SOUTHERN JOURNAL OF SCIENCES

Background: Nutrition strategies may influence marathon performance and runners’ subjective experience. Aims: To evaluate the association between dietary habits, supplement use, performance, and subjective experience in runners of the 2025 Mendoza International Marathon. Methods: A survey of 240 runners from the 2025 Mendoza International Marathon examined dietary habits, supplement use, performance, and subjective experience. Results: Nutritional counseling was linked to more favorable perceptions. Conversely, pre-race alcohol and excessive carbohydrates with poor hydration increased gastrointestinal complaints. Supplements showed no measurable performance or well-being benefits. Discussions: These findings suggest that pre-race nutritional behaviors may have a greater influence on runners’ subjective experience than supplement use.Conclusions: Nutritional guidance may improve race experience, whereas poor pre-race practices increase gastrointestinal complaints.

Background: General San Martín Park, located in Mendoza, Argentina, is the city's most emblematic green infrastructure, designed in 1896 by architect Carlos Thays. The park plays a critical role in microclimate regulation, water conservation, and public health resilience. Aim: The purpose of this study was to assess the quality of the water used for irrigation in the most important park of the city of Mendoza, the General San Martín Park, through a comprehensive series of analyses. Methods: This study assessed the physicochemical and biological quality of irrigation water in the park, focusing on parameters such as temperature, pH, turbidity, electrical conductivity, hardness, alkalinity, nitrates, sulfates, and anthropogenic contaminants. Samples were collected at 20 points across the irrigation network during three periods (October 2024, April 2025, October 2025). Results: Indicate that irrigation water is generally of good quality, suitable for sustaining the park's forest mass. pH values remained within the optimal irrigation range (6.5–8.4), while nitrate levels were consistently below the 30 ppm threshold, with no nitrites detected. Hardness and alkalinity varied spatially, particularly near the Alto Godoy Water Treatment Plant, suggesting localized inputs of dissolved solids. Turbidity and conductivity strongly correlated with hardness, reflecting the influence of suspended and dissolved mineral content from runoff and seasonal hydrological dynamics of the Mendoza River. Importantly, we found no evidence of toxic anthropogenic contaminants such as heavy metals, cyanides, or petroleum derivatives. Discussion: Overall, the findings emphasize the need for continuous monitoring. From a management perspective. These results establish a baseline of water quality indicators for the park. They provide essential input for long-term strategies in conservation, recreation, and environmental education, ensuring resilience against water scarcity and urban expansion. The study underscores the park's role as both a cultural heritage site and a living laboratory for sustainable urban ecology.

Background: Transgender and gender-diverse individuals experience health inequities that may increase cardiometabolic risk. Gender-affirming hormone therapy has been associated with changes in body composition, lipid metabolism, and cardiovascular risk markers. However, limited evidence is available regarding dietary habits and cardiovascular risk profiles in transgender populations in Latin America. Objective: To evaluate cardiovascular risk factors and cardioprotective food consumption among transgender adults receiving gender-affirming hormone therapy. Methods: A quantitative, observational, descriptive, and cross-sectional study was conducted in transgender adults undergoing gender-affirming hormone therapy in Mendoza, Argentina. Eighty-seven participants completed surveys regarding sociodemographic characteristics, lifestyle habits, nutritional counseling, and consumption of cardioprotective foods. We assessed anthropometric indicators and biochemical parameters related to cardiovascular risk. Statistical analyses were performed using GraphPad Prism 8. Data were analyzed using Spearman correlation, the chi-square test, and the Mann-Whitney U test. Results: A high prevalence of modifiable cardiovascular risk factors was identified, including overweight, sedentary behavior, smoking, and low intake of cardioprotective foods. More than half of the participants had never received nutritional counseling. No statistically significant differences were observed between transgender women and transgender men in the evaluated anthropometric and biochemical variables. Nevertheless, significant correlations were identified between body mass index, waist circumference, waist-to-height ratio, and atherogenic lipid markers. Dietary quality showed limited associations with cardiovascular risk indicators, although higher dietary quality was positively associated with HDL cholesterol levels in transgender men. Conclusion: The study highlights the presence of multiple cardiovascular risk factors in transgender individuals receiving gender-affirming hormone therapy and emphasizes the importance of integrating nutritional assessment and cardiometabolic monitoring into comprehensive transgender healthcare. These findings support the need for inclusive nutritional interventions and longitudinal studies addressing cardiovascular health in transgender populations.