[Purpose] We sought to examine the relationship between lifestyle behavior and physical
fitness in middle-aged and elderly laborers. [Subjects] In total, 2,469 male laborers
between 45 and 64 years of age residing in eight cities in South Korea were studied
between January and December 2007. [Methods] Age, height, and weight were evaluated as
general characteristics. Lifestyle behavior items included exercise, dietary habits,
smoking, drinking, and sleeping hours. Physical fitness was assessed by measuring muscle
strength, muscle endurance, flexibility, reflexes, and agility. [Results] In terms of
physical fitness status, all items except handgrip strength showed significant changes
according to exercise frequency. Dietary habits were associated with significant
differences in the Sargent jump and whole-body reaction time between groups. Smoking and
drinking were associated with significant differences in sit-ups between subgroups.
Sleeping hours demonstrated significant differences in the Sargent jump and whole-body
reaction time between groups. [Conclusion] Although there were differences according to
physical fitness status, exercise frequency, dietary habits, smoking, drinking, and
sleeping hours showed significant associations with physical fitness. Thus, healthy
lifestyle behaviors, such as regular exercise, regular dietary habits, not smoking,
moderate drinking, and adequate sleep, are important for physical fitness management and
work capacity improvement in middle-aged and elderly laborers.