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Systematic Review

The use of eHealth to promote physical activity in patients with mental health conditions: a systematic review

[version 1; peer review: 3 approved with reservations]
PUBLISHED 28 Feb 2018
Author details Author details
OPEN PEER REVIEW
REVIEWER STATUS

Abstract

Background: Achieving adequate amounts of physical activity (PA) confers important physical and mental health benefits. Despite this, individuals with mental health conditions often do not meet recommended levels of PA. eHealth, the delivery of health information through internet and mobile technologies, is an emerging concept in healthcare which presents opportunities to improve PA in people with mental conditions. The aim of this systematic review is to explore if eHealth interventions increase PA levels among individuals with mental health conditions.
Methods: Databases searched included OVID Medline, EMBASE, PsychInfo and Web of Science using a combination of key-words and medical subject headings. Articles were included if they described an eHealth intervention designed to improve PA in individuals with mental health conditions. Two reviewers screened articles for inclusion.
Results: In total 2,994 articles were identified. Seven studies met the eligibility criteria. 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 application. Three studies reported eHealth intervention significantly increased PA levels. Four studies reported that higher levels of PA resulted in improvements in mental health outcomes. 
Conclusion: eHealth interventions may be an innovative low cost method to increase PA levels which may have knock-on effects on mental health outcomes. Although 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.  Future research should evaluate this nascent technology using well designed trials.

Keywords

eHealth, technology, mental health, physical activity

Introduction

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 adults812. 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.

Methods

Study design

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).

Eligibility criteria

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.

Data sources & search strategy

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.

Selection of eligible studies

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.

Risk of bias and classification of intervention type within studies

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 extraction & analysis

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.

Results

Study selection

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.

27298cbf-c036-422e-99f4-45ddb1984db7_figure1.gif

Figure 1. PRISMA Flow diagram of study selection.

Table 1. Study methodology.

Author,
Year
CountryDesignDurationInclusion CriteriaExclusion Criteria
Beiwinkel
et al, 2016
GermanyPilot
Observational
Study
12 monthsDiagnosis of bipolar I or bipolar II disorder according to the criteria in the DSM-IV

≥18 years of age

Sufficient knowledge of the German language

Basic competence in using mobile devices
The need for inpatient treatment at the
time of recruitment
Suicidality

Diagnosis of schizophrenia or an
intellectual disability

Alcohol or drug abuse up to 6 months prior
to the study
Glozier
et al., 2013
AustraliaRCT12 weeksSelf-reported history of CVD, or risk factors for CVD, defined as any one of
the following: receiving treatment for heart attack/angina, other heart disease,
hypertension or high blood cholesterol in the past month; taking medications
for heart disease, hypertension or high blood cholesterol in the past month;
previous doctor’s diagnosis of heart disease, stroke or hypertension; previous
doctor’s diagnosis of diabetes and report taking glucose lowering therapy in
the past month; two or more of the following risk factors: current smoker, obese
(BMI>30), aged 65 years or more, family history of heart disease or stroke in two
or more first degree relatives, all of which are well established risk factors for
CVD

Psychological distress at recruitment to the health survey, defined with a
high sensitivity as a Kessler-10 (K-10) score of greater than or equal to 16.
This screening score reflects distress six months to three years prior to trial
recruitment

Provided an email address established as previously valid through 45 and Up
Study checking processes
N/R
Kerr
et al., 2008
USAPilot Study12 weeksEnglish speaking men and women, aged 25–65 years, with newly diagnosed or
recurrent mild-to-moderate depression (PHQ-9 score
15 or greater at screening)

Doctor approved prescription of escitalopram (Lexapro)

Telephone and internet access at home

Ability to participate in mild- to moderate-intensity physical activity (PAR-Q)

Willingness to participate in all study components
Individuals currently receiving
psychotherapy for their depression from a
psychiatrist or psychologist and those at
high risk for suicide as assessed by the
PHQ-9 suicide item.
Mailey
et al., 2010
USAPilot RCT10 weeksBe registered for and receiving mental health counselling services

