Keywords
eHealth, technology, mental health, physical activity
eHealth, technology, mental health, physical activity
Physical activity (PA) is associated with a number of health related benefits such as improved cardiovascular health, bone strength, and a reduced risk of developing chronic conditions such as colorectal and breast cancers, cardiovascular disease, and Type II diabetes1,2. In addition, the benefits of PA among individuals with mental health conditions extend beyond physical health benefits and include improved mood and sleep, reduced stress, and enhanced self-esteem3,4. Despite the numerous physical and mental benefits of PA, insufficient levels are prevalent among individuals with mental health conditions5,6. The low levels of PA among this population and potential mental and physical health gains make a strong case to explore innovative and effective ways to improve PA levels.
eHealth is a relatively new concept in healthcare which may present unique opportunities to improve PA levels. The World Health Organisation (WHO) defines eHealth as the transfer of health resources and health care by electronic means, including, but not limited to the delivery of health information through the internet and mobile technologies. The implementation of internet technology in health-care provides a number of benefits such as convenience for users, easy storage of large amounts of information, ease of updating information, and ability to provide personalized feedback7. eHealth interventions have been extensively studied in a number of populations ranging from cancer survivors to community dwelling adults8–12. Systematic review evidence has consistently supported the effectiveness of eHealth interventions to increase PA levels.
To our knowledge, no systematic review has synthesised the literature on eHealth interventions to increase PA for people with mental health conditions. To address this gap, the objective of this systematic review was to investigate the effectiveness of eHealth interventions to increase PA among individuals with mental health conditions.
This systematic review was conducted to identify eHealth interventions with a primary or secondary aim to increase PA in individuals with mental health conditions. The “Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA)”13 and the criteria outlined in “A Measurement Tool to Assess Systematic Reviews (AMSTAR) checklist”14 guidelines were followed in drafting this review (PRISMA checklist in Supplementary File 1). The protocol outlining the planned search strategy and method of analysis for this review was registered online and is available on PROSPERO, a registry of systematic reviews (CRD42017068834).
Experimental studies and observational studies, with or without controls, were eligible for inclusion if they evaluated an eHealth-based intervention (internet and mobile technologies) delivered to participants with mental health conditions which included PA as a primary or secondary outcome measure. Single eHealth interventions or multi-modal interventions in conjunction with eHealth were included. Studies were excluded if only telephone calls, SMS or conference calls were used, as these are not considered eHealth interventions. Review articles, case studies and letters to the editor were also excluded.
PA is a complex multi-dimensional construct measured through objective (e.g. indirect calorimetry, accelerometers, pedometers) or self-report methods (e.g. questionnaire, log)15. Domains of PA can be considered on a continuum from light activity (e.g. slow walking) through to moderate level activity (e.g. brisk walking) and vigorous activity (e.g. jogging). Sedentary behaviour consists of low levels of activity, similar to resting (e.g. sitting or lying down)16. There are many different ways of quantifying PA. We included the following methods of measuring PA, but not limited to the following; MET-minutes.week-1, minutes in light, moderate and/or vigorous PA per week, and meeting/not meeting PA guidelines (150 minutes per week of moderate/vigorous activity)17. All methods of measuring PA were included e.g. self-report, objective or direct measures.
An experienced medical librarian was consulted and a comprehensive search strategy was developed with all keywords and subject headings included (DM). The search strategy consisted of a search of four electronic databases: OVID Medline, EMBASE, PsychInfo, and Web of Science. Search terms included keywords and medical subject headings adapted for each database. These related to three categories: 1) the condition (e.g. ‘mental health’ ‘depression’, ‘bipolar disorder’, ‘schizophrenia’ and ‘anxiety disorder’), 2) technology (e.g.‘teleHealth’, ‘telerehabilitation’, ‘mobile health’, ‘Mhealth’, ‘eHealth’, ‘e-health’, ‘mobile technology’, ‘smartphone’), and 3) PA (e.g. ‘exercise’, ‘physical activity’, ‘exercise therapy’, ‘physiotherapy’). There was no limit placed on the year published as it was believed that the search strategy would produce only articles published within the last ten years, due to the relatively novel nature of this technology. Databases were searched until August 2017. The bibliographies of all included studies were examined to identify further studies. The search strategy is available in Supplementary File 2.
