Functional electrical stimulation with exercises for standing balance and weight transfer in acute stroke patients: a feasibility randomized controlled trial

Physical rehabilitation approaches for the recovery of function and mobility following stroke

BACKGROUND

Various approaches to physical rehabilitation to improve function and mobility are used after stroke. There is considerable controversy around the relative effectiveness of approaches, and little known about optimal delivery and dose. Some physiotherapists base their treatments on a single approach; others use components from several different approaches.

OBJECTIVES

Primary objective: To determine whether physical rehabilitation is effective for recovery of function and mobility in people with stroke, and to assess if any one physical rehabilitation approach is more effective than any other approach.

SECONDARY OBJECTIVE

To explore factors that may impact the effectiveness of physical rehabilitation approaches, including time after stroke, geographical location of study, intervention dose/duration, intervention provider, and treatment components. Stakeholder involvement: Key aims were to clarify the focus of the review, inform decisions about subgroup analyses, and co-produce statements relating to key implications.

SEARCH METHODS

For this update, we searched the Cochrane Stroke Trials Register (last searched November 2022), CENTRAL (2022, Issue 10), MEDLINE (1966 to November 2022), Embase (1980 to November 2022), AMED (1985 to November 2022), CINAHL (1982 to November 2022), and the Chinese Biomedical Literature Database (to November 2022).

SELECTION CRITERIA

Inclusion criteria: Randomised controlled trials (RCTs) of physical rehabilitation approaches aimed at promoting the recovery of function or mobility in adult participants with a clinical diagnosis of stroke.

EXCLUSION CRITERIA

RCTs of upper limb function or single treatment components.

PRIMARY OUTCOMES

measures of independence in activities of daily living (IADL) and motor function.

SECONDARY OUTCOMES

balance, gait velocity, and length of stay.

DATA COLLECTION AND ANALYSIS

Two independent authors selected studies according to pre-defined eligibility criteria, extracted data, and assessed the risk of bias in the included studies. We used GRADE to assess the certainty of evidence.

MAIN RESULTS

In this review update, we included 267 studies (21,838 participants). Studies were conducted in 36 countries, with half (133/267) in China. Generally, studies were heterogeneous, and often poorly reported. We judged only 14 studies in meta-analyses as at low risk of bias for all domains and, on average, we considered 33% of studies in analyses of primary outcomes at high risk of bias. Is physical rehabilitation more effective than no (or minimal) physical rehabilitation? Compared to no physical rehabilitation, physical rehabilitation may improve IADL (standardised mean difference (SMD) 1.32, 95% confidence interval (CI) 1.08 to 1.56; 52 studies, 5403 participants; low-certainty evidence) and motor function (SMD 1.01, 95% CI 0.80 to 1.22; 50 studies, 5669 participants; low-certainty evidence). There was evidence of long-term benefits for these outcomes. Physical rehabilitation may improve balance (MD 4.54, 95% CI 1.36 to 7.72; 9 studies, 452 participants; low-certainty evidence) and likely improves gait velocity (SMD 0.23, 95% CI 0.05 to 0.42; 18 studies, 1131 participants; moderate-certainty evidence), but with no evidence of long-term benefits. Is physical rehabilitation more effective than attention control? The evidence is very uncertain about the effects of physical rehabilitation, as compared to attention control, on IADL (SMD 0.91, 95% CI 0.06 to 1.75; 2 studies, 106 participants), motor function (SMD 0.13, 95% CI -0.13 to 0.38; 5 studies, 237 participants), and balance (MD 6.61, 95% CI -0.45 to 13.66; 4 studies, 240 participants). Physical rehabilitation likely improves gait speed when compared to attention control (SMD 0.34, 95% CI 0.14 to 0.54; 7 studies, 405 participants; moderate-certainty evidence). Does additional physical rehabilitation improve outcomes? Additional physical rehabilitation may improve IADL (SMD 1.26, 95% CI 0.82 to 1.71; 21 studies, 1972 participants; low-certainty evidence) and motor function (SMD 0.69, 95% CI 0.46 to 0.92; 22 studies, 1965 participants; low-certainty evidence). Very few studies assessed these outcomes at long-term follow-up. Additional physical rehabilitation may improve balance (MD 5.74, 95% CI 3.78 to 7.71; 15 studies, 795 participants; low-certainty evidence) and gait velocity (SMD 0.59, 95% CI 0.26 to 0.91; 19 studies, 1004 participants; low-certainty evidence). Very few studies assessed these outcomes at long-term follow-up. Is any one approach to physical rehabilitation more effective than any other approach? Compared to other approaches, those that focus on functional task training may improve IADL (SMD 0.58, 95% CI 0.29 to 0.87; 22 studies, 1535 participants; low-certainty evidence) and motor function (SMD 0.72, 95% CI 0.21 to 1.22; 20 studies, 1671 participants; very low-certainty evidence) but the evidence in the latter is very uncertain. The benefit was sustained long-term. The evidence is very uncertain about the effect of functional task training on balance (MD 2.16, 95% CI -0.24 to 4.55) and gait velocity (SMD 0.28, 95% CI -0.01 to 0.56). Compared to other approaches, neurophysiological approaches may be less effective than other approaches in improving IADL (SMD -0.34, 95% CI -0.63 to -0.06; 14 studies, 737 participants; low-certainty evidence), and there may be no difference in improving motor function (SMD -0.60, 95% CI -1.32 to 0.12; 13 studies, 663 participants; low-certainty evidence), balance (MD -0.60, 95% CI -5.90 to 6.03; 9 studies, 292 participants; low-certainty evidence), and gait velocity (SMD -0.17, 95% CI -0.62 to 0.27; 16 studies, 630 participants; very low-certainty evidence), but the evidence is very uncertain about the effect on gait velocity. For all comparisons, the evidence is very uncertain about the effects of physical rehabilitation on adverse events and length of hospital stay.

