This is a 41 week Half Iron 70.3 training plan embracing the Primal Endurance Principles of MAF, fat as a major fuel source for the body (eating Primal), Primal Essential Moves (PEM), lifting heavy things (Maximum Sustained Power - MSP), Heart Rate Variability (HRV), play and High Intensity Interval Training (HIIT). This plan is ideal if you like to listen to your body when you train and enjoy cross training with activities such as Stand Up Paddle Boarding, hiking, surfing or even extreme ...