Two researchers (JM and GK), independently screened titles and abstracts to identify studies that met the eligibility criteria. Any disagreements between researchers were discussed and if a consensus could not be reached a third researcher (JB) intervened. All full-texts were retrieved and examined in detail to assess for inclusion in this review.
Two researchers (JM and GK) independently appraised the risk of bias of included studies; any disagreements were resolved through discussion. The Downs and Black checklist was used to assess the risk of bias of all included observational studies18. This checklist contains 27 items, with a maximum possible score of 32 points. The final score is variable as some items of the checklist may not be applicable and can be excluded. In addition, the Cochrane Collaboration’s tool19 was used to assess risk of bias for each RCT. Risk of bias was assessed in the following six areas; sequence generation (randomisation); allocation concealment; blinding of participants, personnel and investigator; incomplete data (e.g. losses to follow-up, intention-to treat analysis); selective outcome reporting; and other possible sources of bias.
Data was extracted by two researchers (JM and GK) onto standardised data abstraction forms. Any disagreements were discussed, if a consensus could not be reached, a third member of the research team (JB) arbitrated. The standardised data extraction form was piloted on two randomly selected studies and modified accordingly. Data was extracted using the following headings: methods, allocation, blinding, duration, design, setting, participants, diagnosis, age, sex, inclusion criteria, exclusion criteria, intervention, control group, primary outcomes, secondary outcomes, results in PA outcomes, results in secondary outcomes.
A quantitative synthesis of included data was planned, but was deemed inappropriate due to the heterogeneity of study design, participants, interventions and outcomes. Consequently, a qualitative synthesis of study interventions and results was completed. A number of sub-group analyses were planned, including comparing self-report and objectively measured PA and intervention focus such as smart phone applications vs. web-based interventions. Due to insufficient data in included studies these comparisons could not be completed.
The PRISMA flow diagram outlines study selection (Figure 1). A total of 2,994 articles were retrieved and 191 duplicates were removed. Following title and abstract screening, 2,728 articles were excluded leaving 75 full-text articles to be screened. Ultimately, seven articles were included in this review. Types of studies were mixed, including RCTs (n=3) and observational studies (n=4). Table 1 describes the methodological features of included studies.
Participant characteristics are summarised in Table 2. A total of 811 participants were recruited with 102 dropping out. Ultimately, 709 particpants 7 were analysed across seven studies. The majority of participants analysed had depression (n=588). The remaining mental health conditions included; schizophrenia or schizophrenia spectrum disorders (n=69) and bipolar disorders (n=22). One study did not report the specific diagnoses of mental health conditions included20.
Risk of bias of all included studies is noted in Table 3. The Cochrane Collaboration’s tool19 was used to evaluate the risk of bias of the three included RCTs. Two studies were ranked as having an unclear risk of bias20,21, while the remaining RCT had a low risk of bias22. The Downs and Black checklist assessed the risk of bias of the remaining observational studies (n=4).
Included studies were varied in design, likely reflecting this emerging research field. Three studies compared an eHealth intervention to a control group. The remaining studies (n=4) used an eHealth intervention to measure physical activity in participants with mental health conditions. Mobile technologies such as smartphones and the Fitbit were used to measure physical activity levels and predict clinical signs and symptoms of mental health conditions such as mood. The length of interventions ranged from 9 days to 12 months23,24, with the majority of studies not assessing physical activity post-study completion. Only one study assessed maintenance at 6 months post-baseline21.
Objective methods of measuring physical activity included smartphones (GPS, cell tower movement and accelerometer data)24, wearable technologies (Fitbit)23,25, accelerometers20 and pedometers26. The remaining studies (n=2) used the IPAQ to subjectively measure PA21,22.
