Like, big time. "Waist trainers deliberately compress your abdomen," explains Claire. "The vast majority of our vital organs exist in the space between our hips and our rib cages, so these devices compress and squeeze these organs. That could potentially cause damaging conditions like bowel blockages or abdominal bleeding."
It's not just about your physical organs, either. Spare a thought for the stuff that keeps you going, eh? "When laced very tightly, waist trainers may also restrict your blood from travelling from the legs back up to the heart," Claire says. That can cause swollen feet, damage to the blood vessels and can even bring on fainting spells.