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Beneficial Physiological and Metabolic Effects with Acute Intake of New Zealand Blackcurrant Extract during 4 h of Indoor Cycling in a Male Ironman Athlete: A Case Study
Get PDFNew Zealand blackcurrant (NZBC) is known to alter exercise-induced physiological and metabolic responses with chronic (i.e., 7 days) dosing. We examined the effects of acute intake of New Zealand blackcurrant (NZBC) extract on 4 h indoor cycling-induced physiological and metabolic responses in a male amateur Ironman athlete (age: 49 years; BMI: 24.3 kg·m−2; V˙O2max: 58.6 mL·kg−1·min−1; maximal aerobic power: 400 W; history: 14 Ironman events in 16 years) three weeks before competition. Indirect calorimetry was used and heart rate was recorded at 30 min intervals during 4 h indoor (~22.4 °C, relative humidity: ~55%) constant power (165 W) cycling on a Trek Bontrager connected to a Kickr smart trainer. Blood lactate and rating of perceived exertion (RPE) were taken at 60 min intervals. Study was a single-blind placebo-controlled study with capsules (4 × 105 mg anthocyanins) taken 2 h before starting the 4 h of cycling. Water was allowed ad libitum with personalised consumption of gels [a total of eight with three with caffeine (100 mg)], two bananas and 8 × electrolyte capsules (each 250 mg sodium and 125 mg potassium) at personalised time-points. With NZBC extract (CurraNZ), during 4 h of cycling (mean of 8 measurements), minute ventilation was 8% lower than placebo. In addition, there was no difference for oxygen uptake, with carbon dioxide production found to be 4% lower with NZBC extract. With the NZBC extract, the ventilatory equivalents were lower for oxygen and carbon dioxide by 5.5% and 3.7%; heart rate was lower by 10 beats·min−1; lactate was 40% different with lower lactate at 2, 3 and 4 h; RPE was lower at 2, 3 and 4 h; and carbohydrate oxidation was 11% lower. With NZBC extract, there was a trend for fat oxidation to be higher by 13% (p = 0.096), with the respiratory exchange ratio being lower by 0.02 units. Acute intake of New Zealand blackcurrant extract (420 mg anthocyanins) provided beneficial physiological and metabolic responses during 4 h of indoor constant power cycling in a male amateur Ironman athlete 3 weeks before a competition. Future work is required to address whether acute and chronic dosing strategies with New Zealand blackcurrant provide a nutritional ergogenic effect for Ironman athletes to enhance swimming, cycling and running performance
The neural correspondences associated with sleep deprivation in waking cognitive performance of military clearance divers
No full textThe aim of the present study was to investigate the effects of reduced sleep duration on Electroencephalogram (EEG) activity during cognitive performance tasks in Military Clearance Diver trainees, using a novel dry-electrode EEG system
Evaluation of a time-varying cut-off frequency low-pass filter for assessing knee joint moments and ACL injury risk
Get PDFConventional low-pass filtering of 3D motion capture signals prior to estimating knee joint moments and ACL injury risk has known limitations. This study aimed to evaluate the fractional Fourier filter (FrFF), which employs a time-varying cut-off frequency, for assessing peak knee moments during common ACL injury risk screening tasks. Ground reaction force and motion data were collected from 23 team sport athletes performing 45° unanticipated sidesteps and drop jumps. Peak knee abduction, internal rotation and non-sagittal moments were estimated using inverse dynamics after five different low-pass filter approaches were applied (FrFF vs. four variations of a fourth-order Butterworth filter). The FrFF produced peak knee moments larger than "matched" (i.e. force and motion cut-off frequencies were equivalent) and closer to "unmatched" (i.e. force and motion cut-offs were different) Butterworth filter approaches and removed problems with representing foot-to-ground impact peaks. Participants with larger peak moments were identified as "at risk" of injury irrespective of filter approach, but the FrFF identified "at risk" classifications conventional approaches did not. Preliminary evidence suggests that the FrFF displays enhanced sensitivity to movement strategies that induce high knee loads. This was most evident for sidestepping, with more research warranted to optimise the FrFF for drop jumps
Optimal development for the children of prisoners? How children with a parent in prison are supported and why it matters
Get PDFThis article examines the need and types of support for children with a parent in prison, the measures in place to know who they are and the consequences of associated policies for their development. These are discussed within a cultural‐historical child development framework and, within that, questions are raised about optimal development and children's rights. The article is grounded in a mixed‐methods study of a support service for children of prisoners in Worcestershire. Parental imprisonment can impact negatively on societal, institutional and personal aspects of children's development. However, when children are supported through family‐centred, relationship‐focused, strengths‐based services, they can engage more fully in the institutions and social situations of their daily lives
