My concern too. Because I sink a lot after breathing in, I need to prolong my glide and wait for my head to get near the surface of the water before exhaling and proceed with my pull. Failing to do so will cause me to suck in water, as my head level is insufficiently above water level. I am just a beginner and if there is no way to prevent considerable sinking, so be it. I am used to my prolonged glide. 🙂
