Emerging Technologies and Virtual Medicine in Obesity Management 2020-08-26T18:23:29-04:00

Emerging Technologies and Virtual Medicine in Obesity Management

  • The management of obesity through technological means has shown benefits in recent years. These include treatment and follow-up strategies delivered through portable devices (e.g., mobile phones), web-based platforms (e.g., websites) and wearable tracking devices (e.g., pedometers).
  • Technology-based interventions provide cost-effective, time-efficient and flexible options for the management of patients with obesity, either on their own or as an adjunct to conventional (face-to-face) care.
  • The weight-loss benefits of technology-based interventions in the management of obesity have repeatedly been proven in the literature. However, there is insufficient data comparing these interventions to conventional (face-to-face) management. This prohibits us from forming firm conclusions about their comparative benefits in the management of patients living with obesity.
  1. Implementation of management strategies can be delivered through web-based platforms (e.g., online education on medical nutrition therapy and physical activity) or mobile devices (e.g., daily weight reporting through a smartphone phone application) in the management of obesity (Level 2a, Grade B).1,2
  2. We suggest that healthcare providers incorporate individu­alized feedback and follow-up (e.g., personalized coaching or feedback via phone or email) into technology-based man­agement strategies to improve weight loss outcomes (Level 4, Grade D).3
  3. The use of wearable activity tracking technology should be used as part of a comprehensive strategy for weight loss (Level 1a, Grade A).4
  • Technology-based strategies can help you manage your health, both when used alone or when combined with con­ventional (face-to-face) obesity management approaches.
  • There are multiple options for incorporating technology into your obesity management program, including through your portable device (e.g., mobile phone), a web-based platform (e.g., website) and/or a wearable tracking device (e.g., pedometer).
  • In many cases, you may find technology-based strategies more convenient and time-efficient than face-to-face en­counters with your health care provider. We suggest you discuss with your healthcare provider which options might work best for you.


Conventional obesity management: Refers to face-to-face weight management programming that includes education regarding nu­trition, exercise and/or a behavioural change component.

Usual obesity management: Refers to the lack of active or inten­tional weight management for patients living with obesity. This in­cludes typical primary care, whereby there are no dedicated visits or education surrounding the management of obesity.


Conventional obesity management programs have been shown to be effective in achieving short-term weight reductions in patients living with obesity.5,6 Many of the conventional obesity manage­ment programs have also been shown to be cost-, labour- and time-intensive.5,7 Attempts to reduce the frequency of encounters or interactions have shown negative results in terms of obesity management and other secondary parameters, such as cardiomet­abolic risk factors other than weight.8 The challenge in obesity management is to maintain or improve upon proven programs by maintaining the supportive aspects of conventional programming that include social and clinical support, accountability and person­al feedback on a long-term basis.

Advances in technology, as well as use of technologies that have long been employed in medical care, present an opportunity to maintain the key components of conventional obesity manage­ment programming while reducing cost and provider time inputs, and improving convenience for patients, potentially resulting in improved adherence to treatment.3,4,6 Technology-based strate­gies may also overcome the barrier of inadequate training in ef­fective psychological and behavioural counselling commonly cited by primary care providers.9 Additionally, it may present an oppor­tunity to address concerns related to weight loss maintenance, as several studies have shown high rates of weight regain after initial successful short-term weight loss.10–12

The ubiquitous nature of technologies, specifically the widespread use of mobile phones, presents new opportunities for weight loss programming that can be used in an increasing subset of the pa­tient population. Mobile phone use in Canada is now estimated to include over 85% of the population.13 Access to the Internet for the use of web-based platforms is increasingly prevalent as well. New technologies are increasingly being presented for appli­cation in healthcare, although it is unclear how best to use these technologies in obesity management. Because the widespread application of technology for the purpose of remote patient care is relatively new in healthcare, more work needs to be done to de­termine the application of specific technologies for specific clinical purposes and within specific groups of patients.

The role of healthcare providers is to determine which aspects of proven conventional programs may potentially be substituted by technologies that offer convenience and cost-effectiveness, as well as to determine the ways in which technology could be used to bridge care gaps due to a lack of availability of conventional programs. Finally, conventional programs could be supplemented by the use of technologies to provide cost-containment benefits or to improve outcomes in both initial weight loss and maintenance.

Efficacy of technology in the management of obesity

Current evidence has repeatedly shown that technology-based interventions for the management of obesity may lead to signif­icant reductions in weight for patients with obesity, providing superior outcomes to usual care.1,14 The majority of studies on this topic involve follow-up ranging between six weeks to six months.1,4 Technologically based strategies include those delivered through web-based platforms, mobile devices or wearable track­ing devices. Web-based platforms that have been studied include those that provide education about nutrition and physical activi­ty, self-monitoring of goal behaviours, and goal setting, among others. Strategies delivered through mobile devices include text message advice and smartphone applications to monitor food in­take and weight. Wearable tracking devices, on the other hand, include pedometers and accelerometers.