Smart waterborne disease control for a scalable population using biodynamic model in IoT network
Get PDFWe propose a biodynamic model for managing waterborne diseases over an Internet of Things (IoT) network, leveraging the scalability of LoRa IoT technology to accommodate a growing human population. The model, based on fractional order derivatives (FOD), enables smart prediction and control of pathogens that cause waterborne diseases using IoT infrastructure. The human-pathogen-based biodynamic FOD model utilises epidemic parameters (SVIRT: susceptibility, vaccination, infection, recovery, and treatment) transmitted over the IoT network to predict pathogenic contamination in water reservoirs and dumpsites in Iji-Nike, Enugu, the study community in Nigeria. These pathogens contribute to person-to-person, water-to-person, and dumpsite-to-person transmission of disease vectors. Five control measures are proposed: potable water supply, treatment, vaccination, adequate sanitation, and health education campaigns. A stable disease-free equilibrium point is found when the effective reproduction number of the pathogens, R 1. While other studies showed a 98.2% reduction in infections when using IoT alone, this paper demonstrates that combining the SVIRT epidemic control parameters (such as potable water supply and health education campaign) with IoT achieves a 99.89% reduction in infected human populations and a 99.56% reduction in pathogen populations in water reservoirs. Furthermore, integrating treatment with sanitation results in a 99.97% reduction in infected populations. Finally, combining these five control strategies nearly eliminates infection and pathogen populations, demonstrating the effectiveness of multifaceted approaches in public health and environmental management. This study provides a blueprint for governments to plan sustainable smart cities for a growing population, ensuring potable water free from pathogenic contamination, in line with the United Nations Sustainable Development Goals #6 (Clean Water and Sanitation) and #11 (Sustainable Cities and Communities)
The neuromodulatory role of dopamine in improved reaction time by acute cardiovascular exercise
Get PDFAcute cardiovascular physical exercise improves cognitive performance, as evidenced by a reduction in reaction time (RT). However, the mechanistic understanding of how this occurs is elusive and has not been rigorously investigated in humans. Here, using positron emission tomography (PET) with [ C]raclopride, in a multi-experiment study we investigated whether acute exercise releases endogenous dopamine (DA) in the brain. We hypothesized that acute exercise augments the brain DA system, and that RT improvement is correlated with this endogenous DA release. The PET study (Experiment 1: n = 16) demonstrated that acute physical exercise released endogenous DA, and that endogenous DA release was correlated with improvements in RT of the Go/No-Go task. Thereafter, using two electrical muscle stimulation (EMS) studies (Experiments 2 and 3: n = 18 and 22 respectively), we investigated what triggers RT improvement. The EMS studies indicated that EMS with moderate arm cranking improved RT, but RT was not improved following EMS alone or EMS combined with no load arm cranking. The novel mechanistic findings from these experiments are: (1) endogenous DA appears to be an important neuromodulator for RT improvement and (2) RT is only altered when exercise is associated with central signals from higher brain centres. Our findings explain how humans rapidly alter their behaviour using neuromodulatory systems and have significant implications for promotion of cognitive health. KEY POINTS: Acute cardiovascular exercise improves cognitive performance, as evidenced by a reduction in reaction time (RT). However, the mechanistic understanding of how this occurs is elusive and has not been rigorously investigated in humans. Using the neurochemical specificity of [ C]raclopride positron emission tomography, we demonstrated that acute supine cycling released endogenous dopamine (DA), and that this release was correlated with improved RT. Additional electrical muscle stimulation studies demonstrated that peripherally driven muscle contractions (i.e. exercise) were insufficient to improve RT. The current study suggests that endogenous DA is an important neuromodulator for RT improvement, and that RT is only altered when exercise is associated with central signals from higher brain centres
Relationships, stability, and authenticity: How being yourself is ‘the’ key to community sport coaching and youth work
