Figure 1.

Graph showing changes in performance on the Berg Balance Scale (A) and Six Minute Walk (B) in individuals with PD who completed 20 twice weekly, one-hour sessions of tango, waltz/foxtrot, Tai Chi, or no exercise (Control). Asterisks denote significant improvements from pre- to post-intervention as determined using two-way repeated measures ANOVAs with group and time as factors. All three interventions resulted in improved balance and walking performance, with dance having larger effect sizes than Tai Chi. (Portions of these data have been presented previously in a different form ³⁶,³⁷, however the statistical analysis presented here that compares all four groups has not been reported elsewhere.)