Lack of buoyancy
When pool swimming I really struggle to prevent my lower body from sinking, I notice this less in open water due to having a wetsuit on but I'm sure I'm still wasting a lot of energy. I have tried using a pool buoy (two actually) but that makes it even worse. It's as if I need to kick just to keep my legs afloat. I try to remain conscious of my head position but this doesn't seem to help. Just wondered if there are any other common mistakes in technique that may cause this and if so what drills I can practice to correct it?