1) Walmart is launching a new "Stay Fit" initiative to encourage customers to be more active while shopping through interactive shopping carts that track calories burned and provide healthy shopping routes and rewards. 2) The carts will provide customers with a personalized shopping path and notifications about healthy items, track calories burned, and reward customers with points for physical activity that can be redeemed for discounts. 3) The program aims to benefit both customers by promoting healthy behaviors and Walmart by increasing sales and creating a healthier brand image through keeping customers in stores longer.