Top athletes are top athletes because they put in a lot of work. A high training workload requires adequate nutrition, otherwise the engine will inevitably stutter. In many sports, there is the additional challenge that body weight limits performance and athletes need to be as light and lean as possible.
Whatever the background, an inadequate energy supply is detrimental to performance and, not least, health. This problem is described in the symptom complex RED‑S (relative energy defficiency in sport) . A central topic that all those involved in top-class sport need to know about. The podcast is available on SpotifyPart 1. and SpotifyPart 2.