Showing papers by "Auckland University of Technology published in 2011"

How many steps/day are enough? for adults

Abstract: Physical activity guidelines from around the world are typically expressed in terms of frequency, duration, and intensity parameters. Objective monitoring using pedometers and accelerometers offers a new opportunity to measure and communicate physical activity in terms of steps/day. Various step-based versions or translations of physical activity guidelines are emerging, reflecting public interest in such guidance. However, there appears to be a wide discrepancy in the exact values that are being communicated. It makes sense that step-based recommendations should be harmonious with existing evidence-based public health guidelines that recognize that "some physical activity is better than none" while maintaining a focus on time spent in moderate-to-vigorous physical activity (MVPA). Thus, the purpose of this review was to update our existing knowledge of "How many steps/day are enough?", and to inform step-based recommendations consistent with current physical activity guidelines. Normative data indicate that healthy adults typically take between 4,000 and 18,000 steps/day, and that 10,000 steps/day is reasonable for this population, although there are notable "low active populations." Interventions demonstrate incremental increases on the order of 2,000-2,500 steps/day. The results of seven different controlled studies demonstrate that there is a strong relationship between cadence and intensity. Further, despite some inter-individual variation, 100 steps/minute represents a reasonable floor value indicative of moderate intensity walking. Multiplying this cadence by 30 minutes (i.e., typical of a daily recommendation) produces a minimum of 3,000 steps that is best used as a heuristic (i.e., guiding) value, but these steps must be taken over and above habitual activity levels to be a true expression of free-living steps/day that also includes recommendations for minimal amounts of time in MVPA. Computed steps/day translations of time in MVPA that also include estimates of habitual activity levels equate to 7,100 to 11,000 steps/day. A direct estimate of minimal amounts of MVPA accumulated in the course of objectively monitored free-living behaviour is 7,000-8,000 steps/day. A scale that spans a wide range of incremental increases in steps/day and is congruent with public health recognition that "some physical activity is better than none," yet still incorporates step-based translations of recommended amounts of time in MVPA may be useful in research and practice. The full range of users (researchers to practitioners to the general public) of objective monitoring instruments that provide step-based outputs require good reference data and evidence-based recommendations to be able to design effective health messages congruent with public health physical activity guidelines, guide behaviour change, and ultimately measure, track, and interpret steps/day.

Developing maximal neuromuscular power: part 2 - training considerations for improving maximal power production.

Abstract: This series of reviews focuses on the most important neuromuscular function in many sport performances: the ability to generate maximal muscular power. Part 1, published in an earlier issue of Sports Medicine, focused on the factors that affect maximal power production while part 2 explores the practical application of these findings by reviewing the scientific literature relevant to the development of training programmes that most effectively enhance maximal power production. The ability to generate maximal power during complex motor skills is of paramount importance to successful athletic performance across many sports. A crucial issue faced by scientists and coaches is the development of effective and efficient training programmes that improve maximal power production in dynamic, multi-joint movements. Such training is referred to as ‘power training’ for the purposes of this review. Although further research is required in order to gain a deeper understanding of the optimal training techniques for maximizing power in complex, sportsspecific movements and the precise mechanisms underlying adaptation, several key conclusions can be drawn from this review. First, a fundamental relationship exists between strength and power, which dictates that an individual cannot possess a high level of power without first being relatively strong. Thus, enhancing and maintaining maximal strength is essential when considering the long-term development of power. Second, consideration of movement pattern, load and velocity specificity is essential when designing power training programmes. Ballistic, plyometric and weightlifting exercises can be used effectively as primary exercises within a power training programme that enhances maximal power. The loads applied to these exercises will depend on the specific requirements of each particular sport and the type of movement being trained. The use of ballistic exercises with loads ranging from 0% to 50% of one-repetition maximum (1RM) and/or weightlifting exercises performed with loads ranging from 50% to 90% of 1RM appears to be the most potent loading stimulus for improving maximal power in complex movements. Furthermore, plyometric exercises should involve stretch rates as well as stretch loads that are similar to those encountered in each specific sport and involve little to no external resistance. These loading conditions allow for superior transfer to performance because they require similar movement velocities to those typically encountered in sport. Third, it is vital to consider the individual athlete’s window of adaptation (i.e. the magnitude of potential for improvement) for each neuromuscular factor contributing to maximal power production when developing an effective and efficient power training programme. A training programme that focuses on the least developed factor contributing to maximal power will prompt the greatest neuromuscular adaptations and therefore result in superior performance improvements for that individual. Finally, a key consideration for the long-term development of an athlete’s maximal power production capacity is the need for an integration of numerous power training techniques. This integration allows for variation within power meso-/micro-cycles while still maintaining specificity, which is theorized to lead to the greatest long-term improvement in maximal power.

