Fatigue detection in strength training using three-dimensional accelerometry and principal component analysis

Detection of neuro-muscular fatigue in strength training is difficult, due to missing criterion measures and the complexity of fatigue. Thus, a variety of methods are used to determine fatigue. The aim of this study was to use a principal component analysis (PCA) on a multifactorial data-set based on kinematic measurements to determine fatigue. Twenty participants (strength training experienced, 60% male) executed 3 sets of 3 exercises with 50 (12 repetitions), 75 (12 repetitions) and 100%-12 RM (RM). Data were collected with a 3D accelerometer and analysed by a newly developed algorithm to evaluate parameters for each repetition. A PCA with six variables was carried out on the results. A fatigue factor was computed based on the loadings on the first component. One-way ANOVA with Bonferroni post hoc analysis was calculated to test for differences between the intensity levels. All six input variables had high loadings on the first component. The ANOVA showed a significant difference between intensities (p < 0.001). Post-hoc analysis revealed a difference between 100% and the lower intensities (p < 0.05) and no difference between 50 and 75%-12RM. Based on these results, it is possible to distinguish between fatigued and non-fatigued sets of strength training.     

Ethical consumption applications as failed market innovations: exploring consumer (non) acceptance of ‘quasi’ market devices

ABSTRACT

In this paper, I conceptualise ethical consumption applications (ECAs) as market innovations inflected in processes of configuring market actors and market (re)framings. The introduction of ECAs through the work of civil society is not only about changing frames of market exchange, but also work in the register of making ‘good consumers’ and consumers as ‘agents of change’ and moralising markets. Thus, a more accurate concept for these devices is suggested: ‘quasi’ market devices. The main aim of this paper is to analyse how consumers attached to and resisted use of ECAs designed to assist in product choices and shape responsible everyday practices. Based on qualitative fieldwork in Sweden, the article applies a methodology grounded in Science and Technology-inspired market studies in combination with Consumer Culture Theory’s (CCT) interest in identity work and sense-making associated with technology consumption. Although available at the time of the empirical data collection period of the study, all three apps were off the market during the analytic work of this paper; a major argument for focusing on barriers to acceptance of the apps and trying to conceptualise how such non-acceptance can be understood.     

A resourcification manifesto: Understanding the social process of resources becoming resources

In times of major global interconnectedness and environmental change, the pressure to identify, create, and exploit new resources is certain to intensify. Given that there are unavoidable trade-offs, conflicts, and arenas for violence involved when increasingly more material and immaterial things are turned into resources, we call for explicit research on the very process – a process that we label resourcification. The concept of resourcification shifts attention from essentialist queries about the nature of resources to a focus on the social processes through which things are turned into resources. In search of a better understanding of resources in the Anthropocene and, in particular, an understanding about the way resources emerge and are used, resourcification offers a new conceptual framework that allows for a systematic search for knowledge about the diversity of contexts, conditions, modes, and temporalities of resourcification. This Resourcification Manifesto offers a theoretical and empirical framework for a radical and disruptive approach to innovation, sustainability, and management studies and policies.     

Machines and the face of ethics

In this article I try to show in what sense Emmanuel Levinas’ ‘ethics as first philosophy’ moves our ethical thinking away from what has been called ‘centrist ethics’. Proceeding via depictions of the structure of Levinasian ethics and including references to examples as well as to some empirical research, I try to argue that human beings always already find themselves within an ethical universe, a space of meaning. Critically engaging with the writings of David Gunkel and Lucas Introna, I try to argue that these thinkers, rather than clarifying, distort our ethical understanding of how we stand in relation to artefacts. Drawing a distinction between how pervasive our ethical relationship to other human beings, and living animals, is and how the nature of artefacts is tied to us, I conclude by indicating that the aspiration to give artefacts an ethical face suggests a fantasy to avoid ethical responsibility and generates what I call a ‘compensatory logic’.     

Improving Preschoolers’ Numerical Abilities by Enhancing the Home Numeracy Environment

Research Findings: Young children develop numeracy competencies during interactions with more knowledgeable others. Such interactions typically occur in the home numeracy environment (HNE). In this study a nonintensive intervention procedure was developed to improve both the HNE and numerical competencies. All parents of 113 Australian children (age 4 years, 5 months, on average at the beginning of the study) were invited to participate in a 2-part intervention that included attending 1 group meeting at which information regarding the HNE was provided and participating in an additional individual session that introduced them to the principles of counting. The HNE and children’s numerical competencies were assessed before and after the intervention. Participating and nonparticipating families did not differ on any of the study variables at the beginning of the study, yet not only did the intervention group significantly improve their HNE, but children in this group also showed significantly greater numerical competency development compared with the nonparticipating group. Practice or Policy: Results indicate that less intensive interventions can have effects on the HNE and children’s numerical competencies. Consequently, even on small budgets interventions should be undertaken.     

Pattern discernment and pseudo-conceptual development in early childhood mathematics education

In this empirical study, we investigate an early childhood education activity in mathematics on the concept of ‘pattern’. The children participating in the study attend an intermediate form of schooling in Sweden called ‘the preschool class for six-year-olds’, intended to facilitate their transition from preschool to school. Following a prolonged activity over 45 minutes, we analyse for what the children are supported in discerning and what they give as evidence of having discerned in and about patterns. The theoretical point of departure is variation theory, conceptualising learning as increased discernment. The results show that in terms of the important Vygotskian distinction between ‘pseudo concepts’ and ‘concepts (proper)’, the children's discernment and what they are supported in discerning are of the former kind. Pseudo concepts are discussed as integral to the institutional form of the preschool class and premised to be important to the child's further conceptual development.     

Teaching contributions from secondary school subject areas to education for sustainable development – a comparative study of science,social science and language teachers

Abstract

In many countries’ policy documents and curricula, teachers in the subject areas of science, social science and language are encouraged to collaborate on cross-curricular issues such as sustainable development (SD). This study is conducted in secondary schools (compulsory years 7-9) in Sweden and investigates the similarities and differences in the responses of ten teacher groups (forty-three teachers in total) to questions about their teaching contributions in their own subject areas to education for sustainable development (ESD). The overall aim is to understand how teachers of these three subject areas can contribute to cross-curricular teaching in teacher teams in the context of ESD. This is done by analysing the group responses from data collected in group discussions concerning the teaching dimensions what (content), how (methods) and why (purposes) in relation to ESD. We first analyse the teacher group responses and arguments regarding their contribution to ESD teaching from each subject area separately. Thereafter, we comparatively analyse how the different subject areas’ contributions overlap or complement each other in a potential collaborative ESD teaching. The results show that teachers from different subject areas stress different yet complimentary dimensions of teaching and perspectives of ESD. The implications for cross-curricular teaching in ESD are also discussed.     

The effect of gender on students' sustainability consciousness: A nationwide Swedish study

This study extends previous environmental education research on gender differences by investigating the gender gap between boys' and girls' sustainability consciousness. The issue of whether the gender gap in environmental education can be identified also in sustainability education is addressed. It has been suggested that Education for Sustainable Development (ESD) is a teaching approach that could play a key role in diminishing the gender gap. However, the possible gender-specific effect of an ESD-oriented teaching approach is empirically untested. A survey instrument was used to detect the hypothesized gender gap in students' sustainability consciousness on a sample of 2,413 Swedish students aged 12–19. Findings reveal a gender gap in students' sustainability consciousness. The gender gap increases throughout the age span and is amplified in ESD-oriented schools.