Welcome to your Trinewbies 80/20 polarised Half Iron 70.3 training plan We will use the very latest techniques of polarised training to get you to the finish line in great shape and enjoy your training journey there. This plan is 18 weeks with a general phase of 9 weeks, a specific phase of 7 weeks and a 2 week taper. Polarised training is a model which means you will spend 80 per cent of your time training at a moderate intensity and 20 per cent at a high intensity. Polarised training plans ...