Quantifying the Training Load in Triathlon

There are different indices of training stress of varying complexity to quantification training load. Examples include the training impulse (TRIMP), the session (rating of perceived exertion [RPE]), Lucia’s TRIMP or summated zone score. But the triathlon, a sport to be combined where there are interactions between different segments, is a complication when it comes to quantify the training. The aim of this chapter is to propose a scale to quantify the training load in triathlon simple application.