There is no single answer regarding fasted training: the decision should be based on how you feel personally, as well as the intensity and duration of the session.

noli's read

Scientific literature supports this nuanced approach. A meta-analysis published in the 'Scandinavian Journal of Medicine & Science in Sports' indicates that while fasted training can increase fat oxidation, it does not necessarily lead to greater long-term body fat loss compared to fed training. Observational evidence and clinical studies (RCT) suggest that performance during high-intensity or long-duration exercise may be impaired without prior energy intake. The principle of personalization highlighted is consistent with the inter-individual variability observed in metabolic responses. In short, the idea that 'how one feels' is a reliable indicator for adjusting nutrition is a pragmatic strategy validated by modern sports practice. There is no rigid evidence mandating fasting for everyone, which makes this position scientifically cautious and balanced.

the sources

1. 1Hackett D, Hagstrom AD 2017
2. 2Vieira AF, Costa RR, Macedo RCO, Coconcelli L, Kruel LFM 2016