A comparison of time-motion performance between age groups in judo matches

The aim of this study was to compare time-motion indicators during judo matches performed by athletes from different age groups. The following age groups were analysed: Pre-Juvenile (13-14 years, n = 522), Juvenile (15-16 years, n = 353); Junior (19 years, n = 349) and Senior (>20 years, n = 587). The time-motion indicators included: Total Combat Time, Standing Combat Time, Displacement Without Contact, Gripping Time, Groundwork Combat Time and Pause Time. Analysis of variance (ANOVA) one-way and the Tukey test, as well as the Kruskal-Wallis test and Mann-Whitney (for non-parametric data), were conducted, using P < 0.05 as significance level. The results showed that all analysed groups obtained a median of 7 (first quantile - 3, third quantile - 12) sequences of combat/pause cycles. In total time of combat, the result was: for Total Combat Time, Standing Combat Time and Gripping Time: Pre-Juvenile and Senior were significantly longer than Juvenile and Junior. Considering Displacement Without Contact, Junior was significantly longer than all other age groups. For Groundwork Combat Time, Senior was significantly longer than all other age groups and Pre-Juvenile was longer than Junior. These results can be used to improve the physiological performance in intermittent practices, as well as technical-tactical training during judo sessions.     

Analysing sexual experiences through ‘scenes’: a framework for the evaluation of sexuality education

This paper describes an alternative approach to undertaking and evaluating sexual health promotion, focusing on the notion of sexual scenes and scenarios and how these can provide a vantage point from which to examine sexual experience. The concept of sexual scenes provides a context within which to analyse many of the behavioural and epidemiological factors associated with sexual practice. In principle, such an approach provides a tool for conscientization, action and the invention of novel group and individual repertoires that may result in individual and social mobilization for health and/or sexual and reproductive rights. Scenes can be elicited through individual interviews, group interviews and discussions, or through staged and dramatized performance and students' writing. Analysing sexual scenes offers an entry point for dialogue in sexual health promotion programming. Evaluation of these programmes can be part of the process of changing sexual scenarios. Change is witnessed not only through individual changes but, especially in impoverished communities, through challenges to dominant local sexual scenarios and engagement with structural concerns.     

Adventure education and resilience: The double-edged sword

Abstract

Adventure education philosophers have argued that controlled exposure to challenge can enhance participants' psychological resilience. This study supports this claim, demonstrating significantly greater gains in psychological resilience for 41 young adults participating in 22-day Outward Bound programs than in a control group. All Outward Bound participants reported positive changes in their resilience and their overall change effect size was large. Perceived levels of social support predicted 24% of the variance in resilience gain scores, with participants' ratings of the least supportive group member being the best predictor. The findings for enhanced resilience and the important role of social support warrant wider investigation. In promoting psychological resilience adventure educators are alerted to the importance of facilitating positive interpersonal relations and minimising the detrimental impact of the diverse needs of group members.     

Complementing subjective with objective data in analysing expertise: A machine-learning approach applied to badminton

ABSTRACT

This study aimed to assess which combination of subjective and empirical data might help to identify the expertise level. A group of 10 expert coaches classified 40 participants in 5 different expertise groups based on the video footage of the rallies. The expertise levels were determined using a typology based on a continuum of 5 conative stages: (1) structural, (2) functional, (3) technical, (4) contextual, and (5) expertise. The video allowed empirical measurement of the duration of the rallies, and tri-axial accelerometers measured the intensity of the player’s involvement. A principal component analysis showed that two dimensions explained 54.9% of the total variance in the data and that conative stage and empirical parameters during rallies (duration, intensity of the game) were correlated with axis 1, whereas duration and acceleration data between rallies were correlated with axis 2. A random forest algorithm showed that among the parameters considered, acceleration, duration of the rallies, and time between rallies could predict conative stages with a prediction accuracy above possibility.

This study suggests that performance analysis benefits from the confrontation of subjective and objective data in order to design training plans according to the expertise level of the participants.     

Religiosity,the headscarf,and education in Turkey: an analysis of 1988 data and current implications

Previous research highlights the continuing relevance of family culture in explaining educational inequalities in Turkey, especially patriarchal beliefs and practices that discourage investment in the education of girls. We extend that research by introducing two much‐debated, but empirically untested, aspects of family culture – parental religiosity and headscarf preferences. An analysis of a nationally representative sample of 15–19 year olds in 1988 shows that while religiosity had no significant effect on educational attainment, children who lived in families whose fathers expected them to wear a headscarf in public had lower educational attainment, especially girls. The large negative headscarf effect suggests that the government ban on headscarves in schools may be an obstacle to eliminating gender inequality in education. The results are discussed in light of recent trends in Turkish society.