This systematic review examines the physical activity (PA) levels of older adults and their compliance with current PA guidelines. The review includes 53 studies published since 2000, focusing on non-institutional older adults aged 60 years and over. The percentage of older adults meeting recommended PA levels ranged from 2.4% to 83.0%. Definitions and measurement approaches varied across studies, posing methodological challenges. Older age groups and women were less likely to be regularly active. The review highlights the need for representative, randomized samples and consistent measurement methods to enable comparisons over time and between countries. The findings underscore the importance of PA in maintaining health and quality of life in older adults.This systematic review examines the physical activity (PA) levels of older adults and their compliance with current PA guidelines. The review includes 53 studies published since 2000, focusing on non-institutional older adults aged 60 years and over. The percentage of older adults meeting recommended PA levels ranged from 2.4% to 83.0%. Definitions and measurement approaches varied across studies, posing methodological challenges. Older age groups and women were less likely to be regularly active. The review highlights the need for representative, randomized samples and consistent measurement methods to enable comparisons over time and between countries. The findings underscore the importance of PA in maintaining health and quality of life in older adults.