[novaswimmer]

"Having lungs full of air causes legs to sink -- empty lungs to remain buoyant"

Yeah, that doesn't really make sense. Either way, my legs sink.

But I can usually stay more 'horizontal' if I don't maintain huge lungfuls of air. Plus, I'd get exhausted holding all that air in. Whatever keeps me relaxed is the most helpful. So a slow, relaxed release of air throughout the stroke, a quick extra puff exhaled as I turn my head up to water, then quick inhale. Repeat.