Jacinto, MiguelAntunes, RaulMonteiro, DiogoRodrigues, FilipeAmaro, NunoCampos, Maria JoãoFerreira, José PedroMatos, Rui2024-09-162024-09-140736-5829http://hdl.handle.net/10400.8/10049Funding: This work was funded by National Funds by FCT—Foundation for Science and Technology: under project UIDB/04045/2020 (https://doi.org/10.54499/UIDB/04045/2020).This study investigated the effects of two physical exercise programs for adults with intellectual and developmental disabilities. Twenty-one participants were assigned to an indoor group (IG, n = 7; 24-week gym intervention with machine), an outdoor group (OG, n = 7; 24-week outdoor intervention with low-cost materials) or a control group. The outcomes assessed included quality of life, dementia, and functional capacity. The IG significantly improved physical well-being compared with the control group (p = .017). There were no significant differences in dementia score between groups and moments. Postintervention, the IG showed improvements compared with the control group for the 30-s sit-to-stand test (p = .03), timed up-and-go (p = .00), and 6-min-walk test (p = .033) and between moments in the IG for 30-s sit-to-stand test (pre ≠ post; p = .007) and 6-min-walk test (pre ≠ post; p = .007). Outdoor interventions appeared effective for physical well-being, while indoor interventions using weight-training machines benefited functional capacity. No significant effects were observed for dementia/cognitive decline.engcardiorespiratory trainingindoor trainingoutdoor trainingphysical fitnessresistance trainingjournal articlehttps://doi.org/10.1123/apaq.2024-00851543-2777