Stay fit is a healthy way to shop in big-box stores with the help of a smart shopping cart

Stay Fit is a speculative intervention designed to activate, educate and motivate Americans to increase physical activity during their weekly shopping trips. Made in collaboration with Brandon Washington and Jung Soo Park, under the guidance of Sigi Moeslinger and Masamichi Udagawa of Atenna Design.

– Concept Development, Research & Strategy, Interaction Development –

More than 35% of adults and 17% of children in america are obese. (Source:

90% of americans live within 15 miles of a walmart and 100 million shop in walmart every week. (source:

This intervention hopes to reach the millions of Americans who shop at big-box stores through a campaign called Stay Fit. Stay Fit is designed around the insight that most Americans spend around 30 minutes shopping, several times a week and over an hour on weekend trips. This is a significant amount of time, which if reframed, can be re-allocated for physical activity. For example, while pushing a shopping cart a 155-pound person can burn 130 calories in one 30-minute shopping trip (Source: Over the course of a week, these shopping trips alone meet the 150 minutes of moderate aerobic activity recommended by the Center for Disease control to combat obesity. 

The two core components of the Stay Fit initiative are the physical "Burn + Earn" Shopping Carts, and the Stay Fit digital platform. Users of the system carry a "Burn + Earn" Membership Card containing shoppers' profiles and activities on the platform. The carts feature an interactive touch screen centered on the handle of the cart that shoppers log into by tapping their card on the built-in reader. The carts track the calories burned by the user during each shopping trip, and customers are rewarded with discount points for healthier food options. By learning about shoppers over time – logging their trips and reconciling them against their purchase profiles – the software provides personalized tips, and points them (literally) to discounted healthy options. Additionally – analogous to Nike+ FuelBand – the system tracks their miles walked and calories burned over time so that shoppers can track their continued progress at home via a web portal or mobile App. 


Unique to this system is that the carts provide “guided journeys” through the store, moving shoppers along prescribed paths that increase their calories burned, and direct them toward discounted Great for You items—a labeling system for healthier options launched by Walmart in 2012. As customers travel through the store, the touchscreen on the cart will ping shoppers when they are about to pass these discounted healthy options, offering more detailed information and suggested recipes.

To understand the end to end user experience we created three user profiles and mapped out their user journeys with storyboards. Through these journeys we pinpointed opportunities for advertisements, branding, interactions for users, and ultimately making shopping a healthier and entertaining experience. This began with creating people that would interact with the experience differently and rough sketches of their journey.

The stay fit campaign creates a healthier brand image for walmart, as well as a new and unique platform for social engagement.

From a business perspective, the Stay Fit campaign is mutually beneficial for Walmart and their shoppers. By creative a valuable reason for shoppers to stay in-store longer, customer spending is likely to increase, adding to Walmart's sales figures. For shoppers, the visualization of calories burned, and the ability to earn discount points, motivates them to walk farther with the carts. And along the route, they are provided with valuable health information that they can apply beyond the aisles of Walmart.