Stroke is a major health issue and cause of long‐term disability and has a major emotional
and socioeconomic impact. There is a need to explore options for long‐term sustainable
interventions that support stroke survivors to engage in meaningful activities to
address life challenges after stroke. Rehabilitation focuses on recovery of function
and cognition to the maximum level achievable, and may include a wide range of complementary
strategies including yoga. Yoga is a mind‐body practice that originated in India,
and which has become increasingly widespread in the Western world. Recent evidence
highlights the positive effects of yoga for people with a range of physical and psychological
health conditions. A recent non‐Cochrane systematic review concluded that yoga can
be used as self‐administered practice in stroke rehabilitation. To assess the effectiveness
of yoga, as a stroke rehabilitation intervention, on recovery of function and quality
of life (QoL). We searched the Cochrane Stroke Group Trials Register (last searched
July 2017), Cochrane Central Register of Controlled Trials (CENTRAL) (last searched
July 2017), MEDLINE (to July 2017), Embase (to July 2017), CINAHL (to July 2017),
AMED (to July 2017), PsycINFO (to July 2017), LILACS (to July 2017), SciELO (to July
2017), IndMED (to July 2017), OTseeker (to July 2017) and PEDro (to July 2017). We
also searched four trials registers, and one conference abstracts database. We screened
reference lists of relevant publications and contacted authors for additional information.
We included randomised controlled trials (RCTs) that compared yoga with a waiting‐list
control or no intervention control in stroke survivors. Two review authors independently
extracted data from the included studies. We performed all analyses using Review Manager
(RevMan). One review author entered the data into RevMan; another checked the entries.
We discussed disagreements with a third review author until consensus was reached.
We used the Cochrane 'Risk of bias' tool. Where we considered studies to be sufficiently
similar, we conducted a meta‐analysis by pooling the appropriate data. For outcomes
for which it was inappropriate or impossible to pool quantitatively, we conducted
a descriptive analysis and provided a narrative summary. We included two RCTs involving
72 participants. Sixty‐nine participants were included in one meta‐analysis (balance).
Both trials assessed QoL, along with secondary outcomes measures relating to movement
and psychological outcomes; one also measured disability. In one study the Stroke
Impact Scale was used to measure QoL across six domains, at baseline and post‐intervention.
The effect of yoga on five domains (physical, emotion, communication, social participation,
stroke recovery) was not significant; however, the effect of yoga on the memory domain
was significant (mean difference (MD) 15.30, 95% confidence interval (CI) 1.29 to
29.31, P = 0.03), the evidence for this finding was very low grade. In the second
study, QoL was assessed using the Stroke‐Specifc QoL Scale; no significant effect
was found. Secondary outcomes included movement, strength and endurance, and psychological
variables, pain, and disability. Balance was measured in both studies using the Berg
Balance Scale; the effect of intervention was not significant (MD 2.38, 95% CI ‐1.41
to 6.17, P = 0.22). Sensititivy analysis did not alter the direction of effect. One
study measured balance self‐efficacy, using the Activities‐specific Balance Confidence
Scale (MD 10.60, 95% CI ‐7.08,= to 28.28, P = 0.24); the effect of intervention was
not significant; the evidence for this finding was very low grade. One study measured
gait using the Comfortable Speed Gait Test (MD 1.32, 95% CI ‐1.35 to 3.99, P = 0.33),
and motor function using the Motor Assessment Scale (MD ‐4.00, 95% CI ‐12.42 to 4.42,
P = 0.35); no significant effect was found based on very low‐grade evidence. One study
measured disability using the modified Rankin Scale (mRS) but reported only whether
participants were independent or dependent. No significant effect was found: (odds
ratio (OR) 2.08, 95% CI 0.50 to 8.60, P = 0.31); the evidence for this finding was
very low grade. Anxiety and depression were measured in one study. Three measures
were used: the Geriatric Depression Scale‐Short Form (GCDS15), and two forms of State
Trait Anxiety Inventory (STAI, Form Y) to measure state anxiety (i.e. anxiety experienced
in response to stressful situations) and trait anxiety (i.e. anxiety associated with
chronic psychological disorders). No significant effect was found for depression (GDS15,
MD ‐2.10, 95% CI ‐4.70 to 0.50, P = 0.11) or for trait anxiety (STAI‐Y2, MD ‐6.70,
95% CI ‐15.35 to 1.95, P = 0.13), based on very low‐grade evidence. However, a significant
effect was found for state anxiety: STAI‐Y1 (MD ‐8.40, 95% CI ‐16.74 to ‐0.06, P =
0.05); the evidence for this finding was very low grade. No adverse events were reported.
Quality of the evidence We assessed the quality of the evidence using GRADE. Overall,
the quality of the evidence was very low, due to the small number of trials included
in the review both of which were judged to be at high risk of bias, particularly in
relation to incompleteness of data and selective reporting, and especially regarding
the representative nature of the sample in one study. Yoga has the potential for being
included as part of patient‐centred stroke rehabilitation. However, this review has
identified insufficient information to confirm or refute the effectiveness or safety
of yoga as a stroke rehabilitation treatment. Further large‐scale methodologically
robust trials are required to establish the effectiveness of yoga as a stroke rehabilitation
treatment. Review question We wanted to know if yoga helps to improve quality of life
for stroke survivors. Background Stroke is a major health issue worldwide, which affects
people in many different ways. For example, stroke survivors may have problems moving
around, and communicating and socialising with other people. Stroke may also affect
how people feel. It may cause problems with memory and concentration. After discharge
from hospital or other stroke services, stroke survivors have to cope with the long‐term
effects of stroke. Research has shown that yoga can help people with other long‐term
conditions to cope better. Yoga can improve quality of life (QoL). Search date We
searched for studies published to July 2017. Study characteristics We found two research
studies that had assessed yoga for stroke survivors. Seventy‐two people took part
in the two studies. One study was in the USA and one was in Australia. On average,
the stroke survivors were between 60 and 63 years old and it had been between four
years three months and nine years since they had had a stroke. In the American study,
yoga classes were held twice a week for eight weeks. In the Australian study, yoga
classes were held once a week for 10 weeks. Both studies encouraged people to practice
yoga at home, in their own time. Both studies used waiting‐list control groups. This
means that people in the control group could go to yoga classes at the end of the
study. Funding sources The American study was funded by the US Government. The Austrailian
study was funded by the National Stroke Foundation (Australia). Key results We were
able to analyse study data from 69 participants. No significant benefit was found
on measures of QoL, balance, strength, endurance, pain, disability scores. No significant
benefit was found on measures of movement, although one study reported a significant
benefit in improving aspects of range of movement. One study reported a significant
benefit in reducing anxiety. Neither study reported on measures of patient harm. Quality
of the evidence We assessed the quality of the evidence using GRADE. Overall, the
quality of the evidence was very low, due to the small number of trials included in
the review, both of which we judged to be at high risk of bias, particularly in relation
to incompleteness of data and selective reporting, and especially regarding the representative
nature of the sample in one study. Conclusion The review could not identify enough
high‐quality evidence on the benefits and safety of yoga in stroke rehabilitation.
More good‐quality research studies are needed to be sure that yoga has benefits for
stroke survivors.