Your Amazon Echo can now tell you how to work out

Amazon's Echo personal assistant (powered by Alexa) is an unusual device that's had a very beta-existence since its launch last summer. It still struggles to hear certain commands, and its utility is limited to certain areas, but that isn't stopping Amazon from releasing new features -- like a new fitness option announced this week. You heard right; you can now ask Alexa to start a seven-minute workout, for instance, and she will provide "a set of excercises designed to increase metabolism, impr...