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Founded on
Science and Research

Every EXI prescription is based on the latest clinical evidence and guidelines including the World Health Organization (WHO), National Institute for Health and Care Evidence (NICE), American College of Sports Medicine (ACSM) & Exercise is Medicine®.

Instantly collating and applying pertinent evidence and data for each individual, EXI is the SaMD – software as a medical device – that delivers safe, effective, personalised physical activity prescriptions.

Physical Activity work

There is overwhelming evidence that any physical activity is beneficial for both physical and mental health. Additionally, for individuals with long-term health conditions, there is global scientific and medical consensus that the benefits of increasing physical activity far outweigh the risks. As a result, a progressive activity programme that’s tailored to individual health and fitness conditions – incorporating aerobic and strengthening exercises and reducing sedentary time – is recommended by every major health body as a safe, effective strategy to reduce morbidity and mortality and improve quality of life for those with long-term conditions.

Digital Interventions work

Not only are digital interventions highly scalable, they are also perceived by multiple populations to be both useful and acceptable. Systematic reviews of digital interventions indicate that physical activity levels, motivation and intention to exercise – as well as awareness of physical activity goals – all increase following the use of apps to support behaviour change. Further systematic review evidence shows that interventions using physical activity tracking are safe and effective at increasing physical activity at a clinically significant level, across a wide range of age groups and clinical and non-clinical populations.

EXI works

We explore the latest theoretical perspectives and cutting-edge research to identify clusters of behaviour change techniques that are shown to be most effective in changing behaviour and engaging individuals with digital interventions. We build these into EXI to maximise adherence and positive health outcomes.

Developing evidence

We partner with healthcare providers and academic institutions to demonstrate the clinical and economic impact of EXI.

Where we are not bound by a confidentiality agreement, we are happy to share high-level details of the studies.

Created by experts, backed by science

Our expert team rigorously examine the most up-to-date evidence and clinical guidance and embed it within the EXI platform. This is combined with analysis and application of powerful behaviour change techniques to maximise adherence and positive health outcomes.

Dr Brendon Stubbs

Clinical exercise science

Dr Kristina Curtis

Behavioural science in mobile health

Dr Venktesh Ramnath

Medical practice & telemedicine

Sir Muir

Public health & evidence-based medicine

Dr Lou Atkinson

Applied healthcare research

Review The Evidence

Helping millions to accelerate the achievement of a healthy and sustainable weight.

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Everyone Active use EXI for GP Referral Scheme

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EXI Obesity Best Practice Guide

EXI retrospective data analysis for users with Obesity + best practice implementation guide June 2023

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EXI retrospective data analysis for
users with Type 2 Diabetes + best
practice implementation guide

EXI retrospective data analysis for users with Type 2 Diabetes + best practice implementation guide June 2023

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Evaluation of the EXI mobile app in the provision of Physical Activity to a Multidisciplinary Weight Management Clinic

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EXI Poster for the British Society of Lifestyle Medicine

EXI Poster Presented at the British Society of Lifestyle Medicine Annual Conference 2023

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EXI Poster for the Association for the Study of Obesity

EXI Poster Presented at the Association for the Study of Obesity UK Congress 2023

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Clinical results that can scale:

We’re committed to ongoing trials and research, continually strengthening our evidence base in partnership with multiple clinical and academic institutions. We’re proving that digital prescription of physical activity is an exact science: a targeted yet scalable means to improve population health.

In clinical trials, results achieved by EXI members after 12 weeks include:

If physical activity were a drug, we would refer to it as a miracle cure, due to the great many illnesses it can prevent and help treat.

UK Chief Medical Officers

The information on the patients was really fascinating and a useful tool to identify the [people] motivated, ambivalent or not ready to make a lifestyle change.  What they say in the consultation and what they then do after enrolling in the programme is so useful to me, so I know which tactic I need to adopt when I next speak to them, whether that is putting on the brakes and working them up more or stepping on the gas for those in a determined place.

Dietician at Barts Hospital

EXI is a good conscience on my shoulder. It allows me to monitor what I am doing, and the linked GPS tracker is really handy to know how far I have walked. Thank you for your encouragement, the messages are rewarding and make you reflect how to go beyond a bronze star. With leukemia and reactive arthritis, I need a bit of a push, but I also need to watch myself!

EXI member

I have found EXI very straightforward to use and it has definitely made me more active. The app also links with other apps so any other activity you do shows in EXI. Keeping a track on all your stats is very handy as you see a week-by-week account of where you are. Motivational messages on your activity target are really good as it does give you a little buzz to carry on.

EXI member

To say that EXI has changed my life is an understatement. 19 weeks ago, I was overweight and incredibly unfit. Then I joined EXI and was hooked. Having a workout plan tailored to me has been a crucial part of my success.  Knowing that my health issues are being factored in gave me the confidence to throw myself into this. If you’re considering downloading an exercise app, I strongly recommend this one.

EXI Member


A real world evaluation of the implementation of EXI into existing multi-disciplinary weight management services for severe obesity. A study run collaboratively by EXI and Barts & Bedfordshire NHS Trusts

This is a pragmatic evaluation seeking to capture the impact of EXI when deployed in the real world. Hence there is no control group, as all patients were offered EXI. The primary outcomes are change in steps and activity minutes over 12 weeks, but we are also looking at key health metrics, QOL & COM-B determinants of behaviour. The evaluation also includes a qualitative component to provide lived experience data.

Pre Cancer Surgery

EXI’s Exercise Intervention: Cancer Prehabilitation through Individualized Tracking and Encouragement (EXCITE Study). A study run by an independent university partner.

Draft protocol attached. This is a RCT examining the impact of both pre-hab and rehab for cancer surgery patients. We are currently finalising this protocol and may slightly slim down the list of outcome measures, but the aim is to provide rigorous clinical outcome data in an adequately powered cohort.

Post Cancer Surgery

A feasibility study of wearable technology-guided exercise preconditioning to accelerate return to function after cancer surgery. A study run by an independent university partner.

Study outcomes include average step count, enrolment rate, compliance with EXI application, compliance with exercise intervention, completion and dropout rate, patient reported outcomes measured at baseline and prior to surgery.


A digital incentive scheme to promote physical activity amongst people with type 2 diabetes. A study run by an independent university partner.

The service will have two intervention arms: ‘Claim your Watch’ (prescription adherence = points towards the cost of the watch provided at the start of the service), and ‘Earn with Watch’ (prescription adherence = points towards a choice of rewards, for those who already have a wearable when they enter the service), along with a control arm who will receive usual care.

Exercise is Medicine

Evaluation of the integration of EXI into an existing community Exercise Is Medicine programme. A study run collaboratively by Mason University and Freedom Aquatic and Fitness Center, Virginia.

This will be another pragmatic evaluation, primarily assessing change over time. 1. Usual EIM programme, 2. EIM with EXI and Apple watch, 3. EIM with EXI app, and 4. EXI app only (no EIM). 

Real World Evidence

EXI is committed to ongoing scientific research, advancing digital health, empowering healthcare professionals to reinvent the management of long-term medical conditions.

We are proud to partner with innovative, forward-thinking researchers and clinicians to demonstrate the clinical value of the platform and its real-world integration into the health ecosystem.

Partner with EXI