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Virtual reality based executive function training in schools: The experience of primary school-aged children, teachers and training teaching assistants
Get PDFExecutive function (EF) is a set of higher order cognitive processes through which learning and everyday goals are realised. They comprise the fundamental building blocks of how we plan, execute, monitor and regulate tasks, and impact our cognitive, socioemotional and behavioural responses. An important question to consider is how we can support children to develop effective EF skills through motivating and age-appropriate training. Virtual reality (VR) offers an interesting avenue to enhance motivation due to the experience of presence and immersion, however, whether children experience presence and immersion similarly to adults is unknown and could impact the educational utility of VR over other media. In order to understand whether VR is suitable for an educational setting we must understand the experience of key stakeholders, such as school-aged children and adults that will be facilitating use in the educational context. Therefore, the current study aims to understand the experience of key stakeholders using EF training delivered in a VR environment, to enable reflection on the
feasibility and usability of the technology. This study aimed to explore the qualitative experiences of 8 primary school-aged children, 5 teachers and 13 training teaching assistants, after playing an EF training game, Koji’s Quest, on a VR head mounted display. Firstly we found that most teachers and trainee teachers gave good ratings of usability, but in their subjective descriptions of use focused on hedonic experiences, whereas, children focused on pragmatic experiences. Results also indicate that adults may favour ‘being’ definitions of presence, whereas child participants appear to incorporate both ‘being’ and ‘doing’ definitions into their accounts. This research has implications for how VR based EF training can be maximised within an educational setting
Beyond change scores: Employing an improved statistical approach to analyze the impact of entry fitness on physical performance during British Army basic training in men and women
Get PDFAbstractThe aim was to use a robust statistical approach to examine whether physical fitness at entry influences performance changes between men and women undertaking British Army basic training (BT). Performance of 2 km run, seated medicine ball throw (MBT) and isometric mid‐thigh pull (MTP) were assessed at entry and completion of Standard Entry (SE), Junior Entry‐Short (JE‐Short), and Junior Entry‐Long (JE‐Long) training for 2350 (272 women) recruits. Performance change was analyzed with entry performance as a covariate (ANCOVA), with an additional interaction term allowing different slopes for courses and genders (p < 0.05). Overall, BT courses saw average improvements in 2 km run performance (SE: −6.8% [−0.62 min], JE‐Short: −4.6% [−0.43 min], JE‐Long: −7.7% [−0.70 min]; all p < 0.001) and MBT (1.0–8.8% [0.04–0.34 m]; all p < 0.05) and MTP (4.5–26.9% [6.5–28.8 kg]; all p < 0.001). Regression models indicate an expected form of “regression to the mean” whereby test performance change was negatively associated with entry fitness in each course (those with low baseline fitness exhibit larger training improvements; all interaction effects: p < 0.001, > 0.006), particularly for women. However, when matched for entry fitness, men displayed considerable improvements in all tests, relative to women. Training courses were effective in developing recruit physical fitness, whereby the level of improvement is, in large part, dependent on entry fitness. Factors including age, physical maturity, course length, and physical training, could also contribute to the variability in training response between genders and should be considered when analyzing and/or developing physical fitness in these cohorts for future success of military job‐task performance
Evaluation of possible role of fluoride in pathogenesis of Oral Submucous Fibrosis: a pilot study
Get PDFBackground
Oral submucous fibrosis (OSMF) is a potentially malignant disorder. Although areca nut chewing is an established risk factor, its low prevalence among nut chewers indicates additional factors likely facilitates pathogenesis. We recently demonstrated high fluoride levels in smokeless tobacco products and hypothesized a potential pathological role of fluoride in OSMF. Further exploring this novel role, this study compared fluoride levels in tissue, serum, and saliva samples from OSMF patients and healthy controls.
Methods
The ethically approved study included 25 clinically confirmed OSMF patients and 25 healthy matched controls. OSMF cases underwent buccal mucosal incisional biopsy, while controls had buccal mucosa tissue sampling during third molar removal. Fasting venous blood and unstimulated saliva were collected. Fluoride levels were analysed using ion chromatography and expressed as median (IQR).
Results
OSMF cases showed significantly higher fluoride concentrations compared with controls in tissue biopsies (30.1 vs. 0 mg/kg, p < 0.0001), serum (0.4 vs. 0 mg/L, p = 0.005) and saliva (1.3 vs. 0 mg/L, p < 0.0001). Majority (68%) of controls had undetectable fluoride levels across all samples. Tissue fluoride weakly correlated with OSMF severity (r = −0.158, p = 0.334).
