Theme: Adapted Physical Activity Over Life-SpanINTRODUCTION: Physical activity (PA) measurement among children with cerebral palsy (CP) has not been adequately established. CP involves a wide range of disabilities, and the assessment of PA in this population is of importance to the design and implementation of health, therapy, and physical education programs (Kim, 2009; Pirpiris & Graham, 2004). The purpose of this study is to examine the validity of MTI (Actigraph) as a PA measurement instrument for children with CP. METHODS: Participants included 31 children with CP (17 female and 14 male) aged 6 to14 years (M = 9.71 years, SD = 2.52 years). The participants were classified within Gross Motor Classification System (GMFCS) I to III, and took part in two activity sessions: (1) structured activity protocol with increasing intensities and (2) free play session. MTI was used to measure activity counts, heart rate was measured …postprin
