Exer Labs, a fitness start-up headquartered in Denver, Colorado, has secured $2 million in further seed capital, bringing it up to $4.5 million. The new investors are GGV, AME Cloud Ventures, Morado Ventures, Range VC, Service Provider Capital, Shatter Fund, and Mike and Albert Lee, the co-founders of MyFitnessPal. Signia Venture Partners and Zynga’s former chief operations officer, David Ko, have made second investments. Exer Labs produces coaching apps that run on the proprietary platform it has been developing for two years. The company is currently launching Exer Studio, an app for Macintosh that can add a leaderboard like that of Peloton and exercise metrics to any virtual exercise program that uses edge artificial intelligence (for local hardware, rather than networked computing) and computer vision. A physical therapy coaching app is in beta testing mode at clinics in the U.S.