Withings announced two new health and life monitoring devices at CES 2013, both designed to pair with your phone to tell you more about the state of your body. The newest entry in Withings’ line of Internet-connected scales, the Smart Body Analyzer ($150) measures long-term heart rate improvements and air quality, in addition to weight and body fat. It’s planned for a March release. A Smart Activity Tracker ($TBD) is a pocket-sized, 8-gram…