the point at which your muscle efficiency falls off significantly (your lactate threshold, or LT); and you can improve your endurance, or running economy (RE).It follows that the most effective training takes direct aim at one or more of these three factors

steady runs and marathon pace runs for more experienced runners. Spend 10-25 per cent of your training time here. High Intensity 80-95% of maxThe lower end (80-85 per cent) of this zone encompasses tempo (or lactate threshold) runs - a 'comfortably hard

competitor switches from the swimming stage to the cycling stageT2Second transition, where a competitor switches from the cycling stage to the running stageTempo training Working just below your lactate threshold for an extended period (rather than a short