Couch to 5k
Empowering Healthy Habits — Designing for Behaviour Change on the NHS Couch to 5K App
Introduction
A case study of the NHS Couch to 5K app, focusing on embedding behaviour change principles into a product designed to take people from a sedentary lifestyle to running 5K. The key objectives were to reward user achievements at the right moments, provide meaningful support throughout the nine-week journey, and involve stakeholders closely in the development process.
Agency: Vidatec
Client: Public Health England
Role: Lead UX Consultant
Project Background
The NHS Couch to 5K programme is one of the UK's most effective public health behaviour change initiatives — but a good programme still needs a product that keeps people emotionally connected to it. The app needed to do more than guide users through runs; it needed to sustain motivation across nine weeks, the period where habit formation either takes hold or breaks down.
Key Objectives:
Reward the positives and be supportive
The primary objectives were to reward user achievements and maintain motivation over time — recognising that celebrating both small wins and significant milestones is central to sustaining behaviour change. Alongside this, the app needed to provide genuine support at every stage: from the moment someone considers starting, through to completing 5K and beyond.
Key stages I was responsible for:
In-depth User Interviews
I conducted interviews with existing app users to understand their running habits, goals, and fitness aspirations — and crucially, the moments where motivation wavered. Understanding the emotional as well as functional experience of users gave us the qualitative insight needed to design features that would resonate at the points that mattered most.
Extensive User Testing
I ran user testing sessions with interactive prototypes to validate features against real user behaviour. This wasn't just usability testing — I was observing how users responded emotionally to new features, and using that to refine the experience iteratively.
Features tested
Discover screen
A new screen giving users visibility of their current fitness goal and available runs nearby — connecting in-app motivation to real-world action.
Goalsetting
During onboarding, users could select a preset goal or define a personal one. Giving people agency over their own goal framing is a well-evidenced driver of sustained engagement — and keeping that goal visible on the home screen throughout the programme provided a consistent motivational anchor.
Completing a run
Animated reward moments at run completion created a genuine sense of achievement at the point where positive reinforcement has the most impact. Users could also log how they felt after each run — a lightweight self-monitoring feature that builds a personal record of progress and makes the benefits of running tangible over time.
Conclusion
The NHS Couch to 5K project showed what's possible when behaviour change thinking is built into a product from the start rather than added on afterwards. By understanding what users needed psychologically — not just functionally — the app was able to support people through the moments that determine whether a habit forms or doesn't.
What people said
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Think it's great. Lots of encouragement and a great way of keeping fit and achieving your goals.
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Perfect for starting running — it's like having a running buddy. It's much more than just a running app.
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This will change your life. When I started I couldn't get through week one, run one. Now I can run 30 minutes.