. Almost half of chronic stroke survivors are cognitively impaired, and healthcare services are struggling to manage these patients, leaving some feeling \"abandoned\". Several systematic reviews have investigated the effect of physical exercise and cognition-orientated interventions on post-stroke cognitive impairment, and have produced conflicting findings, making it difficult for clinicians and guideline producers to make evidence-based decisions. This overview of reviews aims to provide a comprehensive overview of systematic reviews investigating the effect of physical exercise and cognition-orientated interventions on post-stroke cognitive function, assess methodological quality and certainty of evidence, and identify sources of discordance between these reviews.
Eight databases-Embase, Medline, CINAHL, Psycinfo, SPORTDiscus, The Cochrane Database of Systematic reviews, Epistemonikos, and Scopus-plus grey literature sources will be searched. The eligibility criteria include systematic reviews of trials that included an adult stroke population and investigated physical exercise and/or cognition-orientated interventions. Only reviews that assessed at least one of the DSM-5 neurocognitive domains will be included. Screening, data extraction, and quality appraisal will be conducted by two independent reviewers. Methodological quality, certainty of evidence, and primary study overlap will be assessed using the AMSTAR-2, GRADE, and GROOVE tools, respectively. Interventions will be grouped into exercise, cognition-orientated, and combined interventions, and findings will be synthesised narratively. Heterogeneity assessment will be conducted to identify factors causing discordance between reviews.
The findings of this overview will allow decision makers to make evidence-based decisions, stratified by methodological quality and certainty of evidence. Heterogeneity assessment may identify factors causing discordance between systematic reviews, which could inform the design of future studies.
Registration: PROSPERO CRD42024534179.
Journal Article
Conducting systematic reviews in sport, exercise, and physical activity
by
Tod, David, author
in
Sports Research Methodology.
,
Exercise Research Methodology.
,
Sports Data processing.
2019
This title offers a conceptual and practical guide to the systematic review process and its application to sport, exercise, and physical activity research. It begins by describing what systematic reviews are and why they assist scientists and practitioners. Providing step-by-step instructions the author leads readers through the process, including generation of suitable review questions; development and implementation of search strategies; data extraction and analysis; theoretical interpretation; and result dissemination.
Muscle dysmorphia: current insights
by
Edwards, Christian
,
Tod, David
,
Cranswick, Ieuan
in
Anorexia
,
Body dysmorphic disorder
,
Body image
2016
Since 1997, there has been increasing research focusing on muscle dysmorphia, a condition underpinned by people's beliefs that they have insufficient muscularity, in both the Western and non-Western medical and scientific communities. Much of this empirical interest has surveyed nonclinical samples, and there is limited understanding of people with the condition beyond knowledge about their characteristics. Much of the existing knowledge about people with the condition is unsurprising and inherent in the definition of the disorder, such as dissatisfaction with muscularity and adherence to muscle-building activities. Only recently have investigators started to explore questions beyond these limited tautological findings that may give rise to substantial knowledge advances, such as the examination of masculine and feminine norms. There is limited understanding of additional topics such as etiology, prevalence, nosology, prognosis, and treatment. Further, the evidence is largely based on a small number of unstandardized case reports and descriptive studies (involving small samples), which are largely confined to Western (North American, British, and Australian) males. Although much research has been undertaken since the term \"muscle dysmorphia\" entered the psychiatric lexicon in 1997, there remains tremendous scope for knowledge advancement. A primary task in the short term is for investigators to examine the extent to which the condition exists among well-defined populations to help determine the justification for research funding relative to other public health issues. A greater variety of research questions and designs may contribute to a broader and more robust knowledge base than currently exists. Future work will help clinicians assist a group of people whose quality of life and health are placed at risk by their muscular preoccupation.
