Validity of the OMNI rating of perceived exertion scale for children and adolescents with cerebral palsy.

Aim: This study evaluated the validity of the OMNI Walk/Run Rating of Perceived Exertion (OMNI-RPE) scores with heart rate and oxygen consumption (VO₂) for children and adolescents with cerebral palsy (CP).

Method: Children and adolescents with CP, aged 6 to 18 years and Gross Motor Function Classification System (GMFCS) levels I to III completed a physical activity protocol with seven trials ranging in intensity from sedentary to moderate-to-vigorous. VO₂ and heart rate were recorded during the physical activity trials using a portable indirect calorimeter and heart rate monitor.

Measuring reliability and validity of the ActiGraph GT3X accelerometer for children with cerebral palsy: a feasibility study.

Purpose: The purposes of this study were to: 1) establish inter-instrument reliability between left and right hip accelerometer placement; 2) examine procedural reliability of a walking protocol used to measure physical activity (PA); and 3) confirm concurrent validity of accelerometers in measuring PA intensity as compared to the gold standard of oxygen consumption measured by indirect calorimetry.

Methods: Eight children (mean age: 11.9; SD: 3.