Four studies used eHealth interventions to measure physical activity in participants with mental health conditions23–26. Higher levels of PA as measured using eHealth are associated with less manic symptoms as measured using the Young Mania Rating Scale (YMRS) in participants with bipolar disorder (YMRS: beta=-.37, p<0.001)24. In addition, a decline in physical activity participation was reported to be predictive of an increase in depressive symptoms. In participants with schizophrenia, daily PA levels as measured by an eHealth device (Fitbit Flex®), showed a significant association with positive (steps per day: -0.508, p<0.001), general (steps per day: -0.39, p=0.002) and total (steps per day: -0.459, p<0.001) scores measured using the Positive and Negative Syndrome Scale (PANSS)23.
eHealth interventions were shown to increase physical activity participation in participants with depression26. Kerr and colleagues reported daily step count significantly increased from baseline (Mean: 6604.1 (SE: 883.6)) to 12 weeks (Mean: 9053.3 (SE: 818.1)) in 36 participants with depression. In addition, sedentary behaviour reduced from baseline to 12 weeks, however, this did not reach significance (Table 4). Naslund and colleagues reported a significant association between participants’ average daily step count and weight loss25. For every 1000 step increase in daily average step count, participants experienced a decrease in weight of 1.78 pounds (F=5.07; df=1, 32; p=0.0314).
A variety of eHealth platforms designed to increase PA were described in these studies; web-based (n=4), web and mobile application (n=3) and e-mail-based (n=1), one study used both a web-based and mobile application23. A breakdown of each technological intervention is detailed in Table 5 below.
eHealth interventions included internet delivered cognitive behavioural therapy (CBT)22. An internet-based physical activity intervention and an internet based therapist delivered self-help programme20,21. Control treatments included standard care20, waiting list care21 and an active control group22. Participants in the active control group underwent a 12 week online programme that delivers health information on topics including nutrition, stroke, physical activity, medicines in the home, blood pressure and cholesterol, and heart health.
All experimental studies (n=3) reported eHealth interventions significantly increased PA levels from baseline, however, it is unclear if eHealth interventions are superior to traditional mental health services at increasing PA. Glozier and colleagues reported a greater proportion of participants with mild-moderate depression (n=487) engaging in the recommended levels of physical activity (≥150 mins a week) who performed internet based cognitive behavioural therapy (ICBT) compared to the control group (67% in ICBT vs 61% in control group, Odds Ratio: 1.91, 95% CI: 1.01–3.61). In contrast two studies reported that there was no significant differences in physical activity levels between eHealth interventions and control treatments. Mailey and colleagues noted an increase in PA in both the intervention and control group, however, there was a larger increase in mean PA in the intervention group (Pre: 243421.81 vs. Post: 299791.57, d=0.68) compared to the control group (Pre: 247753.55 vs. Post: 251625.04, d=0.05) as measured using the Actigraph accelerometer. Furthermore, Ström and colleagues noted PA significantly increased in both the intervention and control groups, however, there was no significant difference between the eHealth and waiting list control group.
This systematic review comprehensively searched and evaluated the effect of eHealth interventions on PA levels in participants with a range of mental health conditions. Overall, eHealth interventions appear to be feasible to use, although consistent increases in PA were not demonstrated across all studies. Importantly perhaps, higher levels of physical activity were associated with improvements in clinical signs and symptoms of mental health conditions (e.g. mood) in two studies23,24. Although beneficial in increasing PA levels, it is currently unclear if eHealth interventions are superior to traditional care at increasing physical activity as results are inconsistent.
Glozier and colleagues noted a greater proportion of participants achieved the recommended levels of physical activity (≥150 mins a week) in favour of the e-health intervention compared to the control group (67% in ICBT vs 61% in control group, Odds Ratio: 1.91, 95% CI: 1.01–3.61). The risk of bias as measured using the Cochrane collaboration tool ranked this study as low. In contrast, two studies comparing eHealth interventions to control treatments reported no significant differences between the intervention and control arms in terms of PA, however both of these studies had an unclear risk of bias20,21. In addition, both of these studies had much smaller sample sizes compared to the study by Glozier and colleagues which was notably much larger in size (n=487) compared to other studies included in this review. It should be noted however that Glozier and colleagues employed a subjective measure of physical activity, the IPAQ, compared to the more reliable objective measure of PA, the Actigraph accelerometer used by Mailey and colleagues. This limits the interpretability of these results and raises the likelihood of results being influenced by bias.
