Keto flu for me is really hard to cope with. Even a walk on flat terrain feels too much and I feel miserable for the few days it lasts (usually 4/5). But still

Keto flu for me is really hard to cope with. Even a walk on flat terrain feels too much and I feel miserable for the few days it lasts (usually 4/5). But still I lack explosive energy even when I am fully keto adapted which is a problem because I really like Bouldering. That's why I stay more on the intermittent fasting and less strict about keto. Finally, you are correct that increasing salt helps, but just barely for me.