How many steps/day are enough? for children and adolescents

Abstract: Worldwide, public health physical activity guidelines include special emphasis on populations of children (typically 6-11 years) and adolescents (typically 12-19 years). Existing guidelines are commonly expressed in terms of frequency, time, and intensity of behaviour. However, the simple step output from both accelerometers and pedometers is gaining increased credibility in research and practice as a reasonable approximation of daily ambulatory physical activity volume. Therefore, the purpose of this article is to review existing child and adolescent objectively monitored step-defined physical activity literature to provide researchers, practitioners, and lay people who use accelerometers and pedometers with evidence-based translations of these public health guidelines in terms of steps/day. In terms of normative data (i.e., expected values), the updated international literature indicates that we can expect 1) among children, boys to average 12,000 to 16,000 steps/day and girls to average 10,000 to 13,000 steps/day; and, 2) adolescents to steadily decrease steps/day until approximately 8,000-9,000 steps/day are observed in 18-year olds. Controlled studies of cadence show that continuous MVPA walking produces 3,300-3,500 steps in 30 minutes or 6,600-7,000 steps in 60 minutes in 10-15 year olds. Limited evidence suggests that a total daily physical activity volume of 10,000-14,000 steps/day is associated with 60-100 minutes of MVPA in preschool children (approximately 4-6 years of age). Across studies, 60 minutes of MVPA in primary/elementary school children appears to be achieved, on average, within a total volume of 13,000 to 15,000 steps/day in boys and 11,000 to 12,000 steps/day in girls. For adolescents (both boys and girls), 10,000 to 11,700 may be associated with 60 minutes of MVPA. Translations of time- and intensity-based guidelines may be higher than existing normative data (e.g., in adolescents) and therefore will be more difficult to achieve (but not impossible nor contraindicated). Recommendations are preliminary and further research is needed to confirm and extend values for measured cadences, associated speeds, and MET values in young people; continue to accumulate normative data (expected values) for both steps/day and MVPA across ages and populations; and, conduct longitudinal and intervention studies in children and adolescents required to inform the shape of step-defined physical activity dose-response curves associated with various health parameters.

Errors in the administration of intravenous medications in hospital and the role of correct procedures and nurse experience

Abstract: Background: Intravenous medication administrations have a high incidence of error but there is limited evidence of associated factors or error severity. Objective: To measure the frequency, type and severity of intravenous administration errors in hospitals and the associations between errors, procedural failures and nurse experience. Methods: Prospective observational study of 107 nurses preparing and administering 568 intravenous medications on six wards across two teaching hospitals. Procedural failures (eg, checking patient identification) and clinical intravenous errors (eg, wrong intravenous administration rate) were identified and categorised by severity. Results: Of 568 intravenous administrations, 69.7% (n¼396; 95% CI 65.9 to 73.5) had at least one clinical error and 25.5% (95% CI 21.2 to 29.8) of these were serious. Four error types (wrong intravenous rate, mixture, volume, and drug incompatibility) accounted for 91.7% of errors. Wrong rate was the most frequent and accounted for 95 of 101 serious errors. Error rates and severity decreased with clinical experience. Each year of experience, up to 6 years, reduced the risk of error by 10.9% and serious error by 18.5%. Administration by bolus was associated with a 312% increased risk of error. Patient identification was only checked in 47.9% of administrations but was associated with a 56% reduction in intravenous error risk. Conclusions: Intravenous administrations have a higher risk and severity of error than other medication administrations. A significant proportion of errors suggest skill and knowledge deficiencies, with errors and severity reducing as clinical experience increases. A proportion of errors are also associated with routine violations which are likely to be learnt workplace behaviours. Both areas suggest specific targets for intervention.