Conclusion
The preliminary findings demonstrated increased tissue fluoride levels in OSMF patients compared with healthy controls. Along with a previous study showing high fluoride content in smokeless tobacco products, these findings provided early evidence suggesting fluoride could play a contributory role in OSMF pathogenesis. Further large-scale investigation is warranted to definitively establish whether the association between fluoride exposure and OSMF is indicative of causation
Examining the importance of local and global patterns for familiarity detection in soccer action sequences
Get PDFPattern recognition is a defining characteristic of expertise across multiple domains. Given the dynamic interactions at local and global levels, team sports can provide a vehicle for investigating skilled pattern recognition. The aims of this study were to investigate whether global patterns could be recognised on the basis of localised relational information and if relations between certain display features were more important than others for successful pattern recognition. Elite (n = 20), skilled (n = 34), and less-skilled (n = 37) soccer players completed three recognition paradigms of stimuli presented in point-light-stimuli format across three counterbalanced conditions: ‘whole-part’; ‘part-whole’; and ‘whole-whole’. ‘Whole’ clips represented a 11v11 soccer match and ‘part’ clips presented the same passages of play with only two centre forwards or two peripheral players. Elite players recognised significantly more accurately than the skilled and less-skilled groups. Participants were significantly more accurate in the ‘whole-whole’ condition compared to others, and recognised stimuli featuring the two central attacking players significantly more accurately than those featuring peripheral players. Findings provide evidence that elite players can encode localised relations and then extrapolate this information to recognise more global macro patterns
Methodological considerations in assessing countermovement jumps with handheld accentuated eccentric loading
Get PDFThis study aimed to compare the agreement between three-dimensional motion capture and vertical ground reaction force (vGRF) in identifying the point of dumbbell (DB) release during a countermovement jump with accentuated eccentric loading (CMJAEL), and to examine the influence of the vGRF analysis method on the reliability and magnitude of CMJAEL variables. Twenty participants (10 male, 10 female) completed five maximal effort CMJAEL at 20% and 30% of body mass (CMJAEL20 and CMJAEL30, respectively) using DBs. There was large variability between methods in both loading conditions, as indicated by the wide limits of agreement (CMJAEL20 = −0.22 to 0.07 s; CMJAEL30 = −0.29 to 0.14 s). Variables were calculated from the vGRF data, and compared between four methods (forward integration (FI), backward integration (BI), FI adjusted at bottom position (BP), FI adjusted at DB release point (DR)). Greater absolute reliability was observed for variables from DR (CV% ≤ 7.28) compared to BP (CV% ≤ 13.74), although relative reliability was superior following the BP method (ICC ≥ 0.781 vs ≥ 0.606, respectively). The vGRF method shows promise in pinpointing the DB release point when only force platforms are accessible, and a combination of FI and BI analyses is advised to understand CMJAEL dynamics
Unveiling the effects of interval resistance training and chlorella vulgaris supplementation on meteorin-like protein and oxidative stress in obese men
Get PDFBackground and Aim
Dysregulation of adipocyte function occurs in obesity. Meteorin-like protein (metrnl) is a newly discovered modulator of inflammation, metabolism, and differentiation of human adipocytes. The dietary supplement Chlorella Vulgaris (CV) reduces hyperlipidemia, hyperglycemia, and oxidative stress in clinical trials. We explored the impact of 12 weeks of interval resistance training (IRT) and supplementation with CV on plasma levels of metrnl and oxidative stress in males with obesity.
Methods
Forty-four obese men (BMI: 32.0 ± 1.5 kg/m2, weight: 101.1 ± 2.2 kg, age: 23-35 years) were randomized into four groups (n = 11/group): Control (CON), CV supplement (CV), IRT, and CV + IRT (CVIRT). The IRT was performed for 12 weeks (three sessions per week). The treatment consisted of a daily intake of CV (1800 mg capsule) or placebo capsules. Blood samples were collected 48 hours before and after the interventions to analyze biomedical measurements.
Results
The IRT and CVIRT had elevations in plasma metrnl, superoxide dismutase (SOD), and total antioxidant capacity (TAC) levels (all p0.05).
