This happens almost every time when I do high intensity interval training (HIIT). Even though I'm a physical therapist and a master trainer, I still can't really figure this out. I've read online that this could due to the fact that I may not breathe properly, especially during really high intensity workout sessions.
Has anyone experienced ear popping or making a muffle sound with each breath during weight training sessions, especially during HIIT with weights? It does go away a few minutes after each session.