Three-dimensional anthropometric analysis: Differences between elite Australian rowers and the general population

Abstract

The aim of this study was to quantify the anthropometric differences between elite senior Australian rowers and the Australian adult population using three-dimensional (3D) whole-body scanning. The dimensions of senior rowers competing at the 2007–2008 Australian Rowing Championships were compared with those of an age-matched sample of Australian adults. Mass, height, and sitting height were measured before the participants underwent a 3D whole-body scan, with lengths, breadths, girths, cross-sectional and surface areas, and volumes extracted from each scan. Differences in means and variability between the two groups were expressed as standardized effect sizes and ratios of coefficients of variation. Heavyweight rowers were generally much larger than the general population in absolute size, with 3D dimensions and height and mass showing the largest effects. In contrast, lightweight rowers were generally similar or smaller in absolute and proportional size. The dimensions of rowers, especially the lightweights, were also generally less variable than those of the general population. The greatest differences between elite rowers and the general population were seen in dimensions that could not be captured without 3D scanning, such as segmental volumes and cross-sectional areas.     

Effect of sand versus grass training surfaces during an 8-week pre-season conditioning programme in team sport athletes

Abstract

This study compared the use of sand and grass training surfaces throughout an 8-week conditioning programme in well-trained female team sport athletes (n = 24). Performance testing was conducted pre- and post-training and included measures of leg strength and balance, vertical jump, agility, 20 m speed, repeat speed (8 × 20 m every 20 s), as well as running economy and maximal oxygen consumption (VO_2max). Heart rate (HR), training load (rating of perceived exertion (RPE) × duration), movement patterns and perceptual measures were monitored throughout each training session. Participants completed 2 × 1 h conditioning sessions per week on sand (SAND) or grass (GRASS) surfaces, incorporating interval training, sprint and agility drills, and small-sided games. Results showed a significantly higher (P < 0.05) HR and training load in the SAND versus GRASS group throughout each week of training, plus some moderate effect sizes to suggest lower perceptual ratings of soreness and fatigue on SAND. Significantly greater (P < 0.05) improvements in VO_2max were measured for SAND compared to GRASS. These results suggest that substituting sand for grass training surfaces throughout an 8-week conditioning programme can significantly increase the relative exercise intensity and training load, subsequently leading to superior improvements in aerobic fitness.     

Lower limb joint kinetics during the first stance phase in athletics sprinting: three elite athlete case studies

Abstract

This study analysed the first stance phase joint kinetics of three elite sprinters to improve the understanding of technique and investigate how individual differences in technique could influence the resulting levels of performance. Force (1000 Hz) and video (200 Hz) data were collected and resultant moments, power and work at the stance leg metatarsal-phalangeal (MTP), ankle, knee and hip joints were calculated. The MTP and ankle joints both exhibited resultant plantarflexor moments throughout stance. Whilst the ankle joint generated up to four times more energy than it absorbed, the MTP joint was primarily an energy absorber. Knee extensor resultant moments and power were produced throughout the majority of stance, and the best-performing sprinter generated double and four times the amount of knee joint energy compared to the other two sprinters. The hip joint extended throughout stance. Positive hip extensor energy was generated during early stance before energy was absorbed at the hip as the resultant moment became flexor-dominant towards toe-off. The generation of energy at the ankle appears to be of greater importance than in later phases of a sprint, whilst knee joint energy generation may be vital for early acceleration and is potentially facilitated by favourable kinematics at touchdown.     

Sport studies

The sport-for-development movement has grown exponentially in the last decade generating increasing academic attention. However, existing research has rarely sought the views of young people despite them being both the main target audience of initiatives and frequently the deliverers. This paper seeks to address young people's absence within research and advocate the importance of engaging them in sport-for-development debates to enhance understanding of current delivery and to improve policy and practice in the future. The paper examines Zambian young people's views of HIV/AIDS peer-led education delivered through sport considering particularly whether young people believe such interventions can encourage empowerment and subsequent behaviour change. The paper outlines the importance of improving understanding of how young people can begin to translate knowledge into agency. The paper concludes with the suggestion that change is more likely if peer-led education through sport programmes are combined with multi-layered interventions directed at all levels of communities.     

The regulation of transnational higher education in Southeast Asia: Case studies of Hong Kong, Malaysia and Australia

The millennium round of the General Agreement on Tradein Services (GATS) underlines issues relating to the regulationof education as an internationally traded service. Transnationaleducation is a key component of such trade. Southeast Asia issomething of a laboratory in the development and regulation oftransnational education. The region combines high demand, keencompetition among providers, and host country regulatory regimesranging from relatively laissez faire to strongly interventionist.This paper examines the approaches of three Southeast Asiangovernments – Hong Kong, Malaysia and Australia – to theregulation of transnational education within their borders. Ineach case the authors provide background on the higher educationsystem, describe the regulatory approaches to transnationaleducation, and analyse the motivations behind regulation. Boththe neoliberal approach of the WTO to trade in educationalservices, and critiques of this approach, are outlined. Theauthors conclude that any attempts to promote global standards orquality principles for transnational education must address themyriad concerns of governments, including consumer protection,advancing national goals and protecting the local system.     

Higher prevalence of childhood sexual abuse among Latino men who have sex with men than non-Latino men who have sex with men: data from the Urban Men's Health Study

OBJECTIVE: The prevalence of childhood sexual abuse among Latino adult men who have sex with men who live in the US was estimated because a history of childhood sexual abuse increases HIV sexual risk behaviors and other negative health outcomes in adulthood. METHOD: The Urban Men's Health Study is a random-digit telephone probability survey of 2881 adult men who have sex with men (MSM) aged 18 years or older residing in San Francisco, New York, Los Angeles, and Chicago. Self-reported history of childhood sexual abuse was the main outcome measure gathered from 2692 MSM. RESULTS: A significantly higher proportion of Latino MSM reported sexual abuse before age 13 (22%) than did non-Latino MSM (11%). CONCLUSIONS: Latino MSM are twice as likely to report a history of childhood sexual abuse than are non-Latino MSM. Given the association between childhood sexual abuse and increased risk for HIV and other negative health outcomes, health providers must remain vigilant to the possibility of childhood sexual abuse histories among their Latino patients.     

Difficulties in defining mobile learning: analysis,design characteristics,and implications

Educational technology research and development - Mobile learning, or m-learning, has become an umbrella term for the integration of mobile computing devices within teaching and learning. In the...     

‘The right path of equality’: supporting high school students with autism who type to communicate

The inclusion of students who type to communicate has been researched and strategies to accommodate such students have been recommended, but little information has been gathered about the students’ perspectives and daily school lives. This study utilises classroom observations and qualitative interviewing to explore the experiences of three high school students who type to communicate and the systems in place to support them. The study privileges and focuses on the ways that their school personnel honour the voices of those students as contributors to the construction of the spaces they enter and ways in which their active participation is supported.