A sample of 83 adults with cerebral palsy was obtained from two ongoing studies (52 subjects from one study; 31 subjects from a second study). Inclusion and exclusion criteria were not reported. Outcome measures were the physical environment, caregiver attitude, and personal characteristics. The dependent variable was frequency of exercise. Physical environment was measured through a four-item scale that examined accessibility to exercise programs (alpha reliability 0.64); caregiver attitude was measured by a caregiver's perceived benefits measure (alpha reliability 0.61); personal characteristics were measured through the Inventory for Client and Agency Planning (product-moment correlations between 0.93 and 0.99). Frequency of exercise was measured by a modified version of the Physical Activity and Disability Survey (PADS) (inter-rater reliability = 0.83; test/retest reliability = 0.85; internal consistency = 0.78. Blocking was used to provide control for the independent variables.