Get PDFThe fields of youth work and community sport development both use participation in sport as a means by which to engage young people and support behavioural change. This is achieved through social intervention programmes (whether part of broader or specific approaches, or individual, group, or community contexts), that specifically address community and psychological wellbeing. While extensive bodies of literature support effective practices in both fields, there are fewer related to the intersubjectivity between them. Given, in the UK context at least, the crossover of funded programmes, objectives, and practice in an applied and policy sense, this study sought to investigate what practitioners in both fields considered best practice relative to how they facilitated appreciable changes in pro‐social behaviour and lifestyle trajectories. This study used semi‐structured interviews with nine participants who all had experience of working in both community sport coaching and youth work. The findings suggest that youth workers and community sport coaches can fashion effective practice through working climates that actively ensure stability and connections, and that authentic projection of self, one that means practitioners must care and have the interest of the young people at heart, are essential to create positive psychological change through meaningful relationships. Please refer to the Supplementary Material section to find this article's Community and Social Impact Statement
Association between hip/groin pain and hip ROM and strength in elite female soccer players
Get PDFBackground/Objectives: Hip strength and range of motion have been compared in soccer players with and without hip and groin pain but only in male footballers or gender-combined samples. In female soccer players, the biomechanics contributing to this injury remain poorly understood compared to other sporting injuries. The aim of the present study is to investigate whether differences exist in adductor and abductor isometric test values and hip joint range of motion between elite female soccer players with longstanding groin pain and injury-free controls. Methods: Ten female elite soccer players with current longstanding hip and groin pain and twenty-five injury-free controls from the same teams were included in the study. Hip adductor and abductor isometric strength were evaluated with a hand-held dynamometer. A bent knee fall-out test was also utilized to examine the hip joint range of motion. Results: A significant difference in abductor isometric test values was observed between the control group (2.29 ± 0.53 N/Kg) and the hip and groin pain group (2.77 ± 0.48 N/Kg; p = 0.018). Furthermore, the injured group showed a decreased adductor/abductor ratio compared to the control group (1.00 ± 0.33 vs. 1.27 ± 0.26; p = 0.013). No differences were observed in the bent knee fall-out test (p = 0.285). Conclusions: Female elite soccer players with current longstanding hip and groin pain exhibited higher abductor isometric strength and lower adductor/abductor ratio compared to non-injured women players. There were no differences in the BKFO test between groups
Tripartite relationships between students, employers and the university: A conversation about degree apprenticeships
No full textHere we explore, through conversation, our experience, as programme coordinators, of delivering degree-level apprenticeships. Although relatively ‘young’, the Degree Apprenticeship model has grown significantly since its inception in 2015 and such programmes continue to be supported politically in a way which suggests a long-term future. However, our experience has been one where two different domains of practice have collided—that of ‘Higher Education’ and that of ‘Apprenticeship’—in a way which, for us, has not been comfortable.
Our conversation explores the issues of working within a triangular relationship between apprentice, employer and the university, in the context of the Apprenticeship framework in England. In addition, the idea of apprenticeship and work-based learning is considered from our direct experience as we reflect on how our current teaching practice has been informed by our early careers. Grounded by the notion of an apprenticeship ideal that is supposed to exist, we consider the apparent tensions that are inherent in offering apprenticeships within a university context
Doctoral students' well‐being through the lens of social practice theory: An auto‐photography study
Get PDFThe aim of this study is to explore doctoral students' (DS) perceptions of social practices that contribute to their well‐being. Utilising social practice theory, specifically the framework of social practices as an interplay of ‘materials’, ‘meanings’ and ‘competences’, we examine which social practices enhance DS well‐being and the contexts in which these practices occur. We employ an auto‐photography methodology. Twelve UK‐based DS took photographs of places that relate to their well‐being and participated in interviews to explain their photos. On completing a three‐stage data analytic procedure, our findings show that DS well‐being is shaped by social practices shared between students and supervisors, where informal settings and the significance of place play a crucial role. We demonstrate that such settings, both on and off campus, act as facilitators for the performance of well‐being‐enhancing practices. Instead of solely attributing DS well‐being to micro‐level individual choices or macro‐level institutional factors, as is often conceptualised, we propose that scholars must focus on the dynamic interplay of social practices that shape DS well‐being. By demonstrating how social practices connect micro‐level experiences with macro‐level structures, we provide a deeper understanding of what shapes well‐being and highlight the essential role of place. Understanding these practices can inform targeted interventions and policies, ultimately enhancing well‐being among doctoral students