The effects of mirror neuron system-based self-observation training on lower limb muscle activity and dynamic balance in patients with chronic stroke.

[Purpose] This study aimed to investigate the effects of mirror neuron system-based self-observation training on lower limb muscle activity and dynamic balance in patients with chronic stroke. [Participants and Methods] Twenty patients with chronic stroke were randomly assigned to a self-observation training group (n=10) or a control group (n=10). Both groups followed a routine 30-minute exercise therapy regimen five days a week for four weeks. The self-observation training group additionally watched video clips of their balance and functional gait training and performed physical training twice over a 10-minute time span. Each self-observation training session was performed for 30 minutes, three times a week for four weeks. Muscle activity was evaluated using surface electromyography; dynamic balance was evaluated using timed up and go and 10-meterwalk tests. [Results] Within-group comparisons showed significant differences in muscular activities of the rectus femoris, biceps femoris, tibialis anterior, and gastrocnemius and dynamic balance. Comparing between groups, the muscle activity of the rectus femoris, biceps femoris, tibialis anterior, and gastrocnemius and dynamic balance were significantly different between experimental and control groups. [Conclusion] Self-observation training improved lower limb muscle activity and dynamic balance in patients with chronic stroke.

Relationship between dynamic balance and spatiotemporal gait symmetry in hemiplegic patients with chronic stroke.

BACKGROUND: Poor dynamic balance, which is common after stroke, may affect gait function. In particular, spatiotemporal asymmetrical gait patterns may occur in hemiplegic patients after stroke. OBJECTIVE: This study aimed to assess the relationship between dynamic balance and spatiotemporal gait symmetry in patients with chronic hemiplegic stroke. METHODS: To calculate symmetry ratios for step length (spatial parameter) and swing time (temporal parameter), 41 patients with chronic stroke walked at a comfortable speed. The dynamic balance measures included limit of stability (LOS) during standing and heel-to-heel base of support (H-H BOS) during gait. Analysis of correlations between various measures was performed. RESULTS: The overall LOS score correlated with temporal gait symmetry (r = 0.66). The forward, backward, paretic, and non-paretic direction LOS scores were related to temporal gait symmetry (r = 0.38-0.62). The H-H BOS was correlated with temporal (r = -0.63) and spatial (r = -0.36) gait symmetries. Other dynamic balance variables were not significantly correlated with spatial gait symmetry. CONCLUSION: Thus, control of dynamic balance abilities is related to the magnitude of temporal gait symmetry. This observation suggests that rehabilitation strategies that improve dynamic balance may enhance temporal gait symmetry in post-stroke patients.

Effect of intensive aerobic exercise on respiratory capacity and walking ability with chronic stroke patients: a randomized controlled pilot trial.

[Purpose] To investigate the effects of intensive aerobic exercise on respiratory capacity and walking ability in chronic stroke patients. [Subjects and Methods] The subjects were randomly assigned to an experimental group (n=6) or a control group (n=6). Patients in the experimental group received intensive aerobic exercise for 30 minutes and traditional physical therapy once a day, five days a week, for four weeks. The control group received aerobic exercise for 30 minutes and traditional physical therapy for 30 minutes a day, five days a week, for four weeks. [Results] After the intervention, both groups showed significant improvements in the forced vital capacity, forced expiratory volume in one second, 10-meter walking test, and six-minute walking test over the baseline results. The comparison of the two groups after the intervention revealed that the experimental group showed more significant improvements in the forced vital capacity, forced expiratory volume in one second, and six-minute walking test. There was no significant difference in saturation pulse oximetry oxygen and 10-meter walking test between the groups. [Conclusion] The results of this study suggest that intensive aerobic exercise has a positive effect on respiratory capacity and walking endurance in patients with chronic stroke.