Written Corrective Feedback in Second Language Acquisition and Writing

Abstract: Section One - Introduction 1: What is WCF? Section Two - Theoretical Perspectives 2: Differences and overlap between short-term development 3: Insights from SLA research on oral corrective feedback (OCF ) 4: OCF parallels with WCF Section Three - Evaluating the Empirical Evidence 5: Questions/issues investigated - overview 6: Other empirical questions about WCF Section Four -Applications for Language & Writing Classes 7: Transfer of research findings to classroom practice 8: Teacher education/preparation Section Five - Conclusion 9: Directions/Agenda(s) for future research

Effects of acute alkalosis and acidosis on performance: a meta-analysis.

Abstract: Ingestion of agents that modify blood buffering action may affect high-intensity performance. Here we present a meta-analysis of the effects of acute ingestion of three such agents — sodium bicarbonate, sodium citrate and ammonium chloride — on performance and related physiological variables (blood bicarbonate, pH and lactate). A literature search yielded 59 useable studies with 188 observations of performance effects. To perform the mixed-model meta-analysis, all performance effects were converted into a percentage change in mean power and were weighted using standard errors derived from exact p-values, confidence limits (CLs) or estimated errors of measurement. The fixed effects in the meta-analytic model included the number of performance-test bouts (linear), test duration (log linear), blinding (yes/no), competitive status (athlete/nonathlete) and sex (male/female). Dose expressed as buffering mmoL/kg/body mass (BM) was included as a strictly proportional linear effect interacted with all effects except blinding. Probabilistic inferences were derived with reference to thresholds for small and moderate effects on performance of 0.5% and 1.5%, respectively. Publication bias was reduced by excluding study estimates with a standard error >2.7%. The remaining 38 studies and 137 estimates for sodium bicarbonate produced a possibly moderate performance enhancement of 1.7% (90% CL± 2.0%) with a typical dose of 3.5mmoL/kg/BM (~0.3 g/kg/BM) in a single 1-minute sprint, following blinded consumption by male athletes. In the 16 studies and 45 estimates for sodium citrate, a typical dose of 1.5mmoL/kg/BM (~0.5 g/kg/BM) had an unclear effect on performance of 0.0% (±1.3%), while the five studies and six estimates for ammonium chloride produced a possibly moderate impairment of 1.6% (±1.9%) with a typical dose of 5.5mmoL/kg/BM (~0.3 g/kg/BM). Study and subject characteristics had the following modifying small effects on the enhancement of performance with sodium bicarbonate: an increase of 0.5% (±0.6%) with a 1mmoL/kg/BM increase in dose; an increase of 0.6% (±0.4%) with five extra sprint bouts; a reduction of 0.6% (±0.9%) for each 10-fold increase in test duration (e.g. 1–10 minutes); reductions of 1.1%(±1.1%) with nonathletes and 0.7% (±1.4%) with females. Unexplained variation in effects between research settings was typically ±1.2%. The only noteworthy effects involving physiological variables were a small correlation between performance and pre-exercise increase in blood bicarbonate with sodium bicarbonate ingestion, and a very large correlation between the increase in blood bicarbonate and time between sodium citrate ingestion and exercise. The approximate equal and opposite effects of sodium bicarbonate and ammonium chloride are consistent with direct performance effects of pH, but sodium citrate appears to have some additional metabolic inhibitory effect. Important future research includes studies of sodium citrate ingestion several hours before exercise and quantification of gastrointestinal symptoms with sodium bicarbonate and citrate. Although individual responses may vary, we recommend ingestion of 0.3–0.5 g/kg/BM sodium bicarbonate to improve mean power by 1.7% (±2.0%) in high-intensity races of short duration.

