Originally Posted by WFEGb
I'm not a sinker. About 10kg fat too much (has been 23kg before started with swimming). To do this exercise I have to get a little hollow back to get my "bridge cables" work. (The guy in in the clip does this too.)
Really my point in this debate (if there's a debate), is that this can not work for all. If like it's the case for several of my athletes, you're a male with 5-8% body fat, no way that you can perform this. I'm not mentioning those who literally have a negative buoyancy, ie that can not float no matter how.
The subject on this clip can at least float in this position. But some just can not. Period. And if you can not float in this position lungs full of air, then there's absolutely nothing you can do I'm afraid, since your buoyancy center is not strong enough to support your body even with the gravity center perfectly aligned.