Demographic ageing is defined by the increase in the proportion of elderly people in the total population. This demographic context highlights the need to create specific policies and actions to meet the demands of this growing population. The aim of this study is to review the existing literature on the use of physical activity to promote health and quality of life in the elderly. However, to understand the recurring physiological changes of the ageing process and the benefits of physical activity for improving the quality of life of the population in question. Therefore, this study is justified by the need to encourage physical activity among the elderly population, with the aim of minimizing the negative impacts of sedentary lifestyles and promoting healthy and active ageing. This article is a literature review with a qualitative approach. This study analyzed 20 articles, the findings of which indicate that physical activity is an important tool for promoting health and improving quality of life among the elderly. Based on the theoretical foundation, the benefits of practicing physical activities in improving basic daily activities were discussed, as well as their relationship with physiological changes. Evidence shows that regular physical exercise can mitigate the effects of loss of muscle mass and the risk of chronic diseases, as well as improving functional independence and mental well-being. In view of this, the promotion of physical activity should be a priority in public policy, with concrete incentives and an integrated approach among health professionals. It can be concluded that including physical exercise in everyday life not only prevents disease, but also contributes to healthier and more active ageing.