The pedal assistance an electric bike provides is a big benefit but also takes away from your fitness goals. Xmera's new bicycle-motorcycle hybrid e-bike offers the best of both worlds by varying the level of assistance based on your heartbeat. An iOS/Android app lets you choose a workout and a BPM to maintain, and an included tracking bracelet monitors your pulse throughout your ride. Heartbeat data is transmitted from the wearable to the bike's micro-controller, which responds with the ideal amount of assistance based on the workout you've chosen. Choose from a retro-styled 250 watt model with a max of 16mph, or a 750-watt option that can go up to 20mph with a battery range of 37 to 120 miles on a full charge.