Countermeasures when lying vs telling the truth

[Throwaway1]

Just curious about how much harder one should augment their responses to the polygraph control questions when they are actually lying on the relevant questions instead of telling the truth. Would the client need to change anything, like do both tongue biting AND mental countermeasures even though the book says it would be 'overkill'? Or would it be enough to just stick to what the book recommends?