A student at the university

Able to participate in physical activity without exacerbating a pre-existing
condition

Access to a personal computer with internet connection.
N/R
Naslund
et al., 2016
USAObservational
Cohort Study
6 months≥21 years old

Serious mental illness defined by an axis I diagnosis of schizophrenia,
schizoaffective disorder, major depressive disorder, or bipolar disorder

Speaks English

On stable pharmacological treatment defined as receiving the same psychiatric
medications over the prior 2 months

Obesity (BMI ≥30).
Participants were excluded if they had any
medical contraindication to weight loss
Pregnant or planning to become pregnant
within the next 6 months

Current diagnosis of an active alcohol-use
or substance-use disorder
Shin
et al., 2016
South
Korea
Observational
Cohort Study
9 daysPatient had to be hospitalized with chronic schizophrenia in a closed ward

Be involved in ordinary activity in a regular psychiatric treatment program

Agree to wear an activity tracker and keep it continuously for a week
Patients who were restricted from outdoor
activity
Patients with severe medical conditions
affecting physical activity
Patient with conditions such as akathisia,
delirium, idiopathic or drug induced
Parkinsonism and epilepsy

Patients who lacked an understanding of
this study due to psychiatric symptoms or
moderate intellectual disability
Ström
et al., 2013
SwedenRCT9 weeksMild to moderate major depression diagnosis

A sedentary lifestyle
Subclinical depressive symptoms, severe
depressive symptoms, dysthymia as a
primary diagnosis, elevated suicide risk

High levels of physical activity prior to
treatment

Recent changes in medication

Somatic illness making physical exercise
inappropriate

BMI: Body Mass Index, DSM-VI: Diagnostic and Statistical Manual of Mental Disorders 4th edition, N/R: Not reported, PHQ-9: Patient Health Questionnaire-9.

Participant characteristics

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.

Table 2. Participant characteristics.

Author, yearParticipantsAge: Mean (SD)
years
Sex (Baseline)Mental Health Conditions: Number of
participants (Percentage)
Beiwinkel et al, 201614

(0 drop-outs)
47.2 (3.8) Male: 8
Female: 5
Bipolar disorder: 13 (100%)
Glozier et al., 2013562

(75 drop-outs)
IG: 57.5 (6.6)

CG: 58.4 (6.6)
IG: Female, 173
(61.8%)

CG: Female, 172
(61.0%)
Mild-moderate depression: 487 (100%)
Kerr et al., 200836

(13 drop-outs)
44.1 (9.8)Males: 9 (25%)

Females: 27 (75%)
Depression: 36 (100%)
Mailey et al., 201047

(4 drop-outs)
25 (range 18–52)

Not separated by
groups
Females: 32 (68.1%)

Males: 15 (32%)

Not separated by
groups
N/R
Naslund et al., 201643

(9 drop-outs)
50.2 (11.0)Female: 21 (61.8%)

Male: 13 (38.2%)
Schizophrenia spectrum disorders: 8
(23.5%)

Major depressive disorder: 17 (50.0%)

Bipolar disorder: 9 (26.5%)
Shin et al., 201661

(0 drop-outs)
46.59 (8.40)Males: 35 (52.4%)

Women: 26 (42.6%)
Schizophrenia: 61 (100%)
Ström et al., 201348

(0 drop-outs)
Total: 49.2 (10.7)

IG: 48.8 (12.7)

CG: 49.6 (8.7)
Total: Female = 40;
Male = 8

IG: Female = 20;
Male = 4

C: Female = 20;
Male = 4
Mild to moderate depression: 48
(100%)

CG: Control group, IG: Intervention group, N/R: Not reported

Risk of bias of included studies

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).

Table 3. Risk of Bias of included studies.

AuthorCochrane
Risk of Bias
Downs and
Black Risk
of Bias
Beiwinkel et al., 2016-11/18
Glozier et al., 2013Low-
Kerr et al., 2008-17/20
Mailey et al., 2010Unclear-
Naslund et al., 2016-19/20
Shin et al., 2016-16/17
Ström et al., 2013Unclear-

Study design

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.

