is posible increase VCI?

Do you think it is possible to increase VCI? There is a post where someone says they increased their VCI by up to 32 points, as well as their processing speed and working memory, just by studying on their own. Is it really possible to have such a drastic increase? Here is the post: https://www.reddit.com/r/cognitiveTesting/comments/14l8wce/my_vci_went_from_98108_to_131142_in_just_14/