Athos is taking quantified self to the next level with its new product: Core. Using proprietary EMG sensors, mounted wirelessly in custom Athos workout garments, Core aggregates information about heart rate, breathing and how a user is working individual muscle groups, and displays this information in an app in real time to create actionable insights that improve the effectiveness of a workout. Athos believes their product gives a comprehensive and useful insight into athletic progress and isn’t just for power athletes: it could be used by anyone who exercises, or even for rehabilitation purposes. The company just scored $3.5 million in seed funding, so it will be interesting to see how this company and product shape up.