This is because intense exercises can increase your stress hormone called cortisol which makes it harder to enter into ketosis. (bodyketosis.com)
Chronic activation of the sympathetic nervous system releases a stress - producing hormone called cortisol into the body. (familydiplomacy.com)
The primary adrenal hormone called cortisol serves as a kind of moderator in making sure your blood sugar between meals, especially during the night, stays adequate. (ericbakker.com)