Do regression-based computer algorithms for determining the ventilatory threshold agree?

The determination of the ventilatory threshold has been a persistent problem in research and clinical practice. Several computerized methods have been developed to overcome the subjectivity of visual methods but it remains unclear whether different computerized methods yield similar results. The purpose of this study was to compare nine regression-based computerized methods for the determination of the ventilatory threshold. Two samples of young and healthy volunteers (n = 30 each) participated in incremental treadmill protocols to volitional fatigue. The ventilatory data were averaged in 20-s segments and analysed with a computer program. Significant variance among methods was found in both samples (Sample 1: F = 11.50; Sample 2: F = 11.70, P < 0.001 for both). The estimates of the ventilatory threshold ranged from 2.47 litres.min(-1) (71% VO2max) to 3.13 litres.min(-1) (90% VO2max) in Sample 1 and from 2.37 litres.min(-1) (67% VO2max) to 3.03 litres.min(-1) (83% VO2max) in Sample 2. The substantial differences between methods challenge the practice of relying on any single computerized method. A standardized protocol, likely based on a combination of methods, might be necessary to increase the methodological consistency in both research and clinical practice.     

Passion in sport: on the quality of the coach-athlete relationship

Vallerand et al. (2003) developed a dualistic model of passion, wherein two types of passion are proposed: harmonious (HP) and obsessive (OP) passion that predict adaptive and less adaptive interpersonal outcomes, respectively. In the present research, we were interested in understanding the role of passion in the quality of coach-athlete relationships. Results of Study 1, conducted with athletes (N=157), revealed that HP positively predicts a high-quality coach-athlete relationship, whereas OP was largely unrelated to such relationships. Study 2 was conducted with coaches (N=106) and showed that only HP positively predicted the quality of the coach-athlete relationship. Furthermore, these effects were fully mediated by positive emotions. Finally, the quality of the coach-athlete relationship positively predicted coaches' subjective well-being. Future research directions are discussed in light of the dualistic model of passion.     

The Maintenance of Masculinity Among the Stakeholders of Sport

Feminist and hegemony theorizing are used to explicate how sport and its ancillary organizations and occupations have managed to reproduce its masculinized nature despite the gains of second wave feminism that characterizes the broader culture. The author shows that contemporary sporting institutions largely originated as a political enterprise to counter the first wave of feminism, and describe how gender-segregation and self-selection permits sports’ gatekeepers to near-exclusively draw upon a relatively homogenous group of hyper-masculine, over-conforming, failed male athletes to reproduce the institution as an extremely powerful gender-regime. The author suggests that, because orthodox notions of masculinity are institutionally codified within sport, it will take more than affirmative action programs to bring gender equality off the pitch; it will also require gender-integration on the pitch.     

Transient analysis of three-phase power systems,part I

The application of symmetrical components to the solution of steady state problems in power systems engineering suggests the application of the same or similar components in the study of transient phenomena on the network calculating board by means of oscilloscope and synchronous switch. However, it is found upon rigorous examination that symmetrical components are applicable to such problems in but a few types of switching. Part II of this paper will deal with a system of components which serve well in all cases of transient phenomena produced by short circuits, the operation of circuit breakers or other apparatus.     

The ‘origins of football debate’ and the early development of the game in Nottinghamshire

This article continues the debate on the origins of football. It contains new data which note early football activity and initial club formation in Nottinghamshire. The authors reach the conclusion that former public schoolboys were prominent in the development of football in that particular area and see this as further confirmation of their hypothesis that many of these individuals should be seen as important in the establishment of football as a modern sport.     

Working and spending in South China: a methodological experiment with visual ethnography

Abstract

Art and architecture played a role in expressions of Malaya's nascent independent state in 1957, but the determination of what Malaya meant, ideologically, was different to different groups. Two types of nationalism were at work, namely that led by ethnic Malay leaders and political parties, and that led by a more ethnically-inclusive set of leaders and groups. This paper explores these concepts as frozen in mural paintings and the accompanying national architecture.     

Normative fat-free mass index values for a diverse sample of collegiate female athletes

The purpose of this study was to establish normative fat-free mass index (FFMI) ranges in collegiate female athletes. A sample of 266 female athletes (Mean±SD; Age: 19.7 ± 1.5 yrs, Height: 166.0 ± 6.4 cm, Weight: 63.2 ± 8.8 kg) were included in analyses. Dual-energy X-ray absorptiometry measured bone mineral content (BMC; kg) and lean mass (LM; kg). Fat-free mass index was calculated as follows: FFMI = (BMC + LM)/Height². Participants were classified by sport: cross-country (XC), field hockey, football, gymnastics, lacrosse, resistance-trained, swimming track. Mean, range and percentile ranks of FFMI were calculated for the full sample for each cohort. For all females, mean FFMI was 16.9 ± 1.7 kg/m², FFMI values ranged from 13.3 to 25.5 kg/m². The XC athletes had the lowest FFMI (15.3 ± 0.96 kg/m²; p < 0.001). Mean FFMI measures were similar between all other female athletes. Percentile ranks varied across sport; median FFMI was highest for football (18.0 kg/m²), lowest for XC (15.1 kg/m²) and ranged between 16.4 and 17.3 kg/m² for all other athletes. Establishing sport-specific FFMI values for female athletes may be beneficial for athletes and coaches by leading to more appropriate body composition goals based on FFM.     

Formalism and strategic fouls

It is sometimes claimed that formalism and the logical incompatibility thesis together imply that fouls cannot be part of the game. Some philosophers think this proves that therefore strategic fouls are always morally wrong, but other philosophers think this result undermines formalism itself, since strategic fouls clearly are part of the game and are at least sometimes morally permissible. I show that formalism in fact does accommodate strategic fouls and that it is neutral about whether strategic fouls are morally permissible or not.     

Can We Trust Information?

Why do we demand more of the quality of food or a car than we demand of that other essential: information? Reliability and authenticity determine the credibility and the usefulness of information. These concepts, developed in different cultures and at different times, are essential for our information society in its dependence on trust in information. In the creation and distribution of digital information, conditions should be met to ensure the reliability and authenticity of the information.