Interactive Processes Link the Multiple Symptoms of Fatigue in Sport Competition

Abstract: Muscle physiologists often describe fatigue simply as a decline of muscle force and infer this causes an athlete to slow down. In contrast, exercise scientists describe fatigue during sport competition more holistically as an exercise-induced impairment of performance. The aim of this review is to reconcile the different views by evaluating the many performance symptoms/measures and mechanisms of fatigue. We describe how fatigue is assessed with muscle, exercise or competition performance measures. Muscle performance (single muscle test measures) declines due to peripheral fatigue (reduced muscle cell force) and/or central fatigue (reduced motor drive from the CNS). Peak muscle force seldom falls by >30% during sport but is often exacerbated during electrical stimulation and laboratory exercise tasks. Exercise performance (whole-body exercise test measures) reveals impaired physical/technical abilities and subjective fatigue sensations. Exercise intensity is initially sustained by recruitment of new motor units and help from synergistic muscles before it declines. Technique/motor skill execution deviates as exercise proceeds to maintain outcomes before they deteriorate, e.g. reduced accuracy or velocity. The sensation of fatigue incorporates an elevated rating of perceived exertion (RPE) during submaximal tasks, due to a combination of peripheral and higher CNS inputs. Competition performance (sport symptoms) is affected more by decision-making and psychological aspects, since there are opponents and a greater importance on the result. Laboratory based decision making is generally faster or unimpaired. Motivation, self-efficacy and anxiety can change during exercise to modify RPE and, hence, alter physical performance. Symptoms of fatigue during racing, team-game or racquet sports are largely anecdotal, but sometimes assessed with time-motion analysis. Fatigue during brief all-out racing is described biomechanically as a decline of peak velocity, along with altered kinematic components. Longer sport events involve pacing strategies, central and peripheral fatigue contributions and elevated RPE. During match play, the work rate can decline late in a match (or tournament) and/or transiently after intense exercise bursts. Repeated sprint ability, agility and leg strength become slightly impaired. Technique outcomes, such as velocity and accuracy for throwing, passing, hitting and kicking, can deteriorate. Physical and subjective changes are both less severe in real rather than simulated sport activities. Little objective evidence exists to support exercise-induced mental lapses during sport. A model depicting mind-body interactions during sport competition shows that the RPE centre-motor cortex-working muscle sequence drives overall performance levels and, hence, fatigue symptoms. The sporting outputs from this sequence can be modulated by interactions with muscle afferent and circulatory feedback, psychological and decision-making inputs. Importantly, compensatory processes exist at many levels to protect against performance decrements. Small changes of putative fatigue factors can also be protective. We show that individual fatigue factors including diminished carbohydrate availability, elevated serotonin, hypoxia, acidosis, hyperkalaemia, hyperthermia, dehydration and reactive oxygen species, each contribute to several fatigue symptoms. Thus, multiple symptoms of fatigue can occur simultaneously and the underlying mechanisms overlap and interact. Based on this understanding, we reinforce the proposal that fatigue is best described globally as an exercise-induced decline of performance as this is inclusive of all viewpoints.

Factors that affect software systems development project outcomes: A survey of research

Abstract: Determining the factors that have an influence on software systems development and deployment project outcomes has been the focus of extensive and ongoing research for more than 30 years. We provide here a survey of the research literature that has addressed this topic in the period 1996–2006, with a particular focus on empirical analyses. On the basis of this survey we present a new classification framework that represents an abstracted and synthesized view of the types of factors that have been asserted as influencing project outcomes.