It is important to note that, while the combination of techno­logically based management with conventional care augments weight management benefits, evidence regarding employing technological strategies as a substitute to conventional (face-to-face) programs remains inconclusive.4,14,15

A meta-analysis of 23 randomized control trials examining web-based experimental versus non-web-based controls found that the utilization of technology led to improved weight loss outcomes (-0.68 kg, p=0.03) over a period of three to 30 months.15 Secondary analyses revealed that the combination of web-based technology to conventional (face-to-face) care led to superior weight loss out­comes (-1.93 kg, 95% CI -2.71 to -1.15, p<0.001) compared with web-based strategies without face-to-face care (-0.19 kg; 95% CI -0.87 to 0.49, p=0.59), and that this difference was statisti­cally significant (p=0.003).15 Similarly, a second systematic review found that the incorporation of human contact or individualized feedback, through email or online discussion, into a web-based weight loss program led to improved outcomes.3 These findings suggest that incorporating individualized care, whether through face-to-face encounters or technological means, may provide im­proved weight loss and possibly improved obesity management.

A major downfall to many conventional programs is the high prevalence of weight regain over the long term following treat­ment.12 Due to the limited evidence and short-term follow-up of available studies, it remains to be seen whether technology-based strategies are effective in preventing weight regain and aiding with weight loss maintenance.3,16

Limitations and future directions

It is important to note that conventional programming, while having its limitations, has generally performed very well as a medical in­tervention. It is backed by strong evidence supporting its efficacy. Interventions that seek to replace this modality will need to be studied intensely and applied broadly in order to achieve results that could suggest replacing a widely accepted and rigorously proven intervention such as conventional obesity management programming.5,6

Recommendations for the use of technology in obesity manage­ment are limited by a number of factors:

  • A large proportion of studies on the topic do not implement any intervention for the control group, or use wait-list controls.1,14 This may falsely accentuate the positive effects of technology. Future studies should compare technological interventions to conventional (face-to-face) care in order to be able to form true conclusions about the potential superior benefits of technolog­ical interventions in obesity management.
  • Technology studies often implement multiple interventions in the intervention group (e.g., mobile app in tandem with a web-based program) making it difficult to decipher which intervention in particular the effects of technology may be attributed to in the study.1,14 Future studies should investigate each interven­tion in isolation in order to be able to draw strong conclusions.
  • The majority of studies on the topic have relatively short follow-up times ranging between six weeks to six months.1,4 It is import­ant that future studies allow for longer follow-up in order to be able to make conclusions surrounding weight regain and weight loss maintenance.
  • Studies evaluating the use of technology-based management in obesity suffer from methodological flaws that limit their exter­nal validity. For one, a large proportion of studies on the topic include only patients living with obesity but exclude those with other comorbidities and chronic conditions, including diabetes and hypertension. This is detrimental to the generalizability of the findings, as obesity is strongly associated with such con­ditions. Additionally, many of the trials evaluating the efficacy of technology-based management for obesity have recruited disproportionately more women than men.3 More studies eval­uating outcomes in men are needed to draw firm conclusions.
  • A large proportion of studies investigating technologically based strategies for the management of obesity exclude pa­tients that have recently engaged in obesity management pro­grams or strength and endurance training.17–19 This inevitably preselects for patients who may be less informed about obesity as a chronic disease and in whom adherence to treatment and possible benefits may be undermined.


While the evidence supports the use of technology for obesity management, it does not support the replacement of conven­tional programming.1,14 There is insufficient evidence comparing technology-based treatments for obesity management to con­ventional (face-to-face) programs, as discussed above.4,14,15 There­fore, technology-based programming may be offered in addition to conventional (face-to-face) programming or in instances where conventional care is unavailable, not feasible or less preferred by the patient.

It is clear that technologies that employ a more personalized ap­proach are superior to those that operate independent of user characteristics or feedback.3,15 Simply put, technology-based in­terventions still have to account for the personal nature that is inherent in the delivery of medical care in general.

More work will need to be done to determine which technologies are appropriate for application to obesity management and in which patient groups they will be most beneficial.

Rick Tytus MD, BSc.Phmi, Dennis Divalentino MDii, Leen Naji MDiii

i) Department of Family Medicine, McMaster University

ii) Main East Medical Association

iii) Department of Family Medicine and Department of Health Research Methods, Evidence and Impact Canada, McMaster University

A complete list of author’s competing interests can be found on the CMAJ website, HERE

Cite this Chapter

Tytus R, Divalentino D, Naji L. Canadian Adult Obesity Clinical Practice Guidelines: Emerging Technologies and Virtual Medicine in Obesity Management. Available from: https://obesitycanada.ca/guidelines/technologies. Accessed [date].

Update History

Version 1, August 4, 2020. Adult Obesity Clinical Practice Guidelines are a living document, with only the latest chapters posted at obesitycanada.ca/guidelines.

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0). For reprint and all other inquiries please contact guidelines@obesitynetwork.ca / +1-(780)-492-8361.

The summary of the Canadian Adult Obesity Clinical Practice Guidelines is published in the Canadian Medical Association Journal, and contains information on the full methodology, management of authors’ competing interests, a brief overview of all recommendations and other details. More detailed guideline chapters are published on the Obesity Canada website at www.obesitycanada.ca/guidelines.

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