Every woman who has entered the free-weight pit of a commercial gym has experienced it at some point: Despite your oversized headphones, pinpoint focus and intentional resting bitch face, an overly “helpful” guy will eventually walk up and bro-splain something to you.

Ranging from the inane (no, my uterus