Vitamin D, calcium, and iron are micronutrients crucial for bone health. However, their effect has been studied primarily in the cortical bone, with vitamin D status being assessed mainly from the total 25(OH)D serum fraction. The study aimed to investigate the impact of vitamin D (total and free fraction) and iron status (i.e., serum ferritin or soluble transferrin receptor) and calcium intake (ADOS-Ca questionnaire) on lumbar cortical and trabecular bone. In a cohort of 113 male subjects (76 athletes, 37 non-athletes) aged 15–19, the lumbar spine status (Z-score, bone mineral apparent density (BMAD), and trabecular bone score (TBS)) was determined using dual-energy X-ray absorptiometry (DXA). Relationships between the examined micronutrients and bone health parameters were observed only in athletes. Free 25(OH)D was significantly (p < 0.001) correlated with Z-score and BMAD, while total 25(OH)D (p < 0.001) and iron status (ferritin, Fe stores; p < 0.01) correlated solely with BMAD. Free 25(OH)D and ferritin concentrations were the best determinants of bone status (R² = 0.330; p < 0.001) and explained 25% and 7% of the BMAD variance, respectively. No relationships were found between the micronutrients and TBS. The results confirmed the positive influence of vitamin D and iron on cortical, but not trabecular, bone status solely in physically active subjects. In athletes, free 25(OH)D seems to be a superior indicator of bone health to a total 25(OH)D fraction.

Background and aim. The important role of sports psychology is often emphasized. But not everyone is aware that it applies to the entire area of physical culture. The aim of this article is to present the role of sports psychology and the positioning of this discipline in physical culture sciences. Matherial and method. The collected material consisted only of the works of sports psychologists available in Poland. The method of source materials analysis was used. Analysis with deductive reasoning and synthesis with inductive reasoning were used. Results. The importance of sport psychology for the sciences of physical culture and its theoretical and practical tasks are presented. Conclusions. Sport psychology is a discipline in the field of physical culture sciences. It deals with theoretical (research, education, diagnosis, analyzes, interventions, counseling) and practical (mental training) mechanisms and laws governing the psyche and human behavior in sport, physical education, tourism and recreation, rehabilitation and health training, using knowledge in the field of psychology and physical culture.

The aim of this study is to explain the higher incidence of subdural haematomas in elderly people compared to young adult. This research addresses the phenomenon by developing two distinct numerical models of the human head, simulating individuals people aged 77 and 28, respectively. These models are methodically constructed based on medical imaging data acquired through collaboration with hospitals and subsequently verified through empirical experimentation. Studies have shown that the main factor that influences the vulnerability to bridging vein rupture in older adults is the degenerative processes of nervous tissue. The most visible structural damage was observed in the outflow cuff segment. This phenomenon can be primarily attributed to specific geometric parameters associated with this anatomical region. The presented research emphasises the importance of computational models in understanding the pathomechanics of brain structures. As a result of the analyses, it was proven that the neurodegenerative processes of the brain that occur with age are crucial in understanding the higher incidence of subdural haematomas in elderly people.

The literature reports on the relationship of dairy product consumption with preferences, socio-economic characteristics, and physical activity. Little is known about buying behavior in the dairy market and its determinants, especially among older adults. The study aimed to evaluate the relationship between older adults' habitual purchase of dairy products and their liking, frequency of buying functional dairy products, physical activity, and selected socioeconomic characteristics. The cross-sectional pilot study was conducted between July and October 2024, among 310 people aged 60 and over in the Lower Silesia region of Poland. The survey collected data on the frequency of buying of dairy products (PF-DP scale), their preferences (P_DP scale), physical activity (IPAQ questionnaire), and socio-demographic and economic characteristics. The PCA analysis identified 3 patterns of buying behavior. The IPAQ procedure assessed physical activity levels in MET-minutes/week or minutes/week. The relationship between the identified buying behavior patterns and their determinants was verified using the Kruskal-Wallis test and Chi-square. It was found that high intensity of the “conventional dairy products and fats” pattern correlated with taste preferences, living with family (with or without a partner), high physical activity, including shuffling, sports, and recreational activities, and frequent purchase of different functional food groups. The financial situation described as “we live on average” was related to the high intensity of the “dairy fat” pattern and its moderate intensity to the high activity associated with movement. Only the high activity associated with housework was associated with a moderate increase in the “powdered milk, condensed and unfermented dairy drinks” pattern. With limited literature data and inconclusive survey results, evaluating the relationship, especially its causal nature, between the attitudes and buying behavior of the elderly in the dairy market, requires further research.