MOA-2009-BLG-387Lb: a massive planet orbiting an M dwarf

Abstract: Aims. We report the discovery of a planet with a high planet-to-star mass ratio in the microlensing event MOA-2009-BLG-387, which exhibited pronounced deviations over a 12-day interval, one of the longest for any planetary event. The host is an M dwarf, with a mass in the range 0.07 M_⊙ < M_(host) < 0.49 M_⊙ at 90% confidence. The planet-star mass ratio q = 0.0132 ± 0.003 has been measured extremely well, so at the best-estimated host mass, the planet mass is m_p = 2.6 Jupiter masses for the median host mass, M = 0.19 M_⊙. Methods. The host mass is determined from two “higher order” microlensing parameters. One of these, the angular Einstein radius θ_E = 0.31 ± 0.03 mas has been accurately measured, but the other (the microlens parallax πE, which is due to the Earth’s orbital motion) is highly degenerate with the orbital motion of the planet. We statistically resolve the degeneracy between Earth and planet orbital effects by imposing priors from a Galactic model that specifies the positions and velocities of lenses and sources and a Kepler model of orbits. Results. The 90% confidence intervals for the distance, semi-major axis, and period of the planet are 3.5 kpc < D_L < 7.9 kpc, 1.1 AU < a < 2.7 AU, and 3.8 yr < P < 7.6 yr, respectively.

Lactobacillus fermentum (PCC®) supplementation and gastrointestinal and respiratory-tract illness symptoms: a randomised control trial in athletes.

Abstract: Background: Probiotics purportedly reduce symptoms of gastrointestinal and upper respiratory-tract illness by modulating commensal microflora. Preventing and reducing symptoms of respiratory and gastrointestinal illness are the primary reason that dietary supplementation with probiotics are becoming increasingly popular with healthy active individuals. There is a paucity of data regarding the effectiveness of probiotics in this cohort. The aim of this study was to evaluate the effectiveness of a probiotic on faecal microbiology, self-reported illness symptoms and immunity in healthy well trained individuals. Methods: Competitive cyclists (64 males and 35 females; age 35 ± 9 and 36 ± 9 y, VO2max 56 ± 6 and 52 ± 6 ml. kg -1 .min -1 , mean ± SD) were randomised to either probiotic (minimum 1 × 10 9 Lactobacillus fermentum (PCC ® ) per day) or placebo treatment for 11 weeks in a double-blind, randomised, controlled trial. The outcome measures were faecal L. fermentum counts, self-reported symptoms of illness and serum cytokines. Results: Lactobacillus numbers increased 7.7-fold (90% confidence limits 2.1- to 28-fold) more in males on the probiotic, while there was an unclear 2.2-fold (0.2- to 18-fold) increase in females taking the probiotic. The number and duration of mild gastrointestinal symptoms were ~2-fold greater in the probiotic group. However, there was a substantial 0.7 (0.2 to 1.2) of a scale step reduction in the severity of gastrointestinal illness at the mean training load in males, which became more p ronounced as training load increased. The load (duration×severity) of lower respiratory illness symptoms was less by a factor of 0.31 (99%CI; 0.07 to 0.96) in males taking the probiotic compared with placebo but increased by a factor of 2.2 (0.41 to 27) in females. Differences in use of cold and flu medication mirrored these symptoms. The observed effects on URTI had too much uncertainty for a decisive outcome. There were clear reductions in the magnitude of acute exerciseinduced changes in some cytokines. Conclusion: L. fermentum may be a useful nutritional adjunct for healthy exercising males. However, uncertainty in the effects of supplementation on URTI and on symptoms in females needs to be resolved. Trial registration: The trial was registered in the Australia and New Zealand Clinical Trials Registry (ACTRN12611000006943).

Evaluating the impact of wind turbine noise on health-related quality of life.

Abstract: We report a cross-sectional study comparing the health-related quality of life (HRQOL) of individuals residing in the proximity of a wind farm to those residing in a demographically matched area sufficiently displaced from wind turbines. The study employed a nonequivalent comparison group posttest-only design. Self-administered questionnaires, which included the brief version of the World Health Organization quality of life scale, were delivered to residents in two adjacent areas in semirural New Zealand. Participants were also asked to identify annoying noises, indicate their degree of noise sensitivity, and rate amenity. Statistically significant differences were noted in some HRQOL domain scores, with residents living within 2 km of a turbine installation reporting lower overall quality of life, physical quality of life, and environmental quality of life. Those exposed to turbine noise also reported significantly lower sleep quality, and rated their environment as less restful. Our data suggest that wind farm noise can negatively impact facets of HRQOL.

A Cochrane review of the evidence for non-surgical interventions for flexible pediatric flat feet.

