Basically, it makes sense to determine your metabolic profile at any time – regardless of whether you are a beginner and do not yet know your training zones, whether you want to check your performance progress during the process and adjust it if necessary, or whether you want to prepare your pacing specifically for the competition. The aim is to adapt your training to your individual performance – in other words, to control the intensity of each session in a targeted manner, but also to ensure that you are optimally nourished. Caution: you should be well rested and healthy for the test.