Gabriela Lopes Gama

Effects of treadmill inclination on hemiparetic gait: controlled and randomized clinical trial.

ObjectiveThe aim of this study was to analyze the effects of inclined treadmill training on the kinematic characteristics of gait in subjects with hemiparesis. DesignA blind, randomized, controlled study was conducted with 28 subjects divided into two groups: the control group, submitted to partial body weight–support treadmill gait training with no inclination, and the experimental group, which underwent partial body weight–support treadmill training at 10% of inclination. All volunteers were assessed for functional independence, motor function, balance, and gait before and after the 12 training sessions. ResultsBoth groups showed posttraining alterations in balance (P < 0.001), motor function (P < 0.001), and functional independence (P = 0.002). Intergroup differences in spatiotemporal differences were observed, where only the experimental group showed posttraining alterations in velocity (P = 0.02) and paretic step length (P = 0.03). Angular variables showed no significant differences in either group. ConclusionsIn subjects with hemiparesis, the addition of inclination is a stimulus capable of enhancing the effects of partial body weight–support treadmill gait training.

Effects of Gait Training With Body Weight Support on a Treadmill Versus Overground in Individuals With Stroke

OBJECTIVE To investigate the effects of gait training with body weight support (BWS) on a treadmill versus overground in individuals with chronic stroke. DESIGN Randomized controlled trial. SETTING University research laboratory. PARTICIPANTS Individuals (N=28) with chronic stroke (>6mo from the stroke event). INTERVENTIONS Participants were randomly assigned to receive gait training with BWS on a treadmill (n=14) or overground (n=14) 3 times a week for 6 weeks. MAIN OUTCOME MEASURES Gait speed measured using the 10-meter walk test, endurance measured using the 6-minute walk test, functional independence measured using the motor domain of the FIM, lower limb recovery measured using the lower extremity domain of the Fugl-Meyer assessment, step length, step length symmetry ratio, and single-limb support duration. Measurements were obtained at baseline, immediately after the training session, and 6 weeks after the training session. RESULTS At 1 week after the last training session, both groups improved in all outcome measures except paretic step length and step length symmetry ratio, which were improved only in the overground group (P=.01 and P=.01, respectively). At 6 weeks after the last training session, all improvements remained and the treadmill group also improved paretic step length (P<.001) but not step length symmetry ratio (P>.05). CONCLUSIONS Individuals with chronic stroke equally improve gait speed and other gait parameters after 18 sessions of BWS gait training on either a treadmill or overground. Only the overground group improved step length symmetry ratio, suggesting a role of integrating overground walking into BWS interventions poststroke.

Effects of Treadmill Training with Load on Gait in Parkinson Disease: A Randomized Controlled Clinical Trial.

ObjectiveThe aim of this study was to assess the effects of 3% of body weight loads (0%, 5%, and 10%) on treadmill gait training in subjects with Parkinson disease. DesignThis study used a randomized controlled single-blind trial. ResultsSpatiotemporal variables demonstrated significant intragroup alterations in all three groups at pretraining and posttraining, with an increase in speed (m/sec; F = 4.73, P = 0.04), stride length (m; F = 12.00, P = 0.002), and step length (m; F = 16.16, P = 0.001) and a decrease in the double-stance phase (%; F = 6.59, P = 0.02) and stance phase (%; F = 4.77, P = 0.04). Intergroup pretraining and posttraining did not exhibit significant differences (F < 2.18, P > 0.14). Angular variables showed significant intragroup alterations, with an increase in knee range of motion (F = 5.18, P = 0.03), and intergroup comparison revealed no significant changes (F = 1.87, P = 0.17). ConclusionsPosttraining improvements in speed, stride length, step length, double-stance, stance phase, and knee range of motion were observed in all groups, where no load (0%, 5%, or 10%) had any significant effect, suggesting that the influence of load did not make one experimental condition better than another. All participants benefitted from treadmill gait training, irrespective of the use of load.

Comparing the effects of adapting to a weight on one leg during treadmill and overground walking: A pilot study

BACKGROUND Locomotor adaptation has been suggested as a way to improve gait symmetry in individuals post-stroke. Most perturbation methods utilize costly, specialized equipment. The use of a unilateral leg weight may provide a low cost, clinically translatable alternative. Furthermore, previous studies have suggested that adaptation context may affect movement outcomes. The purpose of this study was to assess the ability of a unilaterally applied ankle weight to drive locomotor adaptation and determine the effect of context (treadmill versus overground) in young, non-disabled participants. METHODS Eighteen young non-disabled adults were randomly assigned to receive 10min of walking on a treadmill with a weight (TG), overground with a weight (OG) or as a control on a treadmill/overground without a weight (CG). Outcomes measured before, during and after adaptation were: step length symmetry, single limb support symmetry and gait speed. RESULTS After adding the weight, single limb support immediately became asymmetrical for all participants without changes in step length symmetry. After walking for 10min, TG step length became asymmetrical. After weight removal, both TG and OG had increased step length asymmetry. TG decreased single limb support asymmetry while OG did not. After walking overground without the weight, walking parameters eventually returned to baseline in both weighted groups. The control group showed no changes. CONCLUSION A unilaterally applied ankle weight appears able to cause gait adaptation in young, non-disabled participants. However different adaptive changes in the gait pattern are made by the nervous system when the perturbation is applied in different contexts.

Post-stroke hemiparesis: Does chronicity, etiology, and lesion side are associated with gait pattern?

Abstract Background: Studies that evaluate gait rehabilitation programs for individuals with stroke often consider time since stroke of more than six months. In addition, most of these studies do not use lesion etiology or affected cerebral hemisphere as study factors. However, it is unknown whether these factors are associated with post-stroke motor performance after the spontaneous recovery period. Objective: To investigate whether time since stroke onset, etiology, and lesion side is associated with spatiotemporal and angular gait parameters of individuals with chronic stroke. Methods: Fifty individuals with chronic hemiparesis (20 women) were evaluated. The sample was stratified according to time since stroke (between 6 and 12 months, between 13 and 36 months, and over 36 months), affected cerebral hemisphere (left or right) and lesion etiology (ischemic and hemorrhagic). The participants were evaluated during overground walking at self-selected gait speed, and spatiotemporal and angular gait parameters were calculated. Results Differences between gait speed, stride length, hip flexion, and knee flexion were observed in subgroups stratified based on lesion etiology. Survivors of a hemorrhagic stroke exhibited more severe gait impairment. Subgroups stratified based on time since stroke only showed intergroup differences for stride length, and subgroups stratified based on affected cerebral hemisphere displayed between-group differences for swing time symmetry ratio. Conclusion: In order to recruit a more homogeneous sample, more accurate results were obtained and an appropriate rehabilitation program was offered, researchers and clinicians should consider that gait pattern might be associated with time since stroke, affected cerebral hemisphere and lesion etiology.