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Kerry McGawley Coline Van Waerbeke Karl-Johan Westberg Erik P.Andersson 《运动与健康科学(英文)》2022,11(1):21-29
Background:In a sprint cross-country(XC)ski competition,the difference in recovery times separating the first and the second semi-final(SF)heats from the final(F)may affect performance.The aim of the current study was to compare the effects of longer vs.shorter recovery periods prescribed between the 3 knock-out races of a simulated sprint XC ski competition involving a prologue(P),quarter-final(QF),SF,and F.Methods:Eleven well-trained XC ski athletes completed 2 simulated sprint XC ski competitions on a treadmill involving 4×883-m roller-ski bouts at a 4°incline using the gear 3 ski-skating sub-technique.The first 3 bouts were completed at a fixed speed(PFIX,QFFIX,and SFFIX)corresponding to~96%of each individual’s previously determined maximal effort.The final bout was performed as a self-paced sprint time trial(FSTT).Test conditions differed by the time durations prescribed between the QFFIX,SFFIX,and FSTT,which simulated real-world XC ski competition conditions using maximum(MAX-REC)or minimum(MIN-REC)recovery periods.Results:The FSTT was completed 5.4±5.5 s faster(p=0.009)during MAX-REC(179.2±18.1 s)compared to MIN-REC(184.6±20.0 s),and this was linked to a significantly higher power output(p=0.010)and total metabolic rate(p=0.009).The pre FSTT blood lactate(BLa)concentration was significantly lower during MAX-REC compared to MIN-REC(2.5±0.8 mmol/L vs.3.6±1.6 mmol/L,respectively;p=0.027),and the pre-to-post FSTT increase in BLa was greater(8.8±2.1 mmol/L vs.7.1±2.3 mmol/L,respectively;p=0.024).No other differences for MAX-REC vs.MIN-REC reached significance(p>0.05).Conclusion:Performance in a group of well-trained XC skiers is negatively affected when recovery times between sprint heats are minimized which,in competition conditions,would occur when selecting the last QF heat.This result is combined with a higher pre-race BLa concentration and a reduced rise in BLa concentration under shorter recovery conditions.These findings may help inform decision making when XC skiers are faced with selecting a QF heat within a sprint competition. 相似文献
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Johannes Westberg 《History of education》2015,44(4):415-436
The emergence of mass schooling is undoubtedly one of the most significant transformations that took place during the eighteenth and nineteenth centuries. This article takes a new approach to this fundamental issue by analysing the historical conditions required for the construction of school buildings and the advent of mass schooling, in the 1840–1900 period. Using the school building process as a point of departure, the growth of schooling is tied not only to well-known factors such as industrialisation, state formation processes and the decentralisation of school systems, but also to the expansion of the market economy, modernisation of the credit market, liberalisation of the real property market, changes in local tax systems, and the expansion of the building materials market. Thus, a broader and largely novel explanation of the emergence of mass schooling is accomplished. 相似文献
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Johannes Westberg 《History of education》2019,48(1):19-40
Drawing inspiration from the new social history of livelihood, this article examines how rural nineteenth-century teachers made a living by engaging in livelihood diversification. By using a wide variety of source materials from nineteenth-century Sweden, this article shows that, far from specialising exclusively in teaching, teachers were often engaged in multiple occupations as late as the year 1900, and that teachers’ work ranged from activities that were encouraged to those that were frowned upon or even illegal. As a result, this article sheds new light on teaching as an occupation in the nineteenth century and contributes to the discussion of the social and economic positions of teachers. By investigating how teachers earned their livelihoods, this article also addresses the role of teachers’ multiple occupations in the expansion of mass schooling during the nineteenth century. 相似文献
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Johannes Westberg Ayhan İncirci Merja Paksuniemi Tuija Turunen 《Journal of educational administration and history》2018,50(3):133-144
This article addresses the role of the state and state formation in the establishment of national education during the nineteenth century and early twentieth century. Through a comparative case analysis of two countries at the European periphery (Finland and Turkey), this article shows how national educational systems, in both instances, were driven by periods of intense state building. In the nineteenth century, military defeats sparked educational reforms, and in the early nineteenth century school laws were enacted due to the establishment of the republics of Finland and Turkey. Nevertheless, these examples also show the limits of a state formation perspective. Despite changes in educational policy, neither state reached high enrolment levels in the nineteenth century, and only in Finland schooling for all was realised in the 1930s. Thus, this work encourages further comparative analyses of the social, economic and political circumstances in which these states acted. 相似文献
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Katrin Häggström Westberg Marie Wilhsson Petra Svedberg Jens M. Nygren Antony Morgan Maria Nyholm 《Child development》2019,90(3):970-984
This study aims to understand the role that optimism could play in the context of a health asset approach to promote adolescent health-related quality of life (HRQOL). Adolescents (n = 948), between 11 and 16 years old from a medium-sized rural town in Sweden, answered questionnaires measuring optimism, pessimism, and HRQOL. The findings indicate a significant decrease in optimism and a significant increase in pessimism between early and midadolescence. The study has allowed us to present associational evidence of the links between optimism and HRQOL. This infers the potential of an optimistic orientation about the future to function as a health asset during adolescence and by implication may provide additional intervention tool in the planning of health promotion strategies. 相似文献
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Johannes Westberg 《History of education》2013,42(4):465-479
What significance did donations, bequests, tuition fees and fund‐raising events have for early care and education programmes during the nineteenth and early twentieth century? Through an examination of 24 Swedish infant schools, day nurseries and free kindergartens, this article verifies that donations and bequests were essential for the economy of these programmes. Revenues from fundraisers were, however, not as important as previous research suggests. Balls, concerts and coffee parties were arranged quite frequently, but their function was to create publicity rather than to raise revenues. Instead, fees and interest revenues played a larger part in the economy of these programmes than previous research has suggested. Thus, this article raises a series of questions regarding the funding of such programmes, national differences in this respect and the development of fund‐raising strategies over time, opening up the field for further studies in this area of research. 相似文献
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