Piloting Home-based Movement-to-Music Among Adolescents With Cerebral Palsy: A Randomized Controlled Trial

Participation in home, extracurricular, and community activities measured via the Children's Assessment of Participation and Enjoyment (CAPE). The CAPE is used to document changes in everyday activities outside of the school-setting. The CAPE provides 3 levels of scoring: 1) overall participation scores; 2) domain scores that reflect participation in formal and informal activities; and 3) scores that reflect participation in 5 types of activity (active, physical, recreation, social, skill-based, and self-improvement activities).

Exercise self-efficacy will be measured with the Exercise Self-Efficacy Scale (ESES). The ESES includes 8 items that assess an individual's perceived confidence in the ability to perform more than 40 min of moderate-intensity physical activity three times per week. The ESES is rated on a scale ranging from 0 (Not at all confident) to 100 (Completely confident). The scores are summed into a composite score that ranges between 0 and 100, where a higher score is indicative of a greater perceived level of confidence to participate in physical activity.

The EGS contains 10-items related to how an individual sets goals and plans exercise activities. Questions for each of the 2 subcategories (goal setting and planning) are scored on a 5-point scale ranging from 1 (does not describe) to 5 (describes completely). A higher score for the goal-setting subcategory reflects a greater skillset for setting and achieving goals. A higher score in the planning subcategory reflects a greater perceived ability to schedule exercise within the person's lifestyle.

Social support will be measured by the Physical Activity Climate Questionnaire (PACQ), which was modified from a 12-item version of the questionnaire that demonstrated discriminant and convergent validity to assess physical activity climate among youth. The PACQ is a 15-item child-report measure of the perceived motivational 'climate' or autonomous support provided by the caregiver with regard to physical activity participation. Due to the nature of the questions, participants will be instructed to complete the PACQ without parental assistance. Questions are scored on a 7-point likert scale ranging from 1 (strongly disagree) to 7 (strongly agree). Higher average scores reflect a higher level of child-perceptions of autonomous support for physical activity behavior.

Outcome expectations will be measured by the Multidimensional Outcomes Expectations for Exercise Scale (MOEES). The MOEES contains 15-items that assess three domains of outcome expectations, namely, physical, social, and self-evaluative outcome expectations. Questions are scored on a 5-point likert scale ranging from 1 (strongly disagree) to 5 (strongly agree) and totaled for each outcome expectation category.

Adherence is defined as the number of movement-to-music video minutes completed throughout the program. The video minutes are objectively recorded via YouTube analytics. Participant's baseline characteristics will be regressed on video minutes, to explain who the program worked for.

Perceived pain will be measured via the National Institutes of Health Neuro-QoL Pediatric Pain short form.

Perceived fatigue will be measured via the the National Institutes of Health Neuro-QoL Pediatric Fatigue short form.