Background and Purpose: Morphological characteristics are of great importance for selection in most sports as well as in football. The aim of this study was to determine changes in morphological characteristics in HNK Vukovar 1991 players after the winter preparation period. Methods: Body height, body weight, thickness of skin folds in 4 areas were measured on a sample of 21 subjects aged 18 to 34, and morphological characteristics were analyzed by the bioelectrical impedance (BIA) method. Two measurements were performed, the first measurement took place at the beginning of the winter preparation period, and the second measurement at the end of the winter preparation period. The numerical results obtained were tested for distribution normality for which the Shapiro-Wilks test was used. Differences between variables were tested using the ANOVA Repeated Measures test. The data obtained in the study were processed using IBM Statistics SPSS 22 software. Statistical significance was established at p≤0.05. Results: The results showed that there was no statistically significant difference in the body weight of the players. Changes in body composition during the preparation period showed statistically significant differences in 8 variables: body fat percentage (MSD=1.08 %, p=0.001), muscle mass (MSD=1.02 %, p=0.001), lean body mass (MSD=0.73 kg, p=0.003), skeletal muscle mass (MSD=0.75 kg, p=0.000), total body water (MSD=0.90 %, p=0.000), extracellular body water (MSD=0.35) %, p=0.000), intracellular body water (MSD=0.352 %, p=0.000) and phase angle (MSD=0.17°, p=0.003). Statistically significant differences were observed in 2 of the 4 areas of skin fold thickness measurement: triceps skin fold (MSD=0.35 mm, p=0.022) and suprailiac skin fold (MSD=0.88 mm, p=0.002). In the remaining two areas (biceps skin fold, subscapular skin fold,) there was also a decreased value, but not statistically significant. Conclusion: Given the above, we can conclude that the given trainings during the winter preparation period had a positive effect on the morphological characteristics of the HNK Vukovar 1991 football players.