programming flexibility
1.The ISSA core curriculum for Personal Trainers covers the broadest range of useful topics including anatomy, physiology, kinesiology, nutrition, supplementation, personalized diet and exercise programming, flexibility techniques, and sports medicine for the fitness professional.
2.These open APIs include control API(C-API), programming API(P-API) and user API (U-API). C-API is a control separation protocol, which separates control plane from router forwarding plane and enhances the scalability and flexibility of router control plane greatly.

