"Waist trainers do now allow our diaphragms to move the way they are supposed to," explains Claire. "If we cannot breathe properly due to the major breathing muscle being compressed, fainting or light-headedness may occur, and strains or sprains of the upper ribs and shoulder muscles are likely to occur." Further to that, Claire says it's downright dangerous to exercise while you're deliberately reducing oxygen intake.
They Change the Way You Breathe
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