AUTHORS' CONCLUSIONS

Physical rehabilitation, using a mix of different treatment components, likely improves recovery of function and mobility after stroke. Additional physical rehabilitation, delivered as an adjunct to 'usual' rehabilitation, may provide added benefits. Physical rehabilitation approaches that focus on functional task training may be useful. Neurophysiological approaches to physical rehabilitation may be no different from, or less effective than, other physical rehabilitation approaches. Certainty in this evidence is limited due to substantial heterogeneity, with mainly small studies and important differences between study populations and interventions. We feel it is unlikely that any studies published since November 2022 would alter our conclusions. Given the size of this review, future updates warrant consensus discussion amongst stakeholders to ensure the most relevant questions are explored for optimal decision-making.

Implications of neuromuscular electrical stimulation on gait ability, balance and kinematic parameters after stroke: a systematic review and meta-analysis

INTRODUCTIN

Improper gait patterns, impaired balance and foot drop consistently plague stroke survivors, preventing them from walking independently and safely. Neuromuscular electrical stimulation (NMES) technology can help patients reactivate their muscles and regain motor coordination. This study aims to systematically review and summarize the evidence for the potential benefits of NMES on the improvement of gait patterns after stroke.

EVIDENCE ACQUISITION

PubMed, Cochrane Library, Embase, Science Direct and Web of Science were systematically searched until April 2024, to identify randomized controlled trials with the following criteria: stroke survivors as participants; NMES as intervention; conventional rehabilitation as a comparator; and gait assessment, through scales or quantitative parameters, as outcome measures.

EVIDENCE SYNTHESIS

29 publications involving 1711 patients met the inclusion criteria. Meta-analysis showed no significant differences in Ten-meter walk test, Fugl-Meyer assessment lower extremity, Modified Ashworth Assessment and asymmetry between the NMES group and the control group. Besides, NMES was associated with changes in outcome indicators such as quantitative gait analysis speed [SMD = 0.53, 95% CI (0.20, 0.85), P = 0.001], cadence [SMD = 0.76, 95% CI (0.32, 1.20), P = 0.0008], affected side step length [SMD = 0.73, 95% CI (0.16, 1.31), P = 0.01], angle of ankle dorsiflexion [WMD = 1.57, 95% CI (0.80, 2.33), P < 0.0001], Six-Minute Walk Test [WMD = 14.83, 95% CI (13.55, 16.11), P<0.00001]. According to the PEDro scale, 21 (72.4%) studies were of high quality and 8 were of moderate quality (27.6%).