Abstract: The pediatric flat foot is a frequent presentation in clinical practice, a common concern to parents and continues to be debated within professional ranks As an entity, it is confused by varied classifications, the notion of well-intended prevention and unsubstantiated, if common, treatment The available prevalence estimates are all limited by variable sampling, assessment measures and age groups and hence result in disparate findings (06-779%) Consistently, flat foot has been found to normally reduce with age The normal findings of flat foot versus children's age estimates that approximately 45% of preschool children, and 15% of older children (average age 10 years) have flat feet Few flexible flat feet have been found to be symptomatic Joint hypermobility and increased weight or obesity may increase flat foot prevalence, independently of age Most attempts at classification of flat foot morphology include the arch, heel position and foot flexibility Usual assessment methods are footprint measures, X-rays and visual (scaled) observations There is no standardized framework from which to evaluate the pediatric flat foot The pediatric flat foot is often unnecessarily treated, being ill-defined and of uncertain prognosis Contemporary management of the pediatric flat foot is directed algorithmically within this review, according to pain, age, flexibility; considering gender, weight, and joint hypermobility When foot orthoses are indicated, inexpensive generic appliances will usually suffice Customised foot orthoses should be reserved for children with foot pain and arthritis, for unusual morphology, or unresponsive cases Surgery is rarely indicated for pediatric flat foot (unless rigid) and only at the failure of thorough conservative management The assessment of the pediatric flatfoot needs to be considered with reference to the epidemiological findings, where there is consensus that pediatric flexible flat foot reduces with age and that most children are asymptomatic Globally, there is need for a standard by which the pediatric flat foot is assessed classified and managed Until then, assessment should utilize the available evidence-based management model, the p-FFP Future research needs to evaluate the pediatric flat foot from representative samples, of healthy and known disease-group children prospectively, and using validated assessment instruments The preliminary findings of the benefits of foot exercises, and discrete investigation into the effects of shoes and footwear use are also warranted

Staging language: An introduction to the sociolinguistics of performance

Abstract: Staged performance involves the overt, scheduled identification and elevation of one or more people to perform, with a clearly demarcated distinction between them and the audience. It involves the agentive use of language, building on the foundation of existing social meanings. Staged performances tend to be linguistically stylized, pushing the limits of language creativity. They have the potential to trigger significant sociolinguistic effects, circulating novel forms and contributing to language change. The paradigms used in this theme issue for approaching language performance include Bakhtin's notion of Stylization, Bell's Audience and Referee Design, Silverstein's Indexicality, Agha's Enregisterment, and Bauman's construct of Discursive Culture. Themes that run through the articles include: a concept of identity that is part product, part process; the centrality of the audience; the reflexivity of staged performance; and the importance of non-linguistic modalities such as music and appearance. The language analysis in this collection of papers concentrates mainly on phonological features of varieties of English, finding instances of selectivity, mis-realization, overshoot and undershoot in their performances of a range of targeted dialects.

Market orientation and manufacturing performance of Indian SMEs: Moderating role of firm resources and environmental factors

Abstract: Purpose – This paper sets out to investigate the link between market orientation and manufacturing performance for small and medium enterprises in India.Design/methodology/approach – The paper collected the data for this research through intensive surveys of the CEOs or top managers of small and medium‐sized enterprises in India. The paper utilized scales, well established in literature, and revalidated them for the Indian context. It also utilized confirmatory factor analysis for scale validation, and hierarchical regression analysis for testing the hypotheses.Findings – This study found a positive link between two sub‐dimensions of market orientation – customer orientation and inter‐functional coordination – and manufacturing performance. Competitor orientation, however, did not have a positive impact on manufacturing performance. Further, the paper found that firm resources and competitive intensity moderate the relationship between some of the sub‐dimensions of market orientation and firm performance....

