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Background: Globally, populations are ageing. Typically, physical activity levels decline and health worsens as we age; however, estimates of the impact of physical inactivity for population health often fail to specifically focus on older adults. Methods: Multiple databases were searched for systematic reviews and/or meta-analyses of longitudinal observational studies, investigating the relationship between physical activity and any physical or mental health outcome in adults aged ≥60 years. Quality of included reviews was assessed using AMSTAR. Results: Twenty-four systematic reviews and meta-analyses were included. The majority of reviews were of moderate or high methodological quality. Physically active older adults (≥60 years) are at a reduced risk of all-cause and cardiovascular mortality, breast and prostate cancer, fractures, recurrent falls, ADL disability and functional limitation and cognitive decline, dementia, Alzheimer's disease, and depression. They also experience healthier ageing trajectories, better quality of life and improved cognitive functioning. Conclusion: This review of reviews provides a comprehensive and systematic overview of epidemiological evidence from previously conducted research to assess the associations of physical activity with physical and mental health outcomes in older adults.

Background The COVID-19 pandemic has impacted communities across the world. Government responses, of promoting ‘social distancing’ at a population level, and ‘self-isolation’ of older adults to mitigate its spread have been unprecedented. Despite the importance of these Public Health and Social Measures (PHSM), they present challenges to maintaining a physically active lifestyle, particularly for older adults. Context The importance of physical activity (PA) for health is well documented. There is strong evidence that PA in later life reduces the risk of disease, helps to manage existing conditions, and develops and maintains physical and mental function. Staying physically active is particularly important for older adults currently. Implications and recommendations Research suggests that PHSM have already reduced levels of PA for older adults during the COVID-19 pandemic. Prior to COVID-19 many older adults were not engaging in enough PA to attain health benefits. Evidence indicates that there will be an increase in the number of older adults not meeting guidelines for PA due to the impacts of COVID-19. This has implications for population health and public health policy. How to support older adults to remain physically active during and after the COVID-19 crisis will require careful consideration. Going forward it is imperative that policy and practice support all older adults to achieve the recommended levels of PA to ensure that they are not disadvantaged in the short- but also in the longer term by the impact of COVID-19.