The effects of a 24-week exercise intervention and detraining on individuals with Intellectual and Developmental Disabilities

Abstract Objetive Regular physical exercise can promote physical fitness, reduce the risk of chronic diseases, increase independence and success in daily activities, and promote quality of life for individuals with intellectual and developmental disabilities (IDD). On the one hand, if this exercise practice is discontinued or interrupted, the associated beneficial effects can be lost. The aim of this study was to examine possible changes in body composition and physical and functional fitness variables after regular practice of a physical exercise program, as well as after the same period of detraining. Materials and Methods This study followed a quasi-experimental methodology of 6 months of physical exercise, followed by 6 months of interruption. The sample consisted of 10 individuals with IDD, with an average age of 43.2 years (SD=9.47). Weight, body mass index, handgrip, Timed Up and Go and Sit to Stand were assessed at initial intervention, post-intervention, and follow-up. Results Participants improved in all variables after the intervention program, but only significantly in the handgrip test (Bonferroni corrected: t=1.05; p=0.019; W=0.21). After 6 months without regular exercise, the participants showed a decline in physical and functional fitness variables, but only in handgrip significantly (p=0.044). Conclusions Although there are some gains from physical exercise program, there seems to be a loss of these gains after the end of the program. It is therefore recommended to avoid the period of detraining, which is fundamental to promoting the benefits of exercise, healthy ageing, independence, success in carrying out activities of daily living and quality of life.