American Association for Health,Physical Education,and Recreation

ABSTRACT

Purpose: The purpose of this study was to identify whether post-resistance exercise (REx) blood flow restriction (BFR) can elicit a similar acute training stimulus to that offered by either heavy REx or traditional low-load BFR REx. Method: Ten men completed trials with 30% one-repetition maximum (1RM) for 5 sets of 15 repetitions without BFR (30%), with BFR during exercise (30% RD), and with postexercise BFR (30% RP) and at 75% 1RM for 3 sets of 10 repetitions. Lactate and cortisol were measured before and up to 60 min after exercise. Thigh circumference, ratings of perceived exertion (RPE), and pain were measured before and after exercise. Surface electromyography was measured during exercise. Results: All conditions had a large effect (effect size [ES] > 0.8) on lactate, with the largest effects observed with the 75% condition; no differences were observed between the 30% conditions. All conditions had a moderate effect (ES > 0.25 ≤ 0.4) on increasing thigh circumference. This effect was maintained (ES = 0.35) with the application of BFR after REx (30% RP). Change in RPE, from the first to last set, was significantly greater with 30% RD compared with other conditions (all p < .05). Electromyography amplitude was higher and percentage change was greater for the 75% condition compared with the other conditions (both p < .05). Conclusions: The application of BFR immediately post-REx altered several of the responses associated with REx that is aimed at inducing muscular hypertrophy. Additionally, these changes occurred with less pain and perceived exertion suggesting that this form of REx may offer an alternative, tolerable method of REx.     

Improving mathematics instruction through lesson study: a theoretical model and North American case

This article presents a theoretical model of lesson study, an approach to instructional improvement that originated in Japan. The theoretical model includes four lesson study features (investigation, planning, research lesson, and reflection) and three pathways through which lesson study improves instruction: changes in teachers’ knowledge and beliefs; changes in professional community; and changes in teaching–learning resources. The model thus suggests that development of teachers’ knowledge and professional community (not just improved lesson plans) are instructional improvement mechanisms within lesson study. The theoretical model is used to examine the “auditable trail” of data from a North American lesson study case, yielding evidence that the lesson study work affected each of the three pathways. We argue that the case provides an “existence proof” of the potential effectiveness of lesson study outside Japan. Limitations of the case are discussed, including (1) the nature of data available from the “auditable trail” and (2) generalizability to other lesson study efforts.

Young children's perceptions of due process in schools’ disciplinary procedures

This study explored how children of lower primary school grades perceive due process in schools’ disciplinary procedures. While many studies have explored how adolescents perceive school discipline, only a few studies have examined the perceptions of primary school pupils, and no study has investigated lower primary school grades. The qualitative research design was based on semi‐structured interviews and focus groups with 70 children, aged 7 to 10, recruited from 19 public schools in Israel. In addition, we recruited a children's advisory group that participated in the research process. The findings revealed that while many of the study participants had internalised a formalistic approach to due process (i.e. meting out uniform punishments in similar cases, in accordance with a closed system of rules), others objected to this approach, providing various reasons for their concerns. Participants’ criticisms of a formalistic due process policy included lack of compassion and lack of understanding of pupils’ social, academic or other difficulties, disregard of pupils’ voice, the complex task of discerning the truth, apprehension over a uniform punitive system and low efficacy of punishments. We argue that the right to due process in schools lies at the intersection of legal and educational narratives. Even young children are able to recognise the inherent incongruity of these narratives, as they constitute a significant part of their daily routine in school. We also argue that this incongruity engenders a distorted due process, thus imparting faulty lessons about the right to due process and its justifications.     

Bond graph based sensitivity and uncertainty analysis modelling for micro-scale multiphysics robust engineering design

Components within micro-scale engineering systems are often at the limits of commercial miniaturization and this can cause unexpected behavior and variation in performance. As such, modelling and analysis of system robustness plays an important role in product development. Here, schematic bond graphs are used as a front end in a sensitivity analysis based strategy for modelling robustness in multi-physics micro-scale engineering systems. As an example, the analysis is applied to a behind-the-ear (BTE) hearing aid.By using bond graphs to model power flow through components within different physical domains of the hearing aid, a set of differential equations to describe the system dynamics is collated. Based on these equations, sensitivity analysis calculations are used to approximately model the nature and the sources of output uncertainty during system operation. These calculations represent a robustness evaluation of the current hearing aid design and offer a means of identifying potential for improved designs of multiphysics systems by way of key parameter identification.     

Academic penetration in faculty collective bargaining contracts in higher education

The purpose of this research was to analyze faculty collective bargaining contracts at 124 institutions of higher education that had a 10-year history of collective bargaining from 1975 to 1985 to determine if contracts negotiated in 1975 significantly differed from those negotiated in 1985 with regard to 18 selected academic items. Each academic item in both the 1975 and 1985 contracts was coded according to a scaling code with rankings showing the direction of faculty control. The findings revealed that the 1985 contracts contained both an increased number of academic items and an increased level of faculty control over most of those academic items compared with the 1975 contracts.     

Starting school in Australia is ‘a bit safer,a lot easier and more relaxing’: issues for families and children from culturally and linguistically diverse backgrounds

The project described in this paper investigated the needs and concerns identified by parents from culturally and linguistically diverse backgrounds as their children started school in Sydney, Australia. Six groups of parents from Arabic, Bengali, Chinese, Samoan, Turkish and Vietnamese language backgrounds were interviewed about what was important for them to know and/or do as their children started school. In particular, parents were asked to identify information which would have been helpful for them, and that should be available to parents with children starting school. The data obtained were compared with data derived from Australian parents whose first language is English. The results indicate that there are some issues which seem to be of concern to most parents, regardless of their cultural or language background, such as parents' desire for children to be happy and confident at school, as well as some more specific issues for some groups.     

Mothers’ and Fathers’ Reports of Their Supportive Responses to Their Children’s Negative Emotions Over Time

Objective. Parents’ emotion socialization practices are thought to be moderately stable over time; however, a partner’s socialization practices could initiate change. Design. We examined mothers’ and fathers’ reports of their supportive responses to their children’s negative emotions when the target child was 7 years old and again at age 10. We tested a dyadic, longitudinal path model with 111 mother–father pairs. Results. Significant actor and partner effects emerged: Parents’ age 7 responses predicted their own age 10 responses and their partners’ later responses. Conclusions. Parents’ reported responses to children’s negative emotions during middle childhood are predicted by their own earlier responses and by their partners’ responses.