Showing papers by "Auckland University of Technology published in 2014"

Decolonizing Methodologies: Research and Indigenous Peoples

Abstract: A second edition of Professor Linda Smith's impressively well-received methodology text has now been published. Some 13 years before (in 1999), her first edition developed the concept of indigenous...

Prevalence of Muscular Dystrophies: A Systematic Literature Review

Abstract: Background: Determining the prevalence of neuromuscular disorders for the general population is important to identify the sc

Physical activity is medicine for older adults

Abstract: There is evidence from high quality studies to strongly support the positive association between increased levels of physical activity, exercise participation and improved health in older adults. Worldwide, around 3.2 million deaths per year are being attributed to inactivity. In industrialised countries where people are living longer lives, the levels of chronic health conditions are increasing and the levels of physical activity are declining. Key factors in improving health are exercising at a moderate-to-vigorous level for at least 5 days per week and including both aerobic and strengthening exercises. Few older adults achieve the level of physical activity or exercise that accompanies health improvements. A challenge for health professionals is to increase physical activity and exercise participation in older adults. Some success in this has been reported when physicians have given specific, detailed and localised information to their patients, but more high quality research is needed to continue to address this issue of non-participation in physical activity and exercise of a high enough level to ensure health benefits.

Drought survival of tropical tree seedlings enhanced by non-structural carbohydrate levels

Abstract: Widespread forest die-back due to the increasing frequency and intensity of drought in many parts of the planet is focusing attention on the mechanisms of tree drought resistance. This study provides direct experimental evidence that greater non-structural carbohydrate concentrations before drought help maintain hydraulic function and thereby prolong drought tolerance in seedlings of ten tropical tree species.

Measuring flourishing: The impact of operational definitions on the prevalence of high levels of wellbeing

Abstract: A number of studies find that religious people are happier than non-religious ones. Yet a number of fundamental questions about that relationship remain unanswered. A critical one is the direction of causality: does religion make people happier or are happier people more likely to have faith in something that is beyond their control? We posit that the relationship between religion and wellbeing is mediated by factors ranging from intrinsic purpose, to its social aspects, to its role as an insurance mechanism for people who face great adversity. We explore a number of related questions, using world-wide data from the Gallup World Poll. As these data are cross- section data, we cannot establish causality; we do, however, explore: how or if the relationship between religion and wellbeing varies across the two distinct wellbeing dimensions (hedonic and evaluative); how social externalities mediate the relationship; how the relationship changes as countries and people within them become more prosperous and acquire greater means and agency; and how the relationship between religion and wellbeing varies depending on where respondents are in the wellbeing distribution. We find that the positive relation between religion and evaluative wellbeing is more important for respondents with lower levels of agency, while the positive relation with hedonic wellbeing holds across the board. The social dimension of religion is most important for the least social respondents, while the religiosity component of religion is most important for the happiest respondents, regardless of religious affiliation or service attendance. As such, it seems that the happiest are most likely to seek social purpose in religion, the poorest are most likely to seek social insurance in religion, and the least social are the most likely to seek social time in religion.

Effects of low-volume high-intensity interval training (HIT) on fitness in adults: a meta-analysis of controlled and non-controlled trials

