The purpose of research is to ascertain the function of physical exercise in senior populations. Physical exercise has a significant role in the management of depression among the senior population. It is well-known that humans acquire two forms of memory: short-term memory and long-term memory. Accurate neuronal function is necessary for the establishment and maintenance of different memory kinds. The development of memory in the aged population is improved with appropriate physical activity when there is an improvement in the quantity and quality of neurons. These individuals are less likely to experience mental health problems like dementia. We are persuaded that physical exercise provides several advantages for the aged population by all of these implications of physical activity in controlling depression in the senior population. Depressive symptoms and disorders are widespread and burdensome in older adults, and they are important risk factors for severe chronic diseases, such as cardiovascular disease, chronic pain, cognitive and functional decline, and an increased risk of suicide and all-cause death. Over 5% to 10% of all infections in Europe are related to depression in terms of disability-adjusted life years. Depression is thought to have cost the US economy alone more than $210.5 billion. It remains a primary goal to identify possibly accessible and cheap lifestyle and health behaviours that may mitigate the risk factors for depressive disorders and symptoms, particularly in those with chronic diseases. Regular physical activity can prevent depression, as evidenced by recent meta-analytic research and earlier prospective cohort findings. In 111 prospective cohort studies involving over 3 million adults, physical activity exposure was associated with a 21% reduction in the odds of incident cases of depression or an increase in subclinical depressive symptoms in fully adjusted models.