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Age Analysis of Cross-country Skiing Racers Who Participated in World Championship and Olympic Games in Years 1970-2007.\\
 JONÁKOVÁ, Šárka
This thesis is focused on evaluating age structure of cross-country skiing racers who participate in World Championship and Olympic Games. The work shall show if the age of sportsmen can be determined as one of the factors of success, what is the optimal age limit and how is this age limit changed in the course of time or if it stays the same. After studying available literature and after looking up certain data on the internet, the results were evaluated in Excel, the graphs were created and the final report was written. The results showed: the average age often oscillates among 24 and 36 years in the majority of disciplines, it has been rather decreasing mostly in the discipline od women - cross-countra skiing for 5 km both at the World Championship and at the Olympic Games. The age decreases at shorter distance and a little higher age increases or predominates at disciplines for longer distance. The total arithmetic mean of the age of the maximum performance is 27.99 years in cross-country skiing at World Championship and at winter Olympic Games from 1970 to 2007. The arithmetic mean of the age of winners in World Championship is 27.75 years. The arithmetic mean of the age of racers participated in winter Olympic Games is 28.33 years in that time. Average age of women is 27.78 years, average age of men is 28.19 years.
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