Abstract: Low-volume high-intensity interval training (HIT) appears to be an efficient and practical way to develop physical fitness. Our objective was to estimate meta-analysed mean effects of HIT on aerobic power (maximum oxygen consumption [VO2max] in an incremental test) and sprint fitness (peak and mean power in a 30-s Wingate test). Five databases (PubMed, MEDLINE, Scopus, BIOSIS and Web of Science) were searched for original research articles published up to January 2014. Search terms included ‘high intensity’, ‘HIT’, ‘sprint’, ‘fitness’ and ‘VO2max’. Inclusion criteria were fitness assessed pre- and post-training; training period ≥2 weeks; repetition duration 30–60 s; work/rest ratio 18 years. The final data set consisted of 55 estimates from 32 trials for VO2max, 23 estimates from 16 trials for peak sprint power, and 19 estimates from 12 trials for mean sprint power. Effects on fitness were analysed as percentages via log transformation. Standard errors calculated from exact p values (where reported) or imputed from errors of measurement provided appropriate weightings. Fixed effects in the meta-regression model included type of study (controlled, uncontrolled), subject characteristics (sex, training status, baseline fitness) and training parameters (number of training sessions, repetition duration, work/rest ratio). Probabilistic magnitude-based inferences for meta-analysed effects were based on standardized thresholds for small, moderate and large changes (0.2, 0.6 and 1.2, respectively) derived from between-subject standard deviations (SDs) for baseline fitness. A mean low-volume HIT protocol (13 training sessions, 0.16 work/rest ratio) in a controlled trial produced a likely moderate improvement in the VO2max of active non-athletic males (6.2 %; 90 % confidence limits ±3.1 %), when compared with control. There were possibly moderate improvements in the VO2max of sedentary males (10.0 %; ±5.1 %) and active non-athletic females (3.6 %; ±4.3 %) and a likely small increase for sedentary females (7.3 %; ±4.8 %). The effect on the VO2max of athletic males was unclear (2.7 %; ±4.6 %). A possibly moderate additional increase was likely for subjects with a 10 mL·kg−1·min−1 lower baseline VO2max (3.8 %; ±2.5 %), whereas the modifying effects of sex and difference in exercise dose were unclear. The comparison of HIT with traditional endurance training was unclear (−1.6 %; ±4.3 %). Unexplained variation between studies was 2.0 % (SD). Meta-analysed effects of HIT on Wingate peak and mean power were unclear. Low-volume HIT produces moderate improvements in the aerobic power of active non-athletic and sedentary subjects. More studies are needed to resolve the unclear modifying effects of sex and HIT dose on aerobic power and the unclear effects on sprint fitness.

High-involvement work processes, work intensification and employee well-being

Abstract: Using a national population survey, this article examines how high-involvement work processes affect employee well-being. The analysis shows that greater experiences of autonomy and participation in decision-making have positive or neutral effects. Higher involvement is a key factor predicting higher job satisfaction and better work–life balance while it has no relationship to stress or fatigue. In contrast, higher levels of work intensity increase fatigue and stress and undermine work–life balance. If the quality of working life is a key objective in a reform based on greater employee involvement, close attention needs to be paid to the balance between processes that release human potential and those that increase the intensity of work.

Evolving Connectionist Systems : Methods and Applications in Bioinformatics, Brain Study and Intelligent Machines

Abstract: Prologue.- Part I: Evolving Connectionist Systems: Methods and Techniques.- Evolving Processes and Evolving Connectionist Systems.- Evolving Connectionist Systems for Unsupervised Learning.- Evolving Connectionist Systems for Supervised Learning.- Recurrent Evolving Systems, Reinforcement Learning and Evolving Automata.- Evolving Neuro-Fuzzy Inference Systems.- Evolutionary Computation and Evolving Connectionist Systems.- Evolving Connectionist Machines: A Framework, Biological Motivation.- and Implementation Issues.- Part II: Evolving connectionist systems: Applications in Bioinformatics, Brain Study and Intelligent Systems.- Data Analysis, Modelling and Knowledge Discovery in Bioinformatics.- Dynamic Modelling of Brain Functions and Cognitive Processes.- Modelling the Emergence of Acoustic Segments (Phonemes) in Spoken Languages.- On-Line Adaptive Speech Recognition.- On-Line Image and Video Data Processing.- Evolving Systems for Integrated Multi-Modal Information Processing.- Epilogue.- References.- Extended Glossary.- Subject Index.