CONCLUSIONS

Taken together, the review synthesis indicated that NMES might play a potential role in stroke-induced walking dysfunction. And NMES may be superior for survivors in the chronic phase than the acute and subacute phases, and the efficacy of short sessions received by patients was greater than that of those who participated in a longer session. Additionally, further comparisons of the effects of NMES with different types or stimulation frequencies may provide unexpected benefits.

Rehabilitative effects of electrical stimulation on gait performance in stroke patients: A systematic review with meta-analysis

BACKGROUND

Electrical stimulation techniques are widely utilized for rehabilitation management in individuals with stroke patients.

OBJECTIVES

This review aims to summarize the rehabilitative effects of electrical stimulation therapy on gait performance in stroke patients.

METHODS

This review included randomized controlled trials (RCT) investigating the therapeutic effects of electrical stimulation in stroke patients throughout five databases. This review qualitatively synthesized 20 studies and quantitatively analyzed 11 RCTs.

RESULTS

Functional electrical stimulation (FES) was the most commonly used electrical stimulation type to improve postural stability and gait performance in stroke patients. The clinical measurement tools commonly used in the three studies to assess the therapeutic effects of FES were Berg balance scale (BBS), 10-meter walk test (10MWT), 6-minute walk test (6mWT), and gait velocity. The BBS score and gait velocity had positive effects in the FES group compared with the control group, but the 10MWT and 6mWT showed the same effects between the two groups. The heterogeneity of BBS scores was also high.

CONCLUSION

The results of this review suggest that electrical stimulation shows little evidence of postural stability and gait performance in stroke patients, although some electrical stimulations showed positive effects on postural stability and gait performance.

Effects of adding exercise to usual care in patients with either hypertension, type 2 diabetes or cardiovascular disease: a systematic review with meta-analysis and trial sequential analysis

Objective

To assess the beneficial and harmful effects of adding exercise to usual care for people with hypertension, type 2 diabetes mellitus and/or cardiovascular disease.

Design

Systematic review with meta-analysis and trial sequential analysis of randomised clinical trials.

Data sources

The CENTRAL, MEDLINE, EMBASE, Science Citation Index Expanded on Web of Science and BIOSIS searched from inception to July 2020.

Eligibility criteria for selecting studies

We included all randomised clinical trials adding any form of trialist defined exercise to usual care versus usual care in participants with either hypertension, type 2 diabetes or cardiovascular disease irrespective of setting, publication status, year and language.

Outcome and measures

The primary outcomes were all-cause mortality, serious adverse events and quality of life.

Data extraction and synthesis

Five independent reviewers extracted data and assessed risk of bias in pairs. Our methodology was based on Preferred Reporting Items for Systematic Reviews and Meta-Analyses, Grading of Recommendations Assessment, Development and Evaluation and Cochrane Risk of Bias-version 1.

Results

We included 950 trials, of which 248 trials randomising 21 633 participants reported on our predefined outcomes. All included trials were at high risk of bias. The major types of exercise reported were dynamic aerobic exercise (126/248 trials), dynamic resistance exercise (25/248 trials), and combined aerobic and resistance exercise (58/248 trials). The study participants were included due to cardiovascular diseases (189/248 trials), type 2 diabetes (41/248 trials) or hypertension (16/248 trials). The median intervention period was 3 months (IQR: 2–4 months) and the median follow-up period was 6 months (IQR: 3–8 months) after randomisation. Meta-analyses and trial sequential analyses showed evidence of a beneficial effect of adding exercise to usual care when assessing all-cause mortality (risk ratio (RR) 0.82; 95% CI 0.73 to 0.93; I2=0%, moderate certainty of evidence) and serious adverse events (RR 0.79; 95% CI 0.71 to 0.88; I2=0%, moderate certainty of evidence). We did not find evidence of a difference between trials from different economic regions, type of participants, type of exercise or duration of follow-up. Quality of life was assessed using several different tools, but the results generally showed that exercise improved quality of life, but the effect sizes were below our predefined minimal important difference.

