Özet:

This study was carried out with the aim of studying some body compositions of the one-year training period and the impact on VO2 MAX values; the average age of 17, 58 years, the average size of 170, 16 cm, the average body weight of 61, 00 kg, the average age of 16, 00 years, the average size of 161, 40 cm, the average body weight of 56, 94 kg, the elite level athletes participated as volunteers, including a total of 17 in the skiing industry. The participants, respectively; the size, body weight, body composition measurements and cardiopulmonary exercise tests were applied. Statistical analysis of the data obtained was carried out on the personal computer in the SPSS 21.00 package program. The data obtained during the measurement is recorded immediately. In all data, the arithmetic average and standard deviations are calculated. The comparative analysis of the pre- and final test values of the research group was made by the Paired Samples t test method from the parametric tests and the significance level was established as p<0,05. The statistical analysis found that male participants had a significant difference in body weight, fat-free mass, VO2 max in the anaerobic edge, pulse in the respiratory edge, VO2 in the respiratory edge and running speed in the respiratory edge parameters, while female athletes had a significant difference in the prior and final test values of fat-free mass, maximum pulse, anaerobic edge pulse and VO2 parameters in the anaerobic edge (p<0,01, p<0,05) As a result: The one-year training period applied to elite-level skiing athletes has been found to cause positive changes in some body compositions, while some VO2 MAX values have been found to cause positive and negative changes. It is believed that the coaches consider these changes when preparing their work plans as important in terms of sports performance. The effect of one-year training period on some body compositions and VO2 MAX VALUES OF ELITE CROSS-COUNTRY SKIERS ABSTRACT In this study where the aim is to investigate the effect of a one-year training period on some body compositions and VO2 MAX values of elite cross-country skiers; a total of 17 elite cross-country skiers, 12 males whose average age was 17,58 years, average height was 170,16 cm, average bodyweight was 61,00 kg, 5 females whose average age was 16,00 years, average height was 161,40 cm, average bodyweight was 56,94 kg participated voluntarily. Participants were subject to height, bodyweight, body composition measurements and cardiopulmonary exercise test, respectively. The statistical analysis of the obtained data was done on a personal computer using the package program SPSS 21.00. The data obtained during the measurements were recorded immediately. Arithmetic means and standard deviations of all data were calculated. The comparative analyses of the pretest and posttest values of the research group were done with Paired Samples t-test method and the significance level was found to be p<0,05. According to the results of the conducted statistical analysis, it was seen that there is a significant difference (p<0,01, p<0,05) between the pretest and posttest values of the males' bodyweight, lean body mass, VO2 max on anaerobic threshold, pulse on the ventilatory threshold, VO2 on ventilatory threshold, and running speed on ventilatory threshold parameters; females' lean body mass, maximum pulse, anaerobic threshold pulse, and VO2 on anaerobic threshold parameters. As a result: It was found that the one-year training period of the elite cross-country skiers resulted in a positive change in some body compositions but caused positive and negative changes in some VO2 MAX values. It is considered to be important that in terms of sports performance, the trainers should take these changes into consideration when they are preparing their training plans.   Keywords: Cross-country skier, Body composition, VO2 MAX