Subjective methods of measuring PA are more prone to error compared to objective measures such as pedometers and accelerometers27. Subjective measures of PA raise the likelihood of self-report bias influencing results as participants are instructed to think about PA. Furthermore, subjective measures are liable to recall bias, further limiting the interpretability of these results. eHealth technologies such as smartphones and wearable technology (i.e. Fitbit) demonstrate good validity and reliability at measuring physical activity and have been noted to improve patient motivation to partake in physical activity28–30. The use of such tools may limit the influence of bias and other factors associated with subjective measures of PA15.
eHealth technologies are rapid and constantly evolving through continuous software and hardware updates that regularly outpace medical research. The RCT is widely regarded the gold-standard of experimental research, however the mean duration from enrolment to publication is 5.5 years31. eHealth technologies are likely to become obsolete within this time-frame. A call has been made for medical research to evolve and adapt to maintain pace with developments in eHealth32. The Continuous Evaluation of Evolving Behavioural Intervention Technologies (CEEBIT) methodological framework has been proposed as an alternative to the conventional RCT design33. It is statistically powered to continuously valuate eHealth applications throughout the study duration while accounting for updates to the application. Therefore, future eHealth interventions should consider using this novel methodological framework specific to the ever evolving eHealth technologies.
Further research is required to make a judgement of the ability of eHealth interventions to increase physical activity in people with mental health conditions. A recent systematic review showed that drop-out rates from exercise trials in people with depression are lower when delivered by a health professional with specific training in exercise prescription34. The need for qualified personnel to supervise PA programmes for people with schizophrenia was also echoed in a review by Vancampfort (2016)35. Drop-out rates of the PA arm of randomised controlled trials in people with schizophrenia was reported to be 26.7%35. Amalgamated drop-out rates for the current review show a lower drop-out rate of 12.5% but this may be reflective of the mixed mental health population with the majority having mild-moderate depression. It is not known whether the remotely delivered nature of eHealth interventions may result in less or more efficacious outcomes than traditionally delivered programmes. Head-to-head comparisons between these intervention mediums are necessary to elucidate the relative benefits of each.
Previous reviews in other clinical populations such as cancer survivors have reported that the initial results of eHealth technologies to increase physical activity in the cancer rehabilitation setting are promising36. However, similar to this review, weaknesses in methodological quality and uses of subjective measures of PA limit the interpretability of these findings.
Perhaps due to this nascent field of research, the methodological quality of the included studies is low. This review has a number of suggestions to improve the methodological quality of studies examining eHealth interventions and physical activity participation among mental health populations. Future studies should use objective measures of physical activity, including but not limited to pedometers, accelerometers and wearable technology. In addition, eHealth interventions should adhere to improved reporting of interventions, to ensure that such interventions can be repeated. Follow-up times in this review have varied from 9 days-12 months, with the majority of studies not recording PA levels in the maintenance phase. Therefore, the long-term implications of eHealth technologies to increase PA in a mental health population should be explored.
eHealth interventions appear feasible for people with mental health conditions and may improve PA levels and mental health symptoms. Even though some of the included studies in this review demonstrated promising results, methodological restrictions and potential biases from using subjective measures of PA limit the interpretability of these results. Currently, it is unclear if eHealth interventions are superior compared to traditional interventions methods to increase PA. Larger well designed studies are needed to extensively evaluate the true potential of this medium.
All data underlying the results are available as part of the article and no additional source data are required.
Health Research Board Ireland [CFT-2014-880].
The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Supplementary File 1: PRISMA Checklist.
Click here to access the data.
Supplementary File 2: Search strategies for all databases.
Are the rationale for, and objectives of, the Systematic Review clearly stated?
Yes
Are sufficient details of the methods and analysis provided to allow replication by others?
Yes
Is the statistical analysis and its interpretation appropriate?
Partly
Are the conclusions drawn adequately supported by the results presented in the review?
Partly
Competing Interests: No competing interests were disclosed.
Are the rationale for, and objectives of, the Systematic Review clearly stated?
Yes
Are sufficient details of the methods and analysis provided to allow replication by others?
Partly
Is the statistical analysis and its interpretation appropriate?
Not applicable
Are the conclusions drawn adequately supported by the results presented in the review?
Partly
Competing Interests: No competing interests were disclosed.
Are the rationale for, and objectives of, the Systematic Review clearly stated?
Partly
Are sufficient details of the methods and analysis provided to allow replication by others?
Yes
Is the statistical analysis and its interpretation appropriate?
Yes
Are the conclusions drawn adequately supported by the results presented in the review?
Partly
Competing Interests: No competing interests were disclosed.
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