Physical activity assessment

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 conditions2326. 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).

Table 4. Physical activity outcomes.

Author,
year
Intervention (IG) and
control group (CG)
Physical activity outcomes and result
How PA recordedMethod of PA quantificationBaseline and end-intervention PA results: Mean (Standard
Deviation) unless otherwise stated.
Beiwinkel
et al., 2016
IG: Physical activity recorded
over 12 months in 13
participants with bipolar
disorder

CG: N/A
Smartphone. Three
smartphone sensors
were used to measure
physical activity.


GPS for the distance
travelled per day, cell
tower movement
as an indicator of
location changes,
and accelerometer
to measure the users’
device activity)
GPS, distance travelled (km)

Cell tower changes

Device activity, % of day
Mean levels

Distance travelled (km): 10.5 (41.5)

Cell tower changes: 10.5 (17.0)

Device activity, % of day: 7.3 (8.2)

Between-patient analysis

Distance travelled as measured by the GPS signal had a
significant negative relationship with clinical manic symptoms
(YMRS: beta=-.37, P<.001).

Within-patient analysis

An increase in cell tower movement was negatively related
to both manic symptoms (YMRS: beta=-.17, P<.001) and
depressive symptoms (HAMD: beta=-.11, P=.03)
Glozier
et al., 2013
IG: 12 weeks of internet
delivered cognitive
behavioural therapy

CG: 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
IPAQThe average time spent walking per day
and a composite measure of undertaking
enough exercise to provide a health
benefit (defined as at least 150 mins of
activity over 5 or more occasions each
week)
Post-intervention

Activity sufficient to confer a health benefit post
intervention (150 mins over 5 occasions/week)

IG: N=136 (67%)

CG: N=165 (61%) (Odds Ratio 1.91, 95%CI: 1.01–3.61),



Average walking time per day

0-14 mins per day, IG: N=78 (38%), CG: N=116 (43%)

15-29 mins per day, IG: N=47 (23%), CG: N=64 (23%)

30+ mins per day, IG: N=79 (39%), CG: N=92 (34%)

(Odds ratio = 1.46, 95% CI: 0.81–2.62)
Kerr et al.,
2008
IG: A community based
physical activity intervention
(involving internet, telephone,
and pedometer support),
integrated with medication
and mood management for
depressed patients

CG: N/A
PedometerSteps per dayAll participants (n=36)

Daily step count: Mean (SE)

Baseline: 6604.1 (883.6)

6 weeks: 8558.8 (868.8)

12 weeks: 9053.3 (818.1)

Sedentary behavior: Mean (SE)

Baseline: 62.2 (5.0)

6 weeks: 58.9 (4.2)

12 weeks: 57.6 (4.2)

Completers only (n=23)

Daily step count: Mean (SE)

Baseline: 6656.2 (1618.7)

6 weeks: 8903.2 (1665.2)

12 weeks: 8550.0 (1374.4)

Sedentary behavior: Mean (SE)

Baseline: 63.4 (6.3)

6 weeks: 58.9 (4.3)

12 weeks: 56.8 (4.4)
Mailey
et al., 2010
IG: An internet-based
physical activity intervention
on physical activity, self-
efficacy, depression, and
anxiety in college students
(n=23) receiving mental
health counselling

CG: Standard mental health
care (n=24)
Actigraph accelerometerTotal daily activity score

Daily totals were averaged across five
days of continuous activity
Physical activity pre-intervention

IG: 243421.81 (62414.56)

CG: 247753.55 (69613.96)

Physical activity post-intervention

IG: 299791.57 (102800.00)

CG: 251625.04 (83080.77)

A significant main effect for time with both conditions
increasing their physical activity levels across the 10-week
period, p=0.04.
Naslund
et al., 2016
IG: Daily step count
measured using Fitbit
wearable devices to
improve weight loss and
fitness among individuals
with serious mental illness
enrolled in a 6-month lifestyle
programme

CG: N/A
FitbitSteps per dayParticipants achieved an average of 4453.5 (SD = 2707.4)
steps each day

Average daily step counts ranged from 1037.6 (SD = 767.9)
steps to 11,366.3 (SD = 3416.9) steps.