Effects of Bicycle Saddle Height on Knee Injury Risk and Cycling Performance

Abstract: Incorrect bicycle configuration may predispose athletes to injury and reduce their cycling performance. There is disagreement within scientific and coaching communities regarding optimal configuration of bicycles for athletes. This review summarizes literature on methods for determining bicycle saddle height and the effects of bicycle saddle height on measures of cycling performance and lower limb injury risk. Peer-reviewed journals, books, theses and conference proceedings published since 1960 were searched using MEDLINE, Scopus, ISI Web of Knowledge, EBSCO and Google Scholar databases, resulting in 62 references being reviewed. Keywords searched included 'body positioning', 'saddle', 'posture, 'cycling' and 'injury'. The review revealed that methods for determining optimal saddle height are varied and not well established, and have been based on relationships between saddle height and lower limb length (Hamley and Thomas, trochanteric length, length from ischial tuberosity to floor, LeMond, heel methods) or a reference range of knee joint flexion. There is limited information on the effects of saddle height on lower limb injury risk (lower limb kinematics, knee joint forces and moments and muscle mechanics), but more information on the effects of saddle height on cycling performance (performance time, energy expenditure/oxygen uptake, power output, pedal force application). Increasing saddle height can cause increased shortening of the vastii muscle group, but no change in hamstring length. Length and velocity of contraction in the soleus seems to be more affected by saddle height than that in the gastrocnemius. The majority of evidence suggested that a 5% change in saddle height affected knee joint kinematics by 35% and moments by 16%. Patellofemoral compressive force seems to be inversely related to saddle height but the effects on tibiofemoral forces are uncertain. Changes of less than 4% in trochanteric length do not seem to affect injury risk or performance. The main limitations from the reported studies are that different methods have been employed for determining saddle height, small sample sizes have been used, cyclists with low levels of expertise have mostly been evaluated and different outcome variables have been measured. Given that the occurrence of overuse knee joint pain is 50% in cyclists, future studies may focus on how saddle height can be optimized to improve cycling performance and reduce knee joint forces to reduce lower limb injury risk. On the basis of the conflicting evidence on the effects of saddle height changes on performance and lower limb injury risk in cycling, we suggest the saddle height may be set using the knee flexion angle method (25-30°) to reduce the risk of knee injuries and to minimize oxygen uptake.

Environmental and Firm Level Influences on Inter-Organizational Trust and SME Performance

Abstract: We investigate the effects of focal firm knowledge intensity and uncertainty on inter-organizational trust and subsequent performance of small and medium size enterprises (SMEs). We integrate the trust literature with transaction cost literature as both of these offer partial explanations of the dynamics of inter-organizational trust in the context of an SME. We propose that knowledge intensity of the focal firm will have a positive relationship while uncertainty will have a negative relationship with inter-organizational trust in an exchange relationship. Further, we propose a positive relationship between trust and SME performance, which will be contingent on the level of external and internal uncertainty faced by the focal firm. Empirical evidence, based on the survey data of 565 German SMEs, mostly supports our arguments.

Learning to Be Leaders in Higher Education: What Helps or Hinders Women’s Advancement as Leaders in Universities:

Abstract: This article examines 110 reported incidents from an online survey of 26 women from each of the eight universities in New Zealand. They responded to questions asking them to describe times when work and non-work situations have helped or hindered their advancement in university leadership roles. Five key themes, incorporating a range of factors, emerged as making a difference to advancement as leaders. These themes are: work relationships; university environment; invisible rules; proactivity; and personal circumstances. This research is part of the L-SHIP (Leadership- Supporting Higher Intent & Practice) project and has two main aims. First, to identify factors in universities that help and hinder women’s advancement as leaders, as reported by women; second, to provide useful evidence to underpin the development of programmes supporting women’s advancement in university leadership roles. This research is a first step in the development of the L-SHIP Toolkit for good practice in leadership development in h...

