The research focuses on exergaming as an instrument of physical traning for stress tolerance. The purpose of the study is to determine the positive effect of exergaming on two criteria: 1) on stress resistance based on root mean square of successive differences (speed of recovery after physical stress); 2) to combat obesity on the basis of metabolic equivalent of task. The main difference between simple gamer and professional sportsman reaction to the exergaming was developed. For example, exergaming is one of the best types of unloading workout for sportsman and one of the best motivator for more intence workout for simple exergamer. The main categories of exergames classification were reviewed in economic and scientific context of the exergame industry. Main exergaming types include: home, medical, dance and bike exergaming, connect emulation of the sport, role-playing game with gamercize-control and outdoor mobile games. Materials and methods. Nineteen competitions of dance exergaming (World Pump Festival and Just Dance) and eSports League discipline of bike exergaming (Zwift) have been identified in aspects of cybersports. This article is confirmed in 2 experimental researches about: 1) metabolic equivalent of task in main exergaming types and outdoor mobile games in particular; 2) speed of recovery after physical stress. Study of metabolic equivalent of task for the exterior mobile games is based on Ukraine Niantic games community survey (190 members). Results and discussion. Average playing experience for the Niantic games (Ingress, Pokémon Go and Harry Potter: Wizards Unite) community was 4 years (59% ≤5 years and 41% >5 years). The distance travelled during this time was about 7429 kilometers (32% passed more than 10,000 km). Metabolic equivalent of task and body heat balance was modelled on the basis of the survey data and metabolic WHO constants and body heat constants of ANSI standart. Exterior games take 5.65 kkal to 1 kg per 1 day, home fitness exergaming (Power Pad, Let's Yoga, Personal Trainer: Walking) takes 7.14 kkal to 1 kg per 1 day, dance exergames take 7.14-10 kkal to 1 kg per 1 day. In the body heat equivalent, this is 4.1 times more than at rest for home-fitness videogames, 5.75 times more than at rest for dance exergaming and 1.84-2.59 times more than at rest for exterior mobile exergames. Conclusion. Based on the indicators of root mean square of successive differences with the help of Energy Health free platform, the first stage of the research on the influence of outdoor exergames on the formation of stress tolerance was held. Root mean square of successive differences monitoring was carried out for 20 participants (10 Black Sea State University volleyball team members and 10 Niantic game community members). An increase in root mean square of successive differences was recorded for 80% of gamers and 60% of athletes. Moreover, the novelty factor acted precisely in athletes, which indicates long-term effectiveness of outdoor mobile games as an instrument of physical traning for stress tolerance

This article examines the peculiarities of the formation of interparticle connections in porous products based on titanium powders using sponge titanium as an example, which are used in the aviation industry and airfield management. The developed model is based on the results of a previous study, where the structure of cuboctahedral and inverse cuboctahedral clusters of packing spherical powder particles was determined at the most dense packing. During the study, a model of the fusion of particles at the points of pressing deformation due to recrystallization under the influence of high temperatures in a vacuum was developed. 4 main stages of powder briquette sintering were considered, and a mathematical model was developed for each of them. Thus, the stage of liquid evaporation is considered from the viewpoint of the cavitation effect of boiling on the surface of particles and boiling of plasticizers. Euler's film boiling formula was used to describe the forces acting on the particle surface; Tolubinsky's formula was used for bubble boiling; convective heat exchange was considered part of the final stage of sintering. The stage of the formation of metallic bonds is modeled on the basis of the results of practical studies in the REV 5.5 furnace, recrystallization based on differential scanning colorimetry on the NETZSCH STA 449F1 Proteus device, and determining the change in grain size according to the E19 ASTM scales using the Jeffers method. The diffusion stage is modeled on the basis of the approximation of the particle deformation model in the contact zones at the pressing stage using the Frenkel formula. Linear shrinkage is modeled based on direct measurement of sample sizes before and after sintering. The developed model has a certain versatility when applied to simulate the interaction of particles of metal powders under the conditions of the formation of porous briquettes, especially if the shape of the particles is close to round or spongy. The obtained result will make it possible to more accurately evaluate such a factor as the adhesion between the particles of the pressing and predict the tensile strength of the material. Additionally, due to the mathematical characterization of the peculiarities of the formation of corpuscular porosity under the conditions of sintering in a vacuum, we can design materials with differentiated porosity, as well as lay the foundations for powder 3D printing of such materials, by assembling grain by grain, or layer by layer with the adjustment of the force of particle compression one into the other.