A brief review of strength and ballistic assessment methodologies in sport

Abstract: An athletic profile should encompass the physiological, biomechanical, anthropometric and performance measures pertinent to the athlete’s sport and discipline. The measurement systems and procedures used to create these profiles are constantly evolving and becoming more precise and practical. This is a review of strength and ballistic assessment methodologies used in sport, a critique of current maximum strength [one-repetition maximum (1RM) and isometric strength] and ballistic performance (bench throw and jump capabilities) assessments for the purpose of informing practitioners and evolving current assessment methodologies. The reliability of the various maximum strength and ballistic assessment methodologies were reported in the form of intra-class correlation coefficients (ICC) and coefficient of variation (%CV). Mean percent differences $$ \left( {M_{\text{diff}} = \left[ {\frac{{{\mid }X_{{{\text{method}}1}} - X_{{{\text{method}}2}} {\mid }}}{{(X_{{{\text{method}}1}} + X_{{{\text{method}}2}} )}}} \right] \times 100} \right) $$ and effect size (ES = [X method2 − X method1] ÷ SDmethod1) calculations were used to assess the magnitude and spread of methodological differences for a given performance measure of the included studies. Studies were grouped and compared according to their respective performance measure and movement pattern. The various measurement systems (e.g. force plates, position transducers, accelerometers, jump mats, optical motion sensors and jump-and-reach apparatuses) and assessment procedures (i.e. warm-up strategies, loading schemes and rest periods) currently used to assess maximum isometric squat and mid-thigh pull strength (ICC > 0.95; CV 0.91; CV 0.82; CV < 6.5 %) were deemed highly reliable. The measurement systems and assessment procedures employed to assess maximum isometric strength [M Diff = 2–71 %; effect size (ES) = 0.13–4.37], 1RM strength (M Diff = 1–58 %; ES = 0.01–5.43), vertical jump capabilities (M Diff = 2–57 %; ES = 0.02–4.67) and bench throw capabilities (M Diff = 7–27 %; ES = 0.49–2.77) varied greatly, producing trivial to very large effects on these respective measures. Recreational to highly trained athletes produced maximum isometric squat and mid-thigh pull forces of 1,000–4,000 N; and 1RM bench press, back squat and power clean values of 80–180 kg, 100–260 kg and 70–140 kg, respectively. Mean and peak power production across the various loads (body mass to 60 % 1RM) were between 300 and 1,500 W during the bench throw and between 1,500 and 9,000 W during the vertical jump. The large variations in maximum strength and power can be attributed to the wide range in physical characteristics between different sports and athletic disciplines, training and chronological age as well as the different measurement systems of the included studies. The reliability and validity outcomes suggest that a number of measurement systems and testing procedures can be implemented to accurately assess maximum strength and ballistic performance in recreational and elite athletes, alike. However, the reader needs to be cognisant of the inherent differences between measurement systems, as selection will inevitably affect the outcome measure. The strength and conditioning practitioner should also carefully consider the benefits and limitations of the different measurement systems, testing apparatuses, attachment sites, movement patterns (e.g. direction of movement, contraction type, depth), loading parameters (e.g. no load, single load, absolute load, relative load, incremental loading), warm-up strategies, inter-trial rest periods, dependent variables of interest (i.e. mean, peak and rate dependent variables) and data collection and processing techniques (i.e. sampling frequency, filtering and smoothing options).

(Re)presenting ‘sustainable organizations’

Abstract: This paper investigates how organizations represent themselves in relation to sustainable development in 365 publicly available corporate reports from 1992 to 2010. This period of reporting captures the emergence and development of corporate reporting on sustainable development within the context of the study, New Zealand. Laclau and Mouffe’s discourse theory is employed to frame the analysis and interpret the findings. In particular Laclau and Mouffe’s conceptualizations of discourse, identity and group formation, and their theorization of hegemony are drawn upon. The analysis uncovers a changing organizational identity over time. Three distinct identities which capture key organizational representations over time are highlighted: environmentally responsible and compliant organizations; leaders in sustainability; and strategically ‘good’ organizations. The paper demonstrates through an analysis of these evolving identities and their effects, how organizations have maintained a ‘right to speak’ within the sustainable development debate, despite the fundamental challenges and hegemonic threat that a broader reading of sustainable development might imply.