Journal Article
The psychology of strength and conditioning
\"An effective strength and conditioning program underpins the training regime of every successful athlete or sportsperson and it is now widely recognised that psychology plays a significant role in the application of strength and conditioning principles. This is the first book to examine the importance of psychological factors in strength and conditioning and to offer a comprehensive overview of current research, theory and best practice. Written by a team of leading international researchers and practitioners, the book looks at how psychology influences training and performance and how training can influence an individual's psychological well-being. It explores a range of key topics in contemporary sport psychology and athletic training, including: mental skills training behaviour change psychology in professional practice psychological problems, including exercise dependence, eating disorders and steroid use Throughout, the book combines evidence-based research with discussion of the practical issues facing athletes, coaches and sport science professionals. By firstly developing our understanding of the latest psychological skills and techniques used by athletes and coaches to maximise strength and conditioning training and performance, and then the ways other psychological factors influence, and are influenced by, strength and conditioning training, this book represents invaluable reading for all advanced students, researchers, trainers and sport scientists with an interest in strength and conditioning or sport psychology\"-- Provided by publisher.
Psychosocial predictors and psychological prevention of soccer injuries: A systematic review and meta-analysis of the literature
by
Bragazzi, Nicola Luigi
,
Paravlic, Armin
,
Slimani, Maamer
in
Anxiety
,
Athletes
,
Athletic Injuries - prevention & control
2018
To examine (a) the relationships between the psychosocial risk factors and injury rates and (b) the effects of psychological-based prevention interventions on the injury risk of soccer players.
Scholarly electronic databases (PubMed/MEDLINE, Google Scholar, Scopus) were searched on 1 January 2017, complemented by manual searches of bibliographies. Setting: Systematic review and meta-analysis.
We identified 13 eligible studies, including a total of 1149 injured soccer players aged between 14 and 36 years.
Psychosocial risk factors, psychological-based prevention interventions and injury risk in soccer players.
Personality traits, such as trait anxiety and perceived mastery climate, along with a history of stressors, like negative-life-event stress or high level of life stress, daily hassle, and previous injury, are the main predictors of injury rates among soccer players. Also, from injury prevention studies, it has been shown that psychological-based interventions reduce injury rates (effect size = 0.96; 95% CI 0.34–1.58; p = 0.002) in senior soccer players.
Practitioners need to ensure injured soccer players are psychologically and socially ready to play. They should also employ psychological-based interventions (i.e., mindfulness, imagery, self-talk, stress management, relaxation, goal setting) when designing injury prevention programs.
•History of stressors and personality attributes are the main predictors of injury rates among soccer players.•Psychological-based prevention interventions might have potential to reduce the frequency of soccer injuries.•This review suggests that the player who can effectively manage life stress and anxiety will be less likely to be injured.•Since the effectiveness of psychological interventions was evident only in 1/3 of studies, further research is needed.
Journal Article
Redox Homeostasis and Inflammation Responses to Training in Adolescent Athletes: a Systematic Review and Meta-analysis
by
Varamenti, Evdokia
,
Tod, David
,
Pullinger, Samuel A.
in
Medicine
,
Medicine & Public Health
,
Sports Medicine
2020
Background
Several studies have highlighted the substantial role of the athlete’s redox and inflammation status during the training process. However, many factors such as differences in testing protocols, assays, sample sizes, and fitness levels of the population are affecting findings and the understanding regarding how exercise affects related biomarkers in adolescent athletes.
Objectives
To search redox homeostasis variables’ and inflammatory mediators’ responses in juvenile athletes following short- or long-term training periods and examine the effect size of those variations to training paradigms.
Methods
A PRISMA-compliant systematic review and meta-analysis were conducted. The entire content of PubMed (MEDLINE), Scopus, and Science Direct were systematically searched until December 2019. Studies with outcomes including (1) a group of adolescent athletes from any individual or team sport, (2) the assessment of redox and/or inflammatory markers after a short- (training session or performance testing) or longer training period, and (3) variables measured in blood were retained. The literature search initially identified 346 potentially relevant records, of which 36 studies met the inclusion criteria for the qualitative synthesis. From those articles, 27 were included in the quantitative analysis (meta-analysis) as their results could be converted into common units.
