Having trouble learning how to hold your breath???

I was browsing google for a good hour before i found a comment that was a idea. When you go too your display settings go under advance. Turn [ON] the frame limiter. I had it off and it wasnt letting me swim under the water all too well. He would just float to the top like he was full of air. When u hit the LMB use your sprint [shift] and you will be swimming under water. I do not garentee this will work for everyone. GL HF