Visit ketogenicTo be effective in terms of vitality, it must not be in a "gray zone", characterized by a simultaneously insufficient supply of fats and just enough in carbohydrates which hinders ketosis but doesn't provide enough energy in carbohydrate form.
Conversely, the seasoned athlete on a diet keto could theoretically cyclically have a much more substantial carbohydrate intake (and not just enough! ~ 100gr) after intense training such as bodybuilding to recharge muscle glycogen stores for improved performance, without struggling to return to ketosis several hours or days later. This is a hypothesis, an avenue to be explored, which some ketogenic athletes call metabolic flexibility, i.e. the ability to switch from one fuel to another fairly quickly, a capacity few people can claim.