Lifestyle, body composition, and physical fitness changes in Hungarian school boys (1975-2005)

General socioeconomic conditions as well as the physical environment have undergone remarkable changes in Hungary during the past 30 years. Unfortunately, these positive processes have resulted in a reduction of habitual physical activity along with unfavorable changes in dietary habits. Therefore, the purpose of the present study was to compare some selected morphological and functional parameters of 7-14-year-old Hungarian schoolboys living in the middle of the 1970s and at the beginning of the new millennium. It was hypothesized that there would be significant differences in morphological and functional characteristics of the Hungarian schoolboy populations, because they were assessed 30 years apart. Means of height, body mass, body mass index (BMI), the sum of five skinfold tests, percentage of body fat, and two running performance times (400 m and 1,200 m) of the boys (N = 3,672) studied in 1975 were compared to those of the boys (N = 3,758) in 2005. Data were analyzed using two-tailed independent samples t tests (p < .05). We observed significant secular changes in body mass and height. In addition, boys in 2005 had significantly more subcutaneous fat compared to 1975. The running times for the two distances were significantly poorer at the time of the second investigation. The remarkable and unfavorable changes in body composition and cardiorespiratory performance were attributed to the continuously decreasing intensity of habitual physical exercise and a lifestyle that had become more sedentary (watching TV playing computer games, etc.). Radical interventions are necessary to reduce these risks associated with the high prevalence of cardiovascular disease in Hungary, and the challenge to resolve the problem requires combined efforts at the educational, societal, corporate, and governmental levels.     

Distribution of lower extremity work during clean variations performed with different effort

The purpose of this research was to investigate how lower extremity work was distributed during the pull of cleans performed lifting the barbell to the minimum height required to receive it in a full squat (minimal height clean); or with maximum effort to elevate the barbell as high as possible and receiving it in either a full (maximal effort clean) or partial (power clean) squat. Eight weightlifters screened for proficient technique performed these clean variations at 80% of one repetition maximum. Work performed on the barbell and by the lower extremity net joint moments (NJM) was computed from marker trajectories and ground reaction forces. Total barbell work, lower extremity NJM work, knee extensor work, and knee joint excursion during the second pull was lower in the minimal height clean than the maximal effort and power cleans (P < 0.05). This research demonstrates that more knee extensor work is performed in the second pull of maximal effort and power cleans compared to the minimal height clean. The larger knee extensor work performed is due to larger knee joint excursion during the second pull of the maximal effort and power cleans, but not larger knee extensor NJM.     

Rhetoric and realities of London 2012 Olympic education and participation ‘legacies’: voices from the core and periphery

A legacy emphasis was one of the fundamental pillars of the London 2012 Olympic Games. The notion of an Olympic legacy was predicated on assumptions that the event's value would not purely derive from the sporting spectacle, but rather from the ‘success’ of enduring effects met out in London and across the country. For physical education students and practitioners, Olympic legacy agendas translated into persistent pressure to increase inspiration, engagement, participation and performance in the subject, sport and physical activity. Responding to this context, and cognizant of significant disciplinary scholarship, this paper reports initial data from the first phase of a longitudinal study involving Key Stage Three (students aged 11–13) cohorts in two comparable United Kingdom schools: the first an inner-city (core) London school adjacent to the Olympic Park in Stratford, East London (n = 150); the second a (peripheral) school in the Midlands (n = 198). The research involved the use of themed questionnaires focusing on self-reported attitudes towards the Olympic Games and experiences of physical education, sport and physical activity. Students from both schools demonstrated a wide variety of attitudes towards physical education and sport; yet, minor variances emerged regarding extreme enthusiasm levels. Both cohorts also expressed considerably mixed feelings towards the impending Olympic Games. Strong and variable responses were also reported regarding inspiration levels, ticketing acquisition and engagement levels. Consequently, this investigation can be read within the broader context of legacy debates and aligns well with physical educationalists' ongoing discomfort regarding legacy imperatives being enforced upon the discipline and its practitioners. Our work reiterates a shared disciplinary scepticism that while an Olympic Games may temporarily affect young peoples' affectations for sport (and maybe physical education and physical activity), it may not provide the best, or most appropriate, mechanism for sustained attitudinal and/or social changes en masse.     

