Physical activity moderates the effect of sedentary time on an older adult's physical independence

Background/objectives Moderate-to-vigorous physical activity (MVPA) and breaks in sedentary time (BST) have been proposed as viable solutions to improve an older adult's independence, whereas (ST) has associated with detrimental effects. We sought assess the joint effects of ST, BST, MVPA on independence adults determine whether what extent ST relationship is moderated by and/or BST. Design Cross-sectional. Setting Laboratory Exercise Health, Faculty Human Kinetics. Participants Older (≥65 years old) from national surveillance system Portugal (n = 821). Measurements Physical were assessed accelerometry. was using a 12-item composite function (CPF) questionnaire. Multiple linear regression used model outcomes. Results Higher related lower CPF score (β −0.01, p < 0.0001), higher better 0.02, 0.0001). BST not after accounting for 0.03, 0.074). had moderating effect (p where ≥36.30 min/day ameliorated significant inverse between CPF. Engaging ≥107.78 resulted having positive score. No moderation found > 0.05). Conclusion Regardless spent inversely However, be moderator such that engaging at least 36 may blunt negative ST. At high levels (≥108 min/day), some actually provide benefit ability maintain independence.