Individuals aged 18-25 exhibited a gradual increase in gym visits throughout the 1980s, culminating in a substantial surge between 1994 and 2003, ultimately achieving the highest participation rates among all age groups. The 26-45 cohort mirrored a similar trajectory, experiencing a period of slight fluctuations before a significant upturn in gym attendance post-1994.

Conversely, the 46-65 age group, after a modest initial rise in gym participation, encountered a sharp decline following 1989. This stands in stark contrast to the under-45 demographics, who consistently demonstrated a growing interest in gym activities.

Finally, while gym attendance among individuals over 65 remained relatively low throughout the initial period, a steady upward trend became evident after 1992. This suggests a gradual shift in lifestyle choices and an increasing emphasis on physical well-being within this demographic