Is the Pain Visual Analogue Scale Linear and Responsive to Change? An Exploration Using Rasch Analysis

Abstract: Objectives Pain visual analogue scales (VAS) are commonly used in clinical trials and are often treated as an interval level scale without evidence that this is appropriate. This paper examines the internal construct validity and responsiveness of the pain VAS using Rasch analysis. Methods Patients (n = 221, mean age 67, 58% female) with chronic stable joint pain (hip 40% or knee 60%) of mechanical origin waiting for joint replacement were included. Pain was scored on seven daily VASs. Rasch analysis was used to examine fit to the Rasch model. Responsiveness (Standardized Response Means, SRM) was examined on the raw ordinal data and the interval data generated from the Rasch analysis. Results Baseline pain VAS scores fitted the Rasch model, although 15 aberrant cases impacted on unidimensionality. There was some local dependency between items but this did not significantly affect the person estimates of pain. Daily pain (item difficulty) was stable, suggesting that single measures can be used. Overall, the SRMs derived from ordinal data overestimated the true responsiveness by 59%. Changes over time at the lower and higher end of the scale were represented by large jumps in interval equivalent data points; in the middle of the scale the reverse was seen. Conclusions The pain VAS is a valid tool for measuring pain at one point in time. However, the pain VAS does not behave linearly and SRMs vary along the trait of pain. Consequently, Minimum Clinically Important Differences using raw data, or change scores in general, are invalid as these will either under- or overestimate true change; raw pain VAS data should not be used as a primary outcome measure or to inform parametric-based Randomised Controlled Trial power calculations in research studies; and Rasch analysis should be used to convert ordinal data to interval data prior to data interpretation.

The global burden of hemorrhagic stroke: a summary of findings from the GBD 2010 study

Abstract: This report summarizes the findings of the GBD 2010 (Global Burden of Diseases, Injuries, and Risk Factors) study for hemorrhagic stroke (HS). Multiple databases were searched for relevant studies published between 1990 and 2010. The GBD 2010 study provided standardized estimates of the incidence, mortality, mortality-to-incidence ratios (MIR), and disability-adjusted life years (DALY) lost for HS (including intracerebral hemorrhage and subarachnoid hemorrhage) by age, sex, and income level (high-income countries [HIC]; low- and middle-income countries [LMIC]) for 21 GBD 2010 regions in 1990, 2005, and 2010. In 2010, there were 5.3 million cases of HS and over 3.0 million deaths due to HS. There was a 47% increase worldwide in the absolute number of HS cases. The largest proportion of HS incident cases (80%) and deaths (63%) occurred in LMIC countries. There were 62.8 million DALY lost (86% in LMIC) due to HS. The overall age-standardized incidence rate of HS per 100,000 person-years in 2010 was 48.41 (95% confidence interval [CI]: 45.44 to 52.13) in HIC and 99.43 (95% CI: 85.37 to 116.28) in LMIC, and 81.52 (95% CI: 72.27 to 92.82) globally. The age-standardized incidence of HS increased by 18.5% worldwide between 1990 and 2010. In HIC, there was a reduction in incidence of HS by 8% (95% CI: 1% to 15%), mortality by 38% (95% CI: 32% to 43%), DALY by 39% (95% CI: 32% to 44%), and MIR by 27% (95% CI: 19% to 35%) in the last 2 decades. In LMIC countries, there was a significant increase in the incidence of HS by 22% (95% CI: 5% to 30%), whereas there was a significant reduction in mortality rates of 23% (95% CI: -3% to 36%), DALY lost of 25% (95% CI: 7% to 38%), and MIR by 36% (95% CI: 16% to 49%). There were significant regional differences in incidence rates of HS, with the highest rates in LMIC regions such as sub-Saharan Africa and East Asia, and lowest rates in High Income North America and Western Europe. The worldwide burden of HS has increased over the last 2 decades in terms of absolute numbers of HS incident events. The majority of the burden of HS is borne by LMIC. Rates for HS incidence, mortality, and DALY lost, as well as MIR decreased in the past 2 decades in HIC, but increased significantly in LMIC countries, particularly in those patients ≤75 years. HS affected people at a younger age in LMIC than in HIC. The lowest incidence and mortality rates in 2010 were in High Income North America, Australasia, and Western Europe, whereas the highest rates were in Central Asia, Southeast Asia, and sub-Saharan Africa. These results suggest that reducing the burden of HS is a priority particularly in LMIC. The GBD 2010 findings may be a useful resource for planning strategies to reduce the global burden of HS.

