title: Hemiparetic gait parameters in overground versus treadmill walking.
abstract: OBJECTIVE
  Hemiparetic gait is characterized by high stride-cycle variability, diminished stance time, single-limb stance time, and stance/swing ratio in the paretic limb. Recent studies suggest treadmill (TM) training may improve the motor control underlying these variables, but supporting evidence is sparse.
  
  
  METHODS
  This study compared gait patterns of untrained chronic hemiparetic stroke patients (n = 18; mean, 39.5 months poststroke) during overground (OG) and TM walking at matched velocities. Variables included relative stance time, relative single-limb stance time, stance/swing ratio, peak force, and impulse. Within-subject variability of these measures (CV) was used to assess gait pattern stability.
  
  
  RESULTS
  OG and TM cycle durations were similar, but CVs differed (TM < OG, p < 0.05). In the paretic limb, differences were seen in relative stance time, relative single-limb stance time, and stance/swing ratio, respectively (TM > OG, p < 0.05). These variables decreased in the nonparetic limb during TM walking (p < 0.05 for all). Improved interlimb symmetry and coordination were evidenced by decreased between-limb differences and improved relative temporal phasing, respectively, in the TM condition (p < 0.05).
  
  
  CONCLUSIONS
  Collectively, these results demonstrate that the TM induces an immediate alteration toward a more consistent and symmetric gait pattern. Further investigation is needed to determine whether TM training leads to motor relearning and neuroplasticity in chronic hemiparetic subjects.
authors.affiliation: Department of Physical Therapy, School of Medicine, University of Maryland-Baltimore, 21201, USA.
authors.forename: M L
authors.initials: ML
authors.lastname: Harris-Love
authors.forename: L W
authors.initials: LW
authors.lastname: Forrester
authors.forename: R F
authors.initials: RF
authors.lastname: Macko
authors.forename: K H
authors.initials: KH
authors.lastname: Silver
authors.forename: G V
authors.initials: GV
authors.lastname: Smith
mesh_terms: D002908:Chronic Disease; D004864:Equipment and Supplies; D015444:Exercise; D005260:Female; D005684:Gait; D006801:Humans; D007866:Leg / Q000503:physiopathology; D008297:Male; D010291:Paresis / Q000209:etiology / Q000503:physiopathology* / Q000534:rehabilitation*; D010806:Physical Education and Training; D020521:Stroke / Q000150:complications; D013997:Time Factors; D016138:Walking