Cycling efficiency (mean and standard deviation) for all subjects. When actual cadence (rather than targeted cadence) was used as a covariate, there were significant main effects of group (P=.0127) and cadence (P=.0068); however, the interaction was not significant. V̇o2=volume of oxygen consumed, TD30=subjects with typical development (TD) at cadence of 30 rpm, CP30=subjects with cerebral palsy (CP) at cadence of 30 rpm, TD60=subjects with TD at cadence of 60 rpm, CP60=subjects with CP at cadence of 60 rpm.