This study determined the energy expenditure of 60 professional Ukrainian futsal players with different positional roles by taking into account their mass, composition, and body structure. To obtain the necessary data, was used a device that determines the number of calories expended and quantities of fat and muscle components in the body of each athlete. The data on the expenditure of energy was received during competitions and at training sessions during preparation for competitions. The data on the body composition as well as the use of anthropometry, somatoscopy, and the Heath-Carter scheme allowed to determine the types of body structure of the athletes. Professional futsal players have an ectomorphic type of body structure. During a futsal match, the most energy is expended by the defenders, and the expenditure of the pivots are insignificantly larger than those typical for the goalkeepers. During training, the defenders and pivots spend almost the same amount of energy, which is considerably more than that of the goalkeepers, regardless of the content of training programs. The obtained data can be used by trainers, nutritionists, and team doctors to offer players the best time to recover between workouts and provide them with an adequate diet. The results on the peculiarities of the energy expenditure of Ukrainian professional futsal players in different positional roles during preparation for competitions and during training sessions should be considered as a way to achieve better results in competitions. Specifically, these data can used by trainers, nutritionists, and team doctors to offer players the optimal recovery period between training sessions and provide them with an adequate daily eating ration. This approach will enhance preparation by players for competitions.