Alpine ski racing is one of the most popular sports in many countries; nevertheless, selection disadvantages and severe injuries result in high dropout rates. In this review we summarize existing knowledge about the specific challenges associated with selection bias and injuries, and their effects on talent development in ski racing.
The relative age effect (RAE) appears in all age categories of national Austrian and international alpine ski racing. Relatively younger athletes seem to only have a chance for selection if they are early maturing. Talent selection processes should consider both the biological maturity status as well as the relative age; additionally, a competition system based on a rotating cut-off date might contribute to a reduction of RAE. Youth and adolescent ski racers report lower injury rates compared to World Cup athletes. The knee was the most affected body part in relation to traumatic injuries. The most frequently reported overuse injuries were knee pain (youth) and low back pain (adolescent level). Athlete-related modifiable risk factors were core strength, neuromuscular control, leg extension strength and limb asymmetries. Based on these findings, prevention measures should be expanded to contribute to long-term injury prevention. In future research more multi-disciplinary, longitudinal studies should be performed. 相似文献
In this article, we describe briefly a number-theoretic problem first studied by Sierpiński, now known as theSierpiński problem. The problem remains open. 相似文献
AbstractThe link between sport and tourism is closely related in outdoor sports and it is worth considering the development of these physical activities in conjunction with the tourist infrastructures that facilitate access to the activity areas. The purpose of this paper is to reveal the major role played by the Touring Club de France (TCF) in the launching of winter sports in France through its promotion of tourist infrastructures and support of the related activities. The TCF played an innovating and most efficient part through its action on three essential aspects: equipping sites for tourists; developing the manufacture of winter sports equipment; and promoting winter sports, thus bringing new life to mountain resorts. In taking into account the crucial role of the TCF in this study, the main sources used are related to the club itself: its archives and the monthly review from 1908 to 1914. On a larger scale, an explanation on how the TCF acted as a lever to generate dynamics beneficial to local development of the mountain areas will also be provided. 相似文献