The microfluidics of the eccrine sweat gland,including biomarker partitioning,transport, and biosensing implications

Non-invasive and accurate access of biomarkers remains a holy grail of the biomedical community. Human eccrine sweat is a surprisingly biomarker-rich fluid which is gaining increasing attention. This is especially true in applications of continuous bio-monitoring where other biofluids prove more challenging, if not impossible. However, much confusion on the topic exists as the microfluidics of the eccrine sweat gland has never been comprehensively presented and models of biomarker partitioning into sweat are either underdeveloped and/or highly scattered across literature. Reported here are microfluidic models for eccrine sweat generation and flow which are coupled with review of blood-to-sweat biomarker partition pathways, therefore providing insights such as how biomarker concentration changes with sweat flow rate. Additionally, it is shown that both flow rate and biomarker diffusion determine the effective sampling rate of biomarkers at the skin surface (chronological resolution). The discussion covers a broad class of biomarkers including ions (Na⁺, Cl⁻, K⁺, NH₄⁺), small molecules (ethanol, cortisol, urea, and lactate), and even peptides or small proteins (neuropeptides and cytokines). The models are not meant to be exhaustive for all biomarkers, yet collectively serve as a foundational guide for further development of sweat-based diagnostics and for those beginning exploration of new biomarker opportunities in sweat.     

Cultural practices of the Zulu ethnic group on the body and their influence on body donation

Cultural practices in the African continent have been thought to impact negatively on body donation. Thus, most African countries continue to rely on unclaimed bodies for dissection programs, or bequests from the white population. The latter situation is dominant in South African medical schools. Since South Africa is multi-cultural with nine main ethnic groups of the Black African population, it is important to seek the reasons behind lack of participation in body donation. This report represents a move in this direction with its qualitative study of the cultural practices of the Zulu ethnic group in the province of KwaZulu-Natal from the perspective of a variety of participants, with emphasis on their treatment of the human body after death. Four themes emerged from interviews: (1) Death is not the end; (2) Effect of belief in ancestors; (3) Significance of rituals and customs carried out on human tissue; and (4) Burial as the only method of body disposal. Each of these themes is discussed in relation to the likelihood of body donation being seen by Zulus as an acceptable practice. It is concluded that this is unlikely, on account of the need to preserve the linkage between the physical human body and the spirit of the deceased person, and the perceived ongoing relationship between the spirit of the dead and the living. In view of these conclusions, a number of options are canvassed about the manner in which anatomists in KwaZulu-Natal might obtain bodies for dissection. These possibilities have implications for anatomists working in comparable cultural contexts.     

A Look at the Anatomy Educator Job Market: Anatomists Remain in Short Supply

In 2002, a widely publicized report projected an anatomy educator shortage based on department chairpersons' perceptions. Now, 17 years later, the question lingers: “Does an anatomy educator shortage persist and, if so, how severe is the shortage?” Trends in the number, type, and fill rate of anatomy educator job openings were explored by analyzing job posting in the United States over the past two years. A survey was distributed to leaders of anatomy-related departments in the United States, Canada, and European Union. Most departmental leaders who responded (65% or more) from the United States/Canada (n = 81) and the European Union (n = 52) anticipate they will have “moderate” to “great” difficulty hiring anatomy educators in gross anatomy, histology, and embryology over the next five years. Within the United States, the number of anatomy educator job postings at medical schools more than doubled from at least 21 postings in 2017 to 52 postings in 2018. Twenty-one percent of postings between 2017 and 2018 were never filled. While the number of anatomy educator openings within the United States/Canada is perceived to remain in a steady state for the next five years, the European Union estimates a five-fold increase in the number of openings. Departmental leaders prioritize anatomy educator applicants who have teaching experience (mean ± SD = 4.64 ± 0.84 on five-point Likert scale), versatility in teaching multiple anatomy disciplines (3.93 ± 1.07), and flexibility in implementing various teaching pedagogies (3.69 ± 1.17). Collectively, these data suggest the shortage of anatomy educators continues in the United States/Canada and the European Union.     

On Some Mathematical Aspects of Magnetohydro-and Plasma-Dynamics

The author presents a review of some mathematical aspects of magnetohydrodynamics and plasma-dynamics, and the fields of mathematics required and used in those domains are briefly discussed. The last section is devoted to the discussion of adjusting the mathematical program of a university, from the point of view of engineering, physics and mathematics, so that a greater number of students in those disciplines will be prepared for graduate courses in magnetohydrodynamics and plasma-dynamics.