A systematic review of measures of self-reported adherence to unsupervised home-based rehabilitation exercise programmes, and their psychometric properties

Abstract: Background: Adherence is an important factor contributing to the effectiveness of exercise-based rehabilitation. However, there appears to be a lack of reliable, validated measures to assess self-reported adherence to prescribed but unsupervised home-based rehabilitation exercises. Objectives: A systematic review was conducted to establish what measures were available and to evaluate their psychometric properties. Data sources: MEDLINE, EMBASE, PsycINFO CINAHL (June 2013) and the Cochrane library were searched (September 2013). Reference lists from articles meeting the inclusion criteria were checked to ensure all relevant papers were included. Study selection: To be included articles had to be available in English; use a self-report measure of adherence in relation to a prescribed but unsupervised home-based exercise or physical rehabilitation programme; involve participants over the age of 18. All health conditions and clinical populations were included. Data extraction: Descriptive data reported were collated on a data extraction sheet. The measures were evaluated in terms of eight psychometric quality criteria. Results: 58 studies were included, reporting 61 different measures including 29 questionnaires, 29 logs, two visual analogue scales and one tally counter. Only two measures scored positively for one psychometric property (content validity). The majority of measures had no reported validity or reliability testing. Conclusions: The results expose a gap in the literature for well-developed measures that capture self-reported adherence to prescribed but unsupervised home-based rehabilitation exercises.

Dynamic Accuracy of GPS Receivers for Use in Health Research: A Novel Method to Assess GPS Accuracy in Real-World Settings.

Abstract: The emergence of portable global positioning system (GPS) receivers over the last 10 years has provided researchers with a means to objectively assess spatial position in free-living conditions. However, the use of GPS in free-living conditions is not without challenges and the aim of this study was to test the dynamic accuracy of a portable GPS device under real-world environmental conditions, for four modes of transport, and using three data collection intervals.We selected four routes on different bearings, passing through a variation of environmental conditions in the City of Copenhagen, Denmark, to test the dynamic accuracy of the Qstarz BT-Q1000XT GPS device. Each route consisted of a walk, bicycle and vehicle lane in each direction. The actual width of each walking, cycling and vehicle lane was digitized as accurately as possible using ultra-high-resolution aerial photographs as background. For each trip we calculated the percentage that actually fell within the lane polygon, and within the 2.5, 5 and 10 meter buffers respectively, as well as the mean and median error in meters.Our results showed that 49.6% of all ≈68,000 GPS points fell within 2.5 meters of the expected location, 78.7% fell within 10 meters and the median error was 2.9 m. The median error during walking trips was 3.9 m, 2.0 m for bicycle trips, 1.5 m for bus and 0.5 m for car. The different area types showed considerable variation in the median error: 0.7 m in open areas, 2.6 m in half-open areas and 5.2 m in urban canyons. The dynamic spatial accuracy of the tested device is not perfect, but we feel that it is within acceptable limits for larger population studies. Longer recording periods, for a larger population are likely to reduce the potentially negative effects of measurement inaccuracy. Furthermore, special care should be taken when the environment in which the study takes place could compromise the GPS signal.

Vitamin B12: one carbon metabolism, fetal growth and programming for chronic disease

Abstract: This review brings together human and animal studies and reviews that examine the possible role of maternal vitamin B12 (B12) on fetal growth and its programming for susceptibility to chronic disease. A selective literature review was undertaken to identify studies and reviews that investigate these issues, particularly in the context of a vegetarian diet that may be low in B12 and protein and high in carbohydrate. Evidence is accumulating that maternal B12 status influences fetal growth and development. Low maternal vitamin B12 status and protein intake are associated with increased risk of neural tube defect, low lean mass and excess adiposity, increased insulin resistance, impaired neurodevelopment and altered risk of cancer in the offspring. Vitamin B12 is a key nutrient associated with one carbon metabolic pathways related to substrate metabolism, synthesis and stability of nucleic acids and methylation of DNA which regulates gene expression. Understanding of factors regulating maternal–fetal one carbon metabolism and its role in fetal programming of non communicable diseases could help design effective interventions, starting with maternal nutrition before conception.