Conclusion
Although IRT and its combination with CV hold promise for improving metrnl levels and oxidative status in obesity, combining IRT and CV do not yield greater benefits than IRT alone. While standalone CV supplementation could favorably impact certain markers of oxidative stress, the effectiveness of CV supplementation appears to have a relatively limited effect across assessed biomarkers and requires further investigation
Imaging body-mind crosstalk in young adults
Get PDFObjective
There is evidence that complex relationships exist between motor functions, brain structure, and cognitive functions, particularly in the aging population. However, whether such relationships observed in older adults could extend to other age groups (e.g., younger adults) remains to be elucidated. Thus, the current study addressed this gap in the literature by investigating potential associations between motor functions, brain structure, and cognitive functions in a large cohort of young adults
Methods
In the current study, data from 910 participants (22–35 yr) were retrieved from the Human Connectome Project. Interactions between motor functions (i.e., cardiorespiratory fitness, gait speed, hand dexterity, and handgrip strength), brain structure (i.e., cortical thickness, surface area, and subcortical volumes), and cognitive functions were examined using linear mixed-effects models and mediation analyses. The performance of different machine-learning classifiers to discriminate young adults at three different levels (related to each motor function) was compared
Results
Cardiorespiratory fitness and hand dexterity were positively associated with fluid and crystallized intelligence in young adults, whereas gait speed and handgrip strength were correlated with specific measures of fluid intelligence (e.g., inhibitory control, flexibility, sustained attention, and spatial orientation; false discovery rate [FDR] corrected, p < 0.05). The relationships between cardiorespiratory fitness and domains of cognitive function were mediated by surface area and cortical volume in regions involved in the default mode, sensorimotor, and limbic networks (FDR corrected, p < 0.05). Associations between handgrip strength and fluid intelligence were mediated by surface area and volume in regions involved in the salience and limbic networks (FDR corrected, p < 0.05). Four machine-learning classifiers with feature importance ranking were built to discriminate young adults with different levels of cardiorespiratory fitness (random forest), gait speed, hand dexterity (support vector machine with the radial kernel), and handgrip strength (artificial neural network)
Conclusions
In summary, similar to observations in older adults, the current study provides empirical evidence (i) that motor functions in young adults are positively related to specific measures of cognitive functions, and (ii) that such relationships are at least partially mediated by distinct brain structures. Furthermore, our analyses suggest that machine-learning classifier has a promising potential to be used as a classification tool and decision support for identifying populations with below-average motor and cognitive functions
Metabolic, cardiovascular, neuromuscular, and perceptual responses to repeated military-specific load carriage treadmill simulations
Get PDFBouts of military load carriage are rarely completed in isolation; however limited research has investigated the physiological responses to repeated load carriage tasks. Twelve civilian men, (age, 28 ± 8 y; stature, 185.6 ± 5.8 cm; body mass 84.3 ± 11.1 kg; maximal oxygen uptake, 51.5 ± 6.4 mL·kg-1·min-1) attended the laboratory on two occasions to undertake a familiarisation and an experimental session. Following their familiarisation session, participants completed three bouts of a fast load carriage protocol (FLCP; ~65-minutes), carrying 25 kg, interspersed with a 65-minute recovery period. Physiological strain (oxygen uptake [V̇O2], heart rate [HR]) were assessed during the FLCP bouts, and physical performance assessments (weighted counter-movement jump [wCMJ], maximal isometric voluntary contraction of the quadriceps [MIVC], seated medicine ball throw [SMBT]) were measured pre- and post- each FLCP bout. A main effect for bout and measurement time was evident for V̇O2 and HR (both p<0.001, Ѡ2= 0.103-0.816). There was no likely change in SMBT distance (p=0.201, Ѡ2=0.004), but MIVC peak force reduced by approximately 25% across measurement points (p<0.001, Ѡ2=0.133). A mean percentage change of approximately -12% from initial values, was also evident for peak wCMJ height (p=0.001, Ѡ2=0.028). Collectively, these data demonstrate that repeated FLCP bouts result in an elevated physiological strain for each successive bout, along with a substantial reduction in lower body power (wCMJ and MIVC). Future research should therefore investigate possible mitigation strategies, to maintain role-related capability
Women’s football fandom and stadium attendance in Iran: A form of everyday resistance?
Get PDFTo date, there is a scarcity of research examining women’s leisure lives in Iran, particularly their football fandom. In this study, we examine the development and negotiation of women’s fan identities, their experience of stadium attendance and alternative forms of fandom, as well as the extent to which their fandom is a form of everyday resistance. To do so, we draw on semi-structured interview data with ten women who attended matches at Azadi Stadium in Tehran. Utilising identity theory and concepts of everyday resistance, we found women have highly salient fan identities, developed through various forms of fandom. This is despite gender and other factors such as geographical location acting as identity constraints. Due to historic restrictions in women attending stadiums, interviewees used alternative fandom as types of everyday resistance, opposing gender norms in subtle ways. Moreover, stadium attendance in itself symbolises everyday resistance for women, a means to challenge others’ opposition to their fandom, and resist cultural expectations including ideas about ‘appropriate’ gender norms. The significance of this article is demonstrated by the potential for women’s football fandom to contest gender inequality in Iranian society and we suggest it is both a form of activism and a leisure activity
Reexamining the association between preseason challenge and threat states and performance across the season
Get PDFChallenge and threat (C/T) states have been shown to predict sport performance under pressure. Nevertheless, only one study has examined whether preseason C/T states are associated with season-long performance, yielding promising findings. Despite promising findings, this work is not without limitations that warrant addressing. We aimed to address these limitations and contribute to the scarce literature which tests the effect of anticipatory C/T states on longer term performance. Thirty-eight amateur cricketers prepared and delivered two counterbalanced speeches: a control speech and a speech about an important cricket batting situation approximately 16 weeks prior to the start of their competitive season. Regression analysis showed that cardiovascular reactivity in anticipation of delivering a speech about an important cricket batting scenario the next season did not predict season-long batting performance. The findings have potential to challenge the role C/T states play in predicting longer term performance in the sport domain