title: Balance, Body Motion, and Muscle Activity After High-Volume Short-Term Dance-Based Rehabilitation in Persons With Parkinson Disease: A Pilot Study.
abstract: OBJECTIVE
  The objectives of this pilot study were to (1) evaluate the feasibility and investigate the efficacy of a 3-week, high-volume (450 minutes per week) Adapted Tango intervention for community-dwelling individuals with mild-moderate Parkinson disease (PD) and (2) investigate the potential efficacy of Adapted Tango in modifying electromyographic (EMG) activity and center of body mass (CoM) displacement during automatic postural responses to support surface perturbations.
  
  
  METHODS
  Individuals with PD (n = 26) were recruited for high-volume Adapted Tango (15 lessons, 1.5 hour each over 3 weeks). Twenty participants were assessed with clinical balance and gait measures before and after the intervention. Nine participants were also assessed with support-surface translation perturbations.
  
  
  RESULTS
  Overall adherence to the intervention was 77%. At posttest, peak forward CoM displacement was reduced (4.0 ± 0.9 cm, pretest, vs 3.7 ± 1.1 cm, posttest; P = 0.03; Cohen's d = 0.30) and correlated to improvements on Berg Balance Scale (ρ = -0.68; P = 0.04) and Dynamic Gait Index (ρ = -0.75; P = 0.03). Overall antagonist onset time was delayed (27 ms; P = 0.02; d = 0.90) and duration was reduced (56 ms, ≈39%, P = 0.02; d = 0.45). Reductions in EMG magnitude were also observed (P < 0.05).
  
  
  CONCLUSIONS
  Following participation in Adapted Tango, changes in kinematic and some EMG measures of perturbation responses were observed in addition to improvements in clinical measures. We conclude that 3-week, high-volume Adapted Tango is feasible and represents a viable alternative to longer duration adapted dance programs.Video Abstract available for more insights from the authors (see Supplemental Digital Content 1, http://links.lww.com/JNPT/A143).
authors: The Wallace H. Coulter Department of Biomedical Engineering, Emory University, and the Georgia Institute of Technology (J.L.M., L.H.T.), Atlanta VA Center of Excellence for Visual & Neurocognitive Rehabilitation (M.E.H.), and Department of Medicine, Division of General Medicine and Geriatrics, Emory University School of Medicine (M.E.H.), Atlanta, GA.
authors: J Lucas
authors: JL
authors: McKay
authors: Lena H
authors: LH
authors: Ting
authors: Madeleine E
authors: ME
authors: Hackney
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001696:Biomechanical Phenomena; D003615:Dancing; D004576:Electromyography; D015444:Exercise; D005081:Exercise Therapy; D005240:Feasibility Studies; D005684:Gait; D006801:Humans; D008875:Middle Aged; D009068:Movement; D009119:Muscle Contraction; D010300:Parkinson Disease / Q000534:rehabilitation*; D010865:Pilot Projects; D004856:Postural Balance; D016896:Treatment Outcome