Perceived Recreational-Space Barriers and Parental Physical Activity Support for Children with Disabilities: Parent Physical Activity as a Moderator of the Intention–Support Association

Background/Objectives: Parents play an important role in supporting physical activity among children with disabilities, but the environmental and behavioral factors associated with their support remain insufficiently understood. This study examined associations among perceived community recreational-space barriers, support intention, parent moderate-to-vigorous physical activity (MVPA), and reported parental physical activity support. Methods: This secondary analysis used cross-sectional survey data from U.S. parents of children with disabilities aged 5–11 years. Covariate-adjusted analyses included 108 parents. Observed composite-score regression models examined associations among perceived barriers, support intention, and parental support, with log-transformed parent MVPA moderating the intention–support association. Models adjusted for parent and child age, residential area, educational attainment, household income, and child disability category. Regression coefficients were evaluated using HC3 heteroscedasticity-consistent standard errors. Results: Perceived barriers were negatively associated with support intention (B = −0.141, p = 0.009). At mean parent MVPA, intention was positively associated with parental support (B = 0.406, p < 0.001). At mean intention, parent MVPA was also positively associated with support (B = 0.213, p = 0.002). The intention × MVPA interaction was negative (B = −0.197, p = 0.031; ΔR2 = 0.048), indicating a weaker intention–support association at higher MVPA. The adjusted outcome model explained 34.9% of the variance in parental support. Conclusions: Perceived recreational-space barriers were associated with lower support intention, while support intention and parent MVPA were conditionally associated with greater reported parental support. Longitudinal research is needed to clarify temporal ordering and inform family-centered physical activity promotion.