Exhale all the oxygen then flex your abs, and when you need air hold it for another 5 seconds, and then when you need air hold it another 3 seconds. If you inhale you have to start over.
Works every time.
Exhale all the oxygen then flex your abs, and when you need air hold it for another 5 seconds, and then when you need air hold it another 3 seconds. If you inhale you have to start over.
Works every time.
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