Head injuries remain one of the major health concerns in contact sports such as boxing. Despite the widespread use of protective gloves and helmets, their biomechanical effectiveness in mitigating head acceleration and reducing brain injury risk remains uncertain. This study aims to biomechanically assess available boxing equipment solutions and identify the brain–skull system’s response to physical forces from a boxing punch. A dedicated experimental setup was developed using mini triaxial accelerometers and a high-speed camera to measure head accelerations in a Primus unbreakable dummy. Tests were performed using gloves of different masses (0 oz, 10 oz, and 16 oz) and three head protection configurations: no helmet, rugby helmet, and boxing helmet. The resultant accelerations were analyzed and compared across test conditions. Peak wrist accelerations ranged from 195.00 to 271.77 m/s², while head accelerations did not exceed biomechanical injury thresholds. The boxing helmet, composed of multilayer polyurethane foam, did not consistently decrease acceleration; in some cases, it produced higher overloads due to increased head mass and moment of inertia. A rugby helmet made of open-cell EVA (ethylene vinyl acetate) foam with lower density exhibited more favorable energy-dissipation characteristics under low-impact conditions. Glove mass also influenced acceleration differently between male and female participants, likely due to variations in punch velocity and force generation. This work is a pilot study using two trained adult volunteers to validate the combined IMU–video measurement framework. The results serve as hypothesis-generating mechanistic observations rather than population-level effect estimates. Protective effectiveness in boxing depends on a complex interaction between material properties, geometry, and user biomechanics. Optimal equipment design should balance energy absorption and mass to minimize both linear and rotational accelerations. Future studies should integrate advanced material modeling and finite element simulations to support the development of adaptive, lightweight protective systems.

Background: Dairy products contain many nutrients that are important for the human body, as they serve to maintain its physiological functions and protect against many diseases. Their consumption by older adults, however, raises certain doubts, including the risks of lactase deficiency, milk protein allergy, etc. Functional dairy products can help maintain or increase the consumption of dairy products among the elderly. This study aimed to evaluate the relationship between older adults’ habitual purchases of dairy products and their taste preferences and frequency of buying functional dairy products, physical activity, and selected socioeconomic characteristics. Materials and methods: This study was conducted between July and October 2024, among 310 people aged 60 and over in Poland. The study collected data on the frequency of buying dairy products (the PF-DP scale), preferences (the P_DP scale), physical activity (the IPAQ questionnaire), and socio-demographic and economic characteristics. The PCA identified three patterns of buying behavior. The relationship between the identified buying behavior patterns and their determinants was verified using the Kruskal–Wallis test and Chi-square. Results: It was found that high intensity of the “conventional dairy products and fats” pattern correlated with high taste preferences (Me = 8.0; p < 0.05), living with family regardless of whether with or without a partner (11.8% and 15.8%; p = 0.002), high physical activity (MET = 5975.5; p = 0.004), including movement (MET = 1803.0; p = 0.028), sports and recreational activities (MET = 1908.0, p = 0.017), and frequent purchases of different functional food groups. The financial situation described as “we have an average standard of living” was related to the high intensity of the “dairy fat” pattern (62.3%; p = 0.018) and its moderate intensity to the high activity associated with movement (MET = 1788.0; p = 0.004). More than half of the sample never purchased functional dairy products. A high intensity of the “conventional dairy products and fats” pattern was associated with more frequent purchases of functional products compared to other patterns. Conclusions: The higher physical activity of older people was accompanied by a higher intensity of the “conventional dairy products and fats” pattern and more frequent purchases of functional dairy products. An evaluation of the relationships between the determinants and buying behaviors of older people in the dairy market, especially their causal nature, requires further research.