21 (61.8%) participants achieved 10,000 steps or more on at
least one day.

There was a significant association between participants’
average daily step count and weight loss.

For every 1000 step increase in participants’ daily average
step count, they experienced a decrease in weight of 1.78
pounds (F = 5.07; df = 1, 32; p = 0.0314)
Shin
et al., 2016
IG: Measure physical
activity using an mHealth
device correlations with
psychopathology in
participants with chronic
schizophrenia

CG: N/A
FitbitSteps per dayMean daily activity: 12,649.21 ± 5883.99 steps/day.

Range: 3612 – 29,663 steps/day

Significant correlations were found between daily activity and
PANSS positive, general and total subscale.

Activity levels (steps per day)

PANSS-positive; -0.508 (p<0.001)

PANSS-negative; -0.356 (p=0.005)

PANSS-general; -0.39 (p=0.002)

PANSS-total; -0.459 (p<0.001)

PANSS 5-factor positive; -0.495 (p<0.001)

PANSS 5-factor negative; -0.445 (p<0.001)

PANSS 5-factor disorganisation; - 0.362 (p=0.004)
Ström
et al., 2013
IG: Internet based therapist
delivered self-help
programme

CG: Waiting list
IPAQTotal MET (Metabolic equivalent of task)
per week
IPAQ

IG:

• Pre: 778 (695)
• Post: 1331 (990)
• 6-months: 1282 (1255)

CG:

• Pre: 953 (670)
• Post: 1143 (918)
• 6-months: N/a

Physical activity increased in both groups, no significant
difference between two groups

HAMD; Hamilton Depression Scale, IG; Intervention Group, IPAQ; International Physical Activity Questionnaire, CG; Control Group, PA; Physical Activity, PANSS; Positive and Negative Syndrome Scale, YMRS; Young Mania Rating Scale. Data is presented as mean (standard deviation) unless otherwise stated

eHealth interventions and control treatments

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.

Table 5. Features of E-Health intervention.

Author,
year
Platform for
intervention
App /
software
PersonalisationBehaviour change
theory
PA Reporting
by user
InteractionFeedback
Web appMobile appEmailWebYesNoSCTTTMTheory of Goal
Setting
CBTTypeDurationIntensityReal-timeAutomated
reminders
TelEmailPushSMS
Beiwinkel
et al., 2016
-X--SIMBAX-----X-----X-
Glozier
et al., 2013
---XE-couch and
Healthwatch
-X---X-X-XXX---
Kerr
et al., 2008
--X--X-X--XX-X-XX--
Mailey
et al., 2010
---XIPACSX-X---XXX--X--
Naslund
et al., 2016
-X--Fitbit-X--XXX-X----X
Shin
et al., 2016
-X-XFitbitX-----XX-------
Ström
et al., 2013
---X-X----XXX-X--X--

CBT; Cognitive Beahvioural TherapIPACS; Internet Physical Activity for College Students, SIMBA; Social Information Monitoring for Patients with Bipolar Affective Disorder, SCT-Social Cognitive Theory, TTM-Trans Theoretical Model

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.

Discussion

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 activity2830. 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.

Conclusion

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.

Data availability

All data underlying the results are available as part of the article and no additional source data are required.

