Hi guys so i found some glitches that may help me for the speedruns, but i'm confused if ALL of the glitches are permitted expect the double crouch one

Hi, i wanted to speedrun this game and i wanted to use livesplit, but it's not working I think "oh well i think is a normal thing, ill check some others speedruneers to see if there is it" the answer? they have and its working fine, can someone tell me how to do that pls? thanks