Effects of different volume-equated resistance training loading strategies on muscular adaptations in well-trained men.

Abstract: Regimented resistance training has been shown to promote marked increases in skeletal muscle mass. Although muscle hypertrophy can be attained through a wide range of resistance training programs, the principle of specificity, which states that adaptations are specific to the nature of the applied stimulus, dictates that some programs will promote greater hypertrophy than others. Research is lacking, however, as to the best combination of variables required to maximize hypertophic gains. The purpose of this study was to investigate muscular adaptations to a volume-equated bodybuilding-type training program vs. a powerlifting-type routine in well-trained subjects. Seventeen young men were randomly assigned to either a hypertrophy-type resistance training group that performed 3 sets of 10 repetition maximum (RM) with 90 seconds rest or a strength-type resistance training (ST) group that performed 7 sets of 3RM with a 3-minute rest interval. After 8 weeks, no significant differences were noted in muscle thickness of the biceps brachii. Significant strength differences were found in favor of ST for the 1RM bench press, and a trend was found for greater increases in the 1RM squat. In conclusion, this study showed that both bodybuilding- and powerlifting-type training promote similar increases in muscular size, but powerlifting-type training is superior for enhancing maximal strength.

Calcium-Dependent Protein Kinases in Plants: Evolution, Expression and Function

Abstract: Calcium-dependent protein kinases (CPKs) are plant proteins that directly bind calcium ions before phosphorylating substrates involved in metabolism, osmosis, hormone response and stress signaling pathways. CPKs are a large multigene family of proteins that are present in all plants studied to date, as well as in protists, oomycetes and green algae, but are not found in animals and fungi. Despite the increasing evidence of the importance of CPKs in developmental and stress responses from various plants, a comprehensive genome-wide analysis of CPKs from algae to higher plants has not been undertaken. This paper describes the evolution of CPKs from green algae to plants using a broadly sampled phylogenetic analysis and demonstrates the functional diversification of CPKs based on expression and functional studies in different plant species. Our findings reveal that CPK sequence diversification into four major groups occurred in parallel with the terrestrial transition of plants. Despite significant expansion of the CPK gene family during evolution from green algae to higher plants, there is a high level of sequence conservation among CPKs in all plant species. This sequence conservation results in very little correlation between CPK evolutionary groupings and functional diversity, making the search for CPK functional orthologs a challenge.

The global burden of ischemic stroke: findings of the GBD 2010 study.

Abstract: This study sought to summarize the findings of the GBD 2010 (Global Burden of Diseases, Injuries, and Risk Factors) study for ischemic stroke (IS) and to report the impact of tobacco smoking on IS burden in specific countries. The GBD 2010 searched multiple databases to identify relevant studies published between 1990 and 2010. The GBD 2010 analytical tools were used to calculate region-specific IS incidence, mortality, mortality-to-incidence ratio, and disability-adjusted life years (DALY) lost, including 95% uncertainty intervals (UI). In 2010, there were approximately 11,569,000 incident IS events (63% in low- and middleincome countries [LMIC]), approximately 2,835,000 deaths from IS (57% in LMIC), and approximately 39,389,000 DALY lost due to IS (64% in LMIC). From 1990 to 2010, there was a significant increase in global IS burden in terms of absolute number of people with incident IS (37% increase), deaths from IS (21% increase), and DALY lost due to IS (18% increase). Age-standardized IS incidence, DALY lost, mortality, and mortality-to-incidence ratios in high-income countries declined by about 13% (95% UI: 6% to 18%), 34% (95% UI: 16% to 36%), and 37% (95% UI: 19% to 39%), 21% (95% UI: 10% to 27%), respectively. However, in LMIC there was a modest 6% increase in the age-standardized incidence of IS (95% UI: � 7% to 18%) despite modest reductions in mortality rates, DALY lost, and mortality-toincidence ratios. There was considerable variability among country-specific estimates within broad GBD regions. China, Russia, and India were ranked highest in both 1990 and 2010 for IS deaths attributable to tobacco consumption. Although age-standardized IS mortality rates have declined over the last 2 decades, the absolute global burden of IS is increasing, with the bulk of DALY lost in LMIC. Tobacco consumption is an important modifiable risk factor for IS, and in both 1990 and 2010, the top ranked countries for IS deaths that could be attributed to tobacco consumption were China, Russia, and India. Tobacco control policies that target both smoking initiation and smoking cessation can play an important role in the prevention of IS. In China, Russia, and India, even modest reductions in the number of current smokers could see millions of lives saved due to prevention of IS alone.

