Happier Elderly Residents The positive impact of physical activity on objective and subjective health condition of elderly people in nursing homes. Evidence from a multi-site randomized controlled trial. We explore the effects of adapted physical exercise programs in nursing homes, in which some residents suffer from dementia and/or physical limitations and other do not. We use data from 452 participants followed over 12 months in 32 retirement homes in four European countries. Using a difference-in-difference with individual random effects model, we show that the program has exerted a significant impact on the number of falls and the self-declared health and health-related quality of life of residents (EQ-5D). The wide scope of this study, in terms of sites, countries, and measured outcomes, brings generality to previously existing evidence. A simple computation, in the case of France, suggests that such programs are highly cost-efficient.