Overtraining is extremely difficult for the majority of practitioners to achieve; it is much more likely that you are suffering from undertraining or insufficient recovery.

noli's read

Jeff Nippard's claim is widely supported by the scientific consensus in sports science. Research, notably the ACSM/ECSS consensus statement (Meeusen et al., 2013), distinguishes overtraining (a serious clinical state requiring months of recovery) from simple functional overreaching (recoverable in a few days). In a laboratory setting, it is very difficult to induce a true overtraining syndrome with traditional strength training, because the body has a great capacity for adaptation. The idea that most practitioners underestimate their recovery capabilities or do not train with sufficient intensity is a common observation in the field, supported by the fact that symptoms often attributed to "overtraining" (fatigue, stagnation) are most often linked to a lack of sleep, inadequate nutrition, or high daily stress. The advice is therefore very faithful to the state of the literature: it is not about denying fatigue, but rather about placing the term "overtraining" back into its real clinical context instead of using it as a catch-all for poorly structured programs or improvable lifestyle habits.

the sources

1. 1Wang Z, Wang YT, Gao W, Zhong Y 2023
2. 2Bonnar D, Bartel K, Kakoschke N, Lang C 2018