Regular physical activity is universally recognized as a cornerstone of good health. Substantial evidence shows
that an active lifestyle lowers the risk of major non-communicable diseases and improves mental well-being
and overall quality of life. Despite these well-established benefits, physical inactivity remains a pervasive global
problem; approximately one in three adults and four in five adolescents fail to meet recommended physical
activity levels. Increasing attention focuses on 24-hour movement behaviors, an integrated concept that
encompasses physical activity, sedentary behavior, and sleep across a full day. Rather than addressing these
behaviors in isolation, recent guidelines advocate a whole-day approach, recognizing that activity, inactivity,
and sleep collectively impact health. Evidence shows a clear dose–response relationship, as adhering to
recommendations for all three behaviors yields greater health benefits than meeting only one or two. The
24-hour movement framework represents a global shift toward integrated health guidelines that emphasize
physical activity, reduced sedentary time, and adequate sleep. In response to high inactivity and sedentary
rates, Korea has aligned with this approach through its updated national guidelines. However, translating these
recommendations into action requires cultural changes, supportive environments, and multilevel strategies.
Future research should investigate how socioeconomic and cultural factors influence adherence to 24-hour
movement guidelines in Korea and explore the effectiveness of integrated interventions targeting multiple
behaviors simultaneously. Embracing and adapting the 24-hour approach is essential for advancing public
health in Korea.