Results
Following a short training session or performance test, an extremely large increase in protein carbonyls (PC) (ES 4.164; 95% CI 1.716 to 6.613;
Z
= 3.333,
p
= 0.001), a large increase in thiobarbituric acid reactive substances (TBARS) (ES 1.317; 95% CI 0.522 to 2.112;
Z
= 3.247,
p
= 0.001), a large decrease in glutathione (GSH) (ES − 1.701; 95% CI − 2.698 to − 0.705;
Z
= − 3.347,
p
= 0.001), and a moderate increase of total antioxidant capacity (TAC) level (ES 1.057; 95% CI − 0.044 to 2.158;
Z
= 1.882,
p
= 0.060) were observed. Following more extended training periods, GSH showed moderate increases (ES 1.131; 95% CI 0.350 to 1.913;
Z
= 2.839,
p
= 0.005) while TBARS displayed a small decrease (ES 0.568; 95% CI − 0.062 to 1.197;
Z
= 1.768,
p
= 0.077). Regarding cytokines, a very large and large increase were observed in IL-6 (ES 2.291; 95% CI 1.082 to 3.501;
Z
= 3.713,
p
= 0.000) and IL-1 receptor antagonist (ra) (ES 1.599; 95% CI 0.347 to 2.851;
Z
= 2.503,
p
= 0.012), respectively, following short-duration training modalities in juvenile athletes.
Conclusions
The results showed significant alterations in oxidative stress and cytokine levels after acute exercise, ranging from moderate to extremely large. In contrast, the variations after chronic exercise ranged from trivial to moderate. However, the observed publication bias and high heterogeneity in specific meta-analysis advocate the need for further exploration and consistency when we deal with the assessed variables to ascertain the implications of structured training regimes on measured variables in order to develop guidelines for training, nutritional advice, and wellbeing in young athletes.
Trial Registration
PROSPERO
CRD42020152105
Journal Article
The Plum in the Golden Vase or, Chin P'ing Mei: Volume Five: The Dissolution
2013
This is the fifth and final volume in David Roy's celebrated translation of one of the most famous and important novels in Chinese literature.The Plum in the Golden Vaseor,Chin P'ing Meiis an anonymous sixteenth-century work that focuses on the domestic life of Hsi-men Ch'ing, a corrupt, upwardly mobile merchant in a provincial town, who maintains a harem of six wives and concubines. The novel, known primarily for its erotic realism, is also a landmark in the development of the narrative art form-not only from a specifically Chinese perspective but in a world-historical context.
This complete and annotated translation aims to faithfully represent and elucidate all the rhetorical features of the original in its most authentic form and thereby enable the Western reader to appreciate this Chinese masterpiece at its true worth.
Acute Effects of Moderate versus High-Intensity Strength Exercise on Attention and Mood States in Female Physical Education Students
2021
The presumed benefits of exercise/physical activity on the brain are an important public health issue. However, the experimental approach to understanding the effects of physical activity on the brain, and more particularly on cognitive functions, has only been studied recently. In particular, females remain underrepresented in the research, despite having a specific training/exercise adaptation/response. The aim of the present study was to examine the acute effects of high- and moderate-intensity strength exercise (3 sets of 8–10 repetitions and 3 sets of 6 repetitions, respectively, with each session lasting approximately 30 min) on attention and mood states in female physical education students. Forty-six female physical education students (Mage = 20.02 ± 1.05 years, MBody Mass Index = 21.07) volunteered to participate in this study. They were divided into three groups: a moderate-intensity strength exercise group (MISEG: n = 15), a high-intensity strength exercise group (HISEG: n = 16), and a control group (CG: n = 15). Attention and psychological states were assessed using the d2 test, Rating of Perceived Exertion (RPE) and the Brunel Mood Scale (BRUMS) questionnaire, respectively, before and after each session. The data showed that in the MISEG attention increased, in terms of concentration (p = 0.05). RPE values, fatigue and confusion were higher for the HISEG than the CG (p < 0.05) and the MISEG (p < 0.05). Vigour was higher for the MISEG than other groups (p < 0.05). In conclusion, moderate-intensity resistance exercise is an appropriate method to improve attention in female participants. The elevated cognitive performance may be due to the changes in RPE and mood states (fatigue, vigour and confusion subscales).
Journal Article