Very helpful list! Two small comments

1. I’ve found eating during long sessions (think 90+ minutes) really helps reduce fatigue in the following days. This also reduces the effectiveness of fat burning training however so YMMV.

2. Think there’s a small mistake in the stress section. Low cortisol does not induce fatigue: consistent high cortisol will do this but in a wired/tired kind of way rather than sleepy. Worth checking the logical flow of this section.