Conclusions

A short duration of any type of exercise seems to reduce the risk of all-cause mortality and serious adverse events in patients with either hypertension, type 2 diabetes or cardiovascular diseases. Exercise seems to have statistically significant effects on quality of life, but the effect sizes seem minimal.

PROSPERO registration number

CRD42019142313.

Effects of EMG-triggered FES during trunk pattern in PNF on balance and gait performance in persons with stroke

BACKGROUND

EMG-triggered functional electrical stimulation (EMG-triggered FES) is one of the effective method for improving task performance and providing movement re-learning of central nervous system. Proprioceptive neuromuscular facilitation (PNF) is a traditional manual therapy that is used as a method to regain normal movement by providing specific training methods.

OBJECTIVE

The purpose of this study was to investigate the effect of EMG-triggered FES during trunk pattern in PNF on trunk control, balance, and gait of stroke patients.

METHODS

Forty participants were randomly allocated to EMG-triggered FES during PNF trunk pattern group (n = 20) and PNF trunk pattern group (n = 20). This study was a pretest-posttest with a control group design for duration of 4weeks (30 min/5 times/1 week). Outcome measures involved trunk impairment scale (TIS), Berg balance scale (BBS), and dynamic gait index (DGI).

RESULTS

In the experimental group and control group, TIS, BBS, and DGI score was significantly increased after intervention. However, there was no significant difference between the two groups in the comparison of the experimental group and the control group according to the amount of change before and after the training.

CONCLUSIONS

The results of this study showed that PNF trunk pattern affected the trunk control for stroke patients, and increased trunk control ability was effective in improving balance and walking. In addition, it was found that the EMG-triggered FES applied to the PNF trunk pattern affected the trunk control.

Electrical Stimulation in Lower Limb During Exercise to Improve Gait Speed and Functional Motor Ability 6 Months Poststroke. A Review with Meta-Analysis

INTRODUCTION

Stroke is the third most common cause of disability in adults over 65 years of age and there are 30.7 million survivors after stroke worldwide. Stroke survivors have the highest odds of reporting severe disability and the greatest variety of individual domains of disability compared to a range of other conditions. Electrical stimulation of peripheral sensory-motor systems increases voluntary movement and muscle strength and thereby raises the activities of daily living (ADL). Little is known about electrical stimulation during physical activity in rehabilitation; the objective of this review is therefore to investigate whether external electrical stimulation combined with activity improves functional motor ability and gait speed in patients who have experienced a stroke within the last 6 months.

METHODS

A review and random effects meta-analysis of randomized controlled clinical trials on gait speed and functional motor ability measured with Barthel Index (BI) and Bergs Balance Scale (BBS).

RESULTS

Eight trials were included (n = 191). Explorative meta-analysis was performed on gait speed (5 trials, n = 120), BI (3 trials, n = 74), and BBS (3 trial n = 79). A small, significant difference on gait speed 0.15 (95% confidence interval [CI]: 0.08-0.21) m/s, but no difference in BI 2.88 (95 % CI: -3.3 to 9.07) and BBS 1.73 (95% CI: -2.8 to 6.27).

CONCLUSIONS

Sparse, low-quality evidence indicates that electrical stimulation combined with activity is a relevant intervention to improve ADL within 6 months poststroke.

Standard early rehabilitation and lower limb transcutaneous nerve or neuromuscular electrical stimulation in acute stroke patients: a randomized controlled pilot study

OBJECTIVE

We investigated adding lower limb transcutaneous nerve stimulation or neuromuscular electrical stimulation to standard early rehabilitation in acute stroke patients.

DESIGN

An assessor-blinded, randomized controlled pilot study.

