You take a deep breath and hold it. Breath out very quickly then immediately back in, all the way. Hold it. Repeat. You don't even need to lie back, you just allow yourself to settle a little deeper.
When I graduated basic training I was fairly lean. I was 5'10" and weighed 148lbs and got fairly good fitness scores relative to the rest of my flight, so I had to have been reasonable well muscled. (Not anymore though. Oh no.) I could still "tread water" just by holding my breath.
It's more of a skill (that they don't teach you, for some reason) than a test of physical fitness.
I imagine this doesn't work for water polo players who are actively doing stuff in the water. I imagine you need to keep breathing fairly heavily just to keep up with the activity. But then again I've never played water polo so I wouldn't know.
When I graduated basic training I was fairly lean. I was 5'10" and weighed 148lbs and got fairly good fitness scores relative to the rest of my flight, so I had to have been reasonable well muscled. (Not anymore though. Oh no.) I could still "tread water" just by holding my breath.
It's more of a skill (that they don't teach you, for some reason) than a test of physical fitness.
I imagine this doesn't work for water polo players who are actively doing stuff in the water. I imagine you need to keep breathing fairly heavily just to keep up with the activity. But then again I've never played water polo so I wouldn't know.