Diet regime is characterised by the consumption of vegetables, fruits, legumes, fish, nuts and olive oil, in addition to being low in saturated fats and wealthy in antioxidants. Alfonso [63] denominated this diet as the mixture of foods developed by neighborhood agriculture, in line with local recipes and standard cooking approaches characteristic of each geographical area. However, additionally, it incorporates normal engagement in physical activity, alongside a healthier and respectful strategy for the environment [64]. Another conditioning element will be the exponential boost in physical inactivity. This can be concern has develop into so big that the WHO [65] has denominated it a general challenge to public well being. Authors including Macek et al. [66] have established minimum physical activity recommendations for children aged amongst 6 y and 17 y. These recommendations are as follows: engage in moderate-to-vigorous aerobic physical activity for more than 60 min each day; engage in vigorous aerobic physical activity in the least 3 instances a week; engage in muscle strengthening activity a minimum of three times a week. Likewise, Llamazares [67] indicated the principle motives for engaging in physical activity at these ages. These motives involve benefitsChildren 2021, eight,3 ofin the educational setting, healthier habits normally, the promotion of social relationships and the obtainment of pleasure and enjoyment. In this way, given the numerous analysis studies which have concisely associated the aforementioned variables, the primary objective of the present study was to establish the relationships in between physical self-concept, physical activity engagement and Mediterranean diet adherence inside a sample of adolescents undertaking secondary college education. According to this objective, the following three hypotheses were proposed:Physical activity might be positively related to physical self-concept; Adolescents reporting poorer diet regime high-quality will have a decrease physical self-concept; Physical self-concept will probably be strongly influenced by its dimensions, the practice of physical activity plus the quality on the diet plan.2. Materials and Strategies 2.1. Subjects and Design and style The present study was nonexperimental, quantitative, descriptive xploratory, crosssectional and ex post facto in nature. Measurements were taken from a single group. The study population with the present sample constituted all secondary college students enrolled at state-funded institutions inside the province of Mifamurtide Biological Activity Granada during the 2019/2020 Chiglitazar custom synthesis academic year. According to the Statistical and Cartographic Unit housed within the Ministry of Education and Sport with the Regional Government of Andalusia (Spain) (2020), students enrolled inside the aforementioned general course of education in the province of Granada totalled 53,198 general. In line together with the criteria established by Otzen [68], all adolescents who agreed to participate and met certain inclusion criteria have been considered as a part of the study population. Inclusion criteria have been as follows: (a) be enrolled in state-funded secondary education throughout the 2019/2020 academic year; (b) be aged among 11 y and 20 y; (c) give signed informed consent for the handling of information pertaining to minors, exactly where relevant. Likewise, exclusion criteria were established with the aim of obtaining a trusted sample. These were as follows: (a) suffering from any sort of pathology or situation that would impede the right completion in the questionnaire; (b) returning incomplete questionnaires or responses that could build confusion (re.