SETTING

A medical stroke center.

SUBJECTS

First-stroke patients aged 20-80 years admitted to the stroke center within 24 hours post stroke.

INTERVENTIONS

A total of 42 participants were randomly assigned to groups: transcutaneous nerve stimulation + standard early rehabilitation, neuromuscular electrical stimulation + standard early rehabilitation, or standard early rehabilitation-only. Transcutaneous nerve or neuromuscular electrical stimulation was delivered to the affected tibialis anterior and quadriceps muscles for 30 minutes a day, five days per week for two weeks.

MAIN MEASURES

The Postural Assessment Scale for Stroke Patients, the Functional Independence Measure, and three mobility milestones, namely, sitting for >five minutes, standing for >one minute, and walking ⩾50 m, were evaluated, respectively, at baseline, at the two-week post-intervention, and at two-week follow-up.

RESULTS

Significant differences existed in the Postural Assessment Scale for Stroke Patients scores between the transcutaneous nerve stimulation and standard early rehabilitation-only groups measured at two-weeks post-intervention (mean (SD) = 31.38 (5.39) and 18.00 (8.65), respectively) and at the two-week follow-up (34.08 (2.69) and 26.14 (7.77), respectively). A higher proportion of participants could walk ⩾50 m independently in the transcutaneous nerve stimulation group than in the standard early rehabilitation-only group at the two-week post-intervention (P = 0.013) and two-week follow-up (P = 0.01) marks.

CONCLUSION

Two weeks of transcutaneous nerve stimulation added to standard early rehabilitation improved postural stability and walking in acute stroke patients.

The Effectiveness of Lower-Limb Wearable Technology for Improving Activity and Participation in Adult Stroke Survivors: A Systematic Review

BACKGROUND

With advances in technology, the adoption of wearable devices has become a viable adjunct in poststroke rehabilitation. Regaining ambulation is a top priority for an increasing number of stroke survivors. However, despite an increase in research exploring these devices for lower limb rehabilitation, little is known of the effectiveness.

OBJECTIVE

This review aims to assess the effectiveness of lower limb wearable technology for improving activity and participation in adult stroke survivors.

METHODS

Randomized controlled trials (RCTs) of lower limb wearable technology for poststroke rehabilitation were included. Primary outcome measures were validated measures of activity and participation as defined by the International Classification of Functioning, Disability and Health. Databases searched were MEDLINE, Web of Science (Core collection), CINAHL, and the Cochrane Library. The Cochrane Risk of Bias Tool was used to assess the methodological quality of the RCTs.

RESULTS

In the review, we included 11 RCTs with collectively 550 participants at baseline and 474 participants at final follow-up including control groups and participants post stroke. Participants' stroke type and severity varied. Only one study found significant between-group differences for systems functioning and activity. Across the included RCTs, the lowest number of participants was 12 and the highest was 151 with a mean of 49 participants. The lowest number of participants to drop out of an RCT was zero in two of the studies and 19 in one study. Significant between-group differences were found across three of the 11 included trials. Out of the activity and participation measures alone, P values ranged from P=.87 to P ≤.001.

CONCLUSIONS

This review has highlighted a number of reasons for insignificant findings in this area including low sample sizes, appropriateness of the RCT methodology for complex interventions, a lack of appropriate analysis of outcome data, and participant stroke severity.

Hardware System for Real-Time EMG Signal Acquisition and Separation Processing during Electrical Stimulation

The study aimed to develop a real-time electromyography (EMG) signal acquiring and processing device that can acquire signal during electrical stimulation. Since electrical stimulation output can affect EMG signal acquisition, to integrate the two elements into one system, EMG signal transmitting and processing method has to be modified. The whole system was designed in a user-friendly and flexible manner. For EMG signal processing, the system applied Altera Field Programmable Gate Array (FPGA) as the core to instantly process real-time hybrid EMG signal and output the isolated signal in a highly efficient way. The system used the power spectral density to evaluate the accuracy of signal processing, and the cross correlation showed that the delay of real-time processing was only 250 μs.