Golf styles and centre of pressure patterns when using different golf clubs

Abstract

When using a driver, the centre of pressure of a golfer shows a pattern that is characteristic of one of two distinct swing styles: the “front foot” style or the “reverse” style. The aim of this study was to establish whether these two swing styles are also evident when using other clubs, and if so, to determine whether golfers use the same swing style when using different clubs. Forty-six professional, amateur, and recreational golfers performed swings to hit a ball into a net placed 3 m away. Ten swings were performed for each of the driver, 3-iron, and 7-iron while standing on two force plates. The position of the golfer's centre of pressure parallel with the line of shot and relative to the feet was quantified at eight swing events that were identified from 200-Hz video. Cluster analysis confirmed that the front foot and reverse styles were evident in all three clubs, and most of the golfers (96%) used the same swing style for all three clubs. Golfers that used the reverse swing positioned their centre of pressure nearer to their toes at ball contact compared with golfers that used the front foot swing.     

Mathematics and Science Learning Opportunities in Preschool Classrooms

Research Findings: The present study observed and coded instruction in 65 preschool classrooms to examine (a) overall amounts and (b) types of mathematics and science learning opportunities experienced by preschool children as well as (c) the extent to which these opportunities were associated with classroom and program characteristics. Results indicated that children were afforded an average of 24 and 26 min of mathematics and science learning opportunities, respectively, corresponding to spending approximately 25% of total instructional time in each domain. Considerable variability existed, however, in the amounts and types of mathematics and science opportunities provided to children in their classrooms; to some extent, this variability was associated with teachers' years of experience, teachers' levels of education, and the socioeconomic status of children served in the program. Practice or Policy: Although results suggest greater integration of mathematics and science in preschool classrooms than previously established, there was considerable diversity in the amounts and types of learning opportunities provided in the preschool classrooms. Affording mathematics and science experiences to all preschool children as outlined in professional and state standards may require additional professional development aimed at increasing preschool teachers' understanding and implementation of learning opportunities in these 2 domains in their classrooms.     

Graduate pathways: A longitudinal study of graduates in outdoor studies in the U.K.

A longitudinal study provides a more detailed analysis of the career pathways of graduates than the First Destination Survey can achieve. This survey of 41% of graduates from a BSc (Honours) Outdoor Studies degree also examines the importance of named skills to their careers and the success of the degree in developing each skill. Two thirds of graduates surveyed were in careers related to Outdoor Studies and there is an increasing relevance of employment activity to degree and work satisfaction with time in the workplace. However, there is no trend towards increasing graduate level employment in the workplace with indications that the majority of Outdoor Studies graduates seem to make choices based on interest, values or work satisfaction rather than salary or status, beyond a baseline of earnings (which contributes to a low unemployment rate). Personal and process skills, often poorly developed in other degree programmes, are developed successfully within the Outdoor Studies degree and applied in the workplace. It is suggested that suitably qualified Outdoor Studies graduates are able to find employment in the outdoor industry but that this will need monitoring in the future. The need for, and the development of, outdoor technical skills may be illustrative of a circular argument but graduates report the need for further National Governing Body award opportunities and professional experience at undergraduate level.     

Reading and spelling acquisition in Thai children

Thai, a tonal language, has its own distinctive alphabetic orthography. The study investigates reading and spelling development in Thai children, with an aim of examining the grain size that is predominantly used when reading and spelling. Furthermore, word and nonword lists were developed to examine the acquisition of the complex system of vowels and tone rules in Thai. Reading and spelling of words and nonwords were assessed in 60 Thai children ranging in age from 7 to 9 years 8 months from Grade(s) 1, 2, and 3. A lexicality effect was found for both reading and spelling. Spelling lagged behind reading in the Grade 1 children. Development rapidly increased between the youngest Grade 1 children and the older Grade 2 and 3 children. For word reading there were significantly more lexical errors than phonological errors. Beginning readers appear to predominantly use a larger lexico-syllabic grain size to read Thai.     

Creating a Progress‐Monitoring System in Reading for Middle‐School Students: Tracking Progress Toward Meeting High‐Stakes Standards

In this study, we examined the reliability and validity of curriculum‐based measures (CBM) in reading for indexing the performance of secondary‐school students. Participants were 236 eighth‐grade students (134 females and 102 males) in the classrooms of 17 English teachers. Students completed 1‐, 2‐, and 3‐minute reading aloud and 2‐, 3‐, and 4‐minute maze selection tasks. The relation between performance on the CBMs and the state reading test were examined. Results revealed that both reading aloud and maze selection were reliable and valid predictors of performance on the state standards tests, with validity coefficients above .70. An exploratory follow‐up study was conducted in which the growth curves produced by the reading‐aloud and maze‐selection measures were compared for a subset of 31 students from the original study. For these 31 students, maze selection reflected change over time whereas reading aloud did not. This pattern of results was found for both lower‐ and higher‐performing students. Results suggest that it is important to consider both performance and progress when examining the technical adequacy of CBMs. Implications for the use of measures with secondary‐level students for progress monitoring are discussed.     

Comprehensive Student Profiling: Furthering Academic and Pastoral Care Objectives

Comprehensive student profiling is described as an alternative to exclusively teacher-controlled, academic subject focused records of students' progress. Features of profiling that are highlighted include its multidimensionality, participatory nature, and formative and summative functions. The rationale for adopting comprehensive student profiling rather than relying only on discrete, norm-referenced performance evaluations is discussed with reference to the historical innovation and eventual nation-wide adoption of profiling in British schools and the developmental objectives of the pastoral care movement in Singapore schools.     

Reliability of power output measurements during repeated treadmill sprinting in rugby players

The non-motorized treadmill system initially reported by Lakomy in 1984 has been used extensively to assess sprinting performance. However, there has been limited research into the reliability of power output measurement using such systems. The aim of this study was to design a system and protocol capable of measuring treadmill sprinting performance in rugby players and to assess the reliability of this system for measuring power output. Twenty-seven rugby players, all of whom were familiar with treadmill sprinting, performed three maximal 6 s sprints with 2 min recovery between sprints, on two occasions 1 week apart. Both tests were performed on a non-motorized Woodway tramp treadmill, interfaced to a data acquisition system. There were no significant differences (P > 0.05) between power output for repeated trials on the same day (between trials) or for repeated trials on different days (between days). Limits of agreement for maximum average power (the average of 100 readings per second) were 4+/-98 and 30+/-157 W for between trials and between days, respectively. When reported as ratio limits of agreement, these were 1.07 (*/divided 1.12) and 1.03 (*/divided 1.16), respectively. The limits of agreement for maximum instantaneous power (the highest of 100 readings per second) were 51+/-464 and 105+/-588 W for between trials and between days, respectively. When reported as ratio limits of agreement, these were 1.02 (*/divided 1.20) and 1.04 (*/divided 1.21) for between trials and between days, respectively. The coefficients of variation for all measures of power output were less than 9.3%. Hence, the treadmill system and protocol developed in this study provide a reliable measure of power output for rugby players.