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Moran J, Kelly G, Haberlin C et al. The use of eHealth to promote physical activity in patients with mental health conditions: a systematic review [version 1; peer review: 3 approved with reservations]. HRB Open Res 2018, 1:5 (https://doi.org/10.12688/hrbopenres.12796.1)
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ApprovedThe paper is scientifically sound in its current form and only minor, if any, improvements are suggested
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Reviewer Report 05 Apr 2018
Helen P. French, School of Physiotherapy, Royal College of Surgeons in Ireland, Dublin, Ireland 
Approved with Reservations
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Thank you for the opportunity to review this review on a topical and relevant issue. The review appears to have been well conducted but there are some flaws which should be addressed. My comments below are designed to enhance the ... Continue reading
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French HP. Reviewer Report For: The use of eHealth to promote physical activity in patients with mental health conditions: a systematic review [version 1; peer review: 3 approved with reservations]. HRB Open Res 2018, 1:5 (https://doi.org/10.21956/hrbopenres.13856.r26161)
NOTE: it is important to ensure the information in square brackets after the title is included in all citations of this article.
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Reviewer Report 15 Mar 2018
Jennifer M. Ryan, Department of Epidemiology and Public Health Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland;  Department of Clinical Sciences, Brunel University London, Uxbridge, UK 
Approved with Reservations
VIEWS 36
This systematic review aims to investigate the effectiveness of eHealth to increase physical activity (PA) among individuals with mental health conditions. This review is on an important topic and the authors provide a timely summary of the evidence. 

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Ryan JM. Reviewer Report For: The use of eHealth to promote physical activity in patients with mental health conditions: a systematic review [version 1; peer review: 3 approved with reservations]. HRB Open Res 2018, 1:5 (https://doi.org/10.21956/hrbopenres.13856.r26070)
NOTE: it is important to ensure the information in square brackets after the title is included in all citations of this article.
  • Author Response 12 Jul 2018
    Julie Broderick, Discipline of Physiotherapy, Trinity College Dublin, University of Dublin, Dublin, D08 W9RT, Ireland
    12 Jul 2018
    Author Response
    We would like to very much thank the reviewer for her insightful comments
    Competing Interests: No competing interests were disclosed.
COMMENTS ON THIS REPORT
  • Author Response 12 Jul 2018
    Julie Broderick, Discipline of Physiotherapy, Trinity College Dublin, University of Dublin, Dublin, D08 W9RT, Ireland
    12 Jul 2018
    Author Response
    We would like to very much thank the reviewer for her insightful comments
    Competing Interests: No competing interests were disclosed.
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Reviewer Report 08 Mar 2018
Olive Lennon, School of Public Health, Physiotherapy and Sports Science, University College Dublin, Dublin, Ireland 
Caitriona Cunningham, School of Public Health, Physiotherapy and Sports Science, University College Dublin, Dublin, Ireland 
Approved with Reservations
VIEWS 41
This systematic review explores the available evidence to support ehealth technology (utilising internet and mobile technologies) as a stand-alone intervention or as part of a multimodal intervention to increase physical activity in individuals with mental health conditions. The introduction addresses ... Continue reading
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Lennon O and Cunningham C. Reviewer Report For: The use of eHealth to promote physical activity in patients with mental health conditions: a systematic review [version 1; peer review: 3 approved with reservations]. HRB Open Res 2018, 1:5 (https://doi.org/10.21956/hrbopenres.13856.r26071)
NOTE: it is important to ensure the information in square brackets after the title is included in all citations of this article.
  • Author Response 12 Jul 2018
    Julie Broderick, Discipline of Physiotherapy, Trinity College Dublin, University of Dublin, Dublin, D08 W9RT, Ireland
    12 Jul 2018
    Author Response
    We would very much like to thank the reviewers for their insightful comments
    Competing Interests: No competing interests were disclosed.
COMMENTS ON THIS REPORT
  • Author Response 12 Jul 2018
    Julie Broderick, Discipline of Physiotherapy, Trinity College Dublin, University of Dublin, Dublin, D08 W9RT, Ireland
    12 Jul 2018
    Author Response
    We would very much like to thank the reviewers for their insightful comments
    Competing Interests: No competing interests were disclosed.

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Version 3
VERSION 3 PUBLISHED 28 Feb 2018
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Alongside their report, reviewers assign a status to the article:
Approved - the paper is scientifically sound in its current form and only minor, if any, improvements are suggested
Approved with reservations - A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit.
Not approved - fundamental flaws in the paper seriously undermine the findings and conclusions

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