Facilitators and barriers to engagement in physical activity for people with multiple sclerosis: a qualitative investigation

Abstract: Purpose. To explore the barriers and facilitators to engagement in physical activity from the perspective of people with multiple sclerosis (MS). Method. This study adopted a qualitative descriptive design, using semi-structured interviews. Participants were recruited through local MS Societies and one District Health Board as part of a larger study. Ten people with a definite diagnosis of MS were purposefully selected aiming for diversity on a range of characteristics. Results. A number of factors were identified that seemed to interact and work to tip the decisional balance regarding physical activity engagement for people with MS. The most prominent themes included beliefs about physical activity; related emotional responses; and the role of fatigue in the decision to take part in physical activity. One of the most striking findings was the apparent tension surrounding the decision to take part in physical activity which seemed to be related to the co-existence of conflicting beliefs. Conclusions. For people with MS, the decision to engage in physical activity (or not) is complex, fluid and individual; made more complex by the unpredictable nature of MS. Rehabilitation professionals attempting to engage people with MS in a physical activity programme should consider adopting an individualised approach to barrier management which takes into account personal beliefs and perceptions regarding physical activity engagement.

Relational Well-Being and Wealth: Māori Businesses and an Ethic of Care

Abstract: Care is at the heart of the Māori values system, which calls for humans to be kaitiaki, caretakers of the mauri, the life-force, in each other and in nature. The relational Five Well-beings approach, based on four case studies of Māori businesses, demonstrates how business can create spiritual, cultural, social, environmental and economic well-being. A Well-beings approach entails praxis, which brings values and practice together with the purpose of consciously creating well-being and, in so doing, creates multi-dimensional wealth. Underlying the Well-beings approach is an ethic of care and an intrinsic stakeholder view of business.

Occupational Science: Society, Inclusion, Participation

Abstract: Dedication vii About the Editors ix Contributors xi Preface xv Part I: Introduction 1 Introduction to critical perspectives in occupational science 3 Clare Hocking and Gail E Whiteford 2 What would Paulo Freire think of occupational science? 8 Lilian Magalhaes Part II: Understanding occupation 3 Transactionalism: Occupational science and the pragmatic attitude 23 Malcolm P Cutchin and Virginia A Dickie 4 Understanding the discursive development of occupation: Historico-political perspectives 38 Sarah Kantartzis and Matthew Molineux 5 Occupations through the looking glass: Reflecting on occupational scientists ontological assumptions 54 Clare Hocking Part III: Ways of knowing occupation 6 Knowledge paradigms in occupational science: Pluralistic perspectives 69 Elizabeth Anne Kinsella 7 Occupation and ideology 86 Ben Sellar 8 Governing through occupation: Shaping expectations and possibilities 100 Debbie Laliberte Rudman 9 When occupation goes wrong : A critical reflection on risk discourses and their relevance in shaping occupation 117 Silke Dennhardt and Debbie Laliberte Rudman Part IV: Ways of doing in occupational science 10 The case for multiple research methodologies 137 Valerie A Wright-St Clair 11 Occupational choice: The significance of socio-economic and political factors 152 Roshan Galvaan 12 The International Society for Occupational Science: A critique of its role in facilitating the development of occupational science through international networks and intercultural dialogue 163 Alison Wicks Part V: Visioning a way forward 13 Occupation, inclusion and participation 187 Gail E Whiteford and Robert B Pereira Index 209

Virtual reality games for rehabilitation of people with stroke: perspectives from the users.

Abstract: PURPOSE. The purpose of this study is to evaluate the feasibility and users' perspectives of a novel virtual reality (VR) game-based rehabilitation intervention for people with stroke. METHOD. Six people with upper limb hemiplegia participated in a 6-week intervention that involved VR games. A series of eight progressively complex games was developed that required participants to navigate a submarine in a virtual ocean environment. Movement of the submarine was directed by forces applied to an arm interface by the affected limb. Outcome measures included assessments of arm function, questionnaires evaluating the intervention and a semi-structured interview concerning the participants' opinion of the intervention. RESULTS. All participants improved their performance on the games, although there were limited changes in clinical measures of arm function. All participants reported that they enjoyed the intervention with a wide range of overall perceptions of the experience of using VR. Three themes emerging from the interview data were: stretching myself, purpose and expectations of the intervention and future improvements. CONCLUSIONS. Participants found that taking part in this pilot study was enjoyable and challenging. Participants' feedback suggested that the games may be motivating and engaging for future users and have provided a basis for further development of the intervention.