Methodological principles of studying the philosophical and legal foundations of physical culture and sports in the context of the development of fitness as a socio-cultural phenomenon

This article explores fitness as a multifaceted sociocultural phenomenon of the 21st century that has moved beyond the traditional understanding of physical activity and become an integral part of global culture. The author examines fitness not only as a means of maintaining physical form but also as a symbol of health, beauty, social status, self-realization, and personal expression in the context of postmodern society. Fitness is analyzed through philosophical categories such as corporeality, beauty, strength, discipline, and harmony, and in relation to social changes driven by urbanization, media development, commercialization of body culture, and the increasing role of digital technologies. The purpose of the study is to substantiate the methodological foundations for analyzing the philosophical and legal principles of physical culture and sports, considering fitness as a cultural phenomenon of modernity. Particular attention is given to the methodology of an interdisciplinary approach, integrating hermeneutic, phenomenological, and critical perspectives on the body, as well as sociology and philosophy of sport. The authors refers to key academic sources, including works by R. Sassatelli, N. M. Petrzela, and A. Sekot, which represent contemporary approaches to the study of fitness as a global phenomenon. The article highlights the historical transformations of fitness from body training in ancient times to the modern fitness club industry and emphasizes its role in shaping new personality types: mobile, responsible, adaptable, and self-developing individuals. In the legal dimension, the study analyzes regulatory frameworks for the fitness industry, including anti-doping compliance, the legal status of personal trainers, and the protection of clients’ personal data in fitness clubs. The article argues for the expansion of legal frameworks, taking into account ethical standards and the challenges posed by the popularization of fitness in the digital age. The article concludes that fitness in the 21st century is not only a tool for physical improvement but also a powerful channel of sociocultural communication, requiring comprehensive philosophical and legal reflection. The scientific understanding of fitness contributes to the enhancement of professional training for specialists in the field of physical culture and increases their ability to critically analyze emerging trends in health, sports, and culture.