Learner perspectives on fully online language learning

Abstract: This study builds on this author’s 2011 article in which the author reflects on the pedagogical challenges and resultant changes made while teaching two fully online foreign language papers over a four-year period (Y. H. S. Sun (2011). Online language teaching: The pedagogical challenges. Knowledge Management & E-Learning: An International Journal, 3, 428–447). Drawing on current literature, the present study surveyed learners (n = 46) in an attempt to investigate the difficulties that confronted them and the ways they had adapted to fully online learning. The quantitative and qualitative data obtained from a questionnaire were integrated and analyzed with an inductive method. Results identified six major difficulties: (1) following the schedule and studying regularly, (2) getting hold of classmates and finding suitable time to work together, (3) pairing/teaming up and working collaboratively, (4) ensuring constant engagement with the class, (5) keeping self-motivated and being a self-directed learner, an...

Assessment, Management and Knowledge of Sport-Related Concussion: Systematic Review

Abstract: Sport-related concussions are a subset of mild traumatic brain injuries and are a concern for many sporting activities worldwide. To review and update the literature in regard to the history, pathophysiology, recognition, assessment, management and knowledge of concussion. Searches of electronic literature databases were performed to identify studies published up until April 2013. 292 publications focussing on concussion met the inclusion criteria, and so they were quality rated and reviewed. Concussion is hard to recognize and diagnose. Initial sideline assessment via the Sports Concussion Assessment Tool 3 (SCAT3), Child-SCAT3 or King-Devick test should be undertaken to identify athletes with concussion as part of a continuum of assessment modalities and athlete management. Sports medicine practitioners should be cognisant of the definition, extent and nature of concussion, and should work with coaches, athletes and trainers to identify and manage concussions. The most common reason for variations in management of concussion is lack of awareness of—and confusion about—the many available published guidelines for concussion. Future research should focus on better systems and tools for recognition, assessment and management of concussion. Sport participants’ knowledge of concussion should be evaluated more rigorously, with interventions for sports where there is little knowledge of recognition, assessment and appropriate management of concussion.

The effect of maturation on adaptations to strength training and detraining in 11-15-year-olds

Abstract: To investigate how maturity status modifies the effects of strength training and detraining on performance, we subjected 33 young men to 8 weeks of strength training twice per week followed by 8 weeks without training Changes in performance tests were analyzed in three maturity groups based on years from/to age of predicted peak height velocity (PHV): pre-PHV (-17 ± 04 years; n = 10), mid-PHV (-02 ± 04 years; n = 11), and post-PHV (10 ± 04 years; n = 12) Mean training effects on one repetition maximum strength (36-100%), maximum explosive power (11-20%), jump length (65-74%), and sprint times (-21% to -47%) ranged from small to large, with generally greater changes in mid- and post-PHV groups Changes in force-velocity relationships reflected generally greater increases in strength at faster velocities In the detraining period, the pre-PHV group showed greatest loss of strength and power, the post-PHV group showed some loss of sprint performance, but all groups maintained or improved jump length Strength training was thus generally less effective before the growth spurt Maintenance programs are needed for most aspects of explosive performance following strength training before the growth spurt and for sprint speed after the growth spurt