The thesis focuses on the comparison of the results of general
fitness tests of biath-letes at the transition between the
youth and junior categories in the prediction of the future
performance of athletes and their subsequent performance in
selected winter seasons, as a verification of the established
performance predictions. The thesis includes the
characteristics and history of biathlon and cross-country
skiing and the factors influencing overall performance. The
main aim of the thesis is to de-termine, according to the
results of physical tests, a prediction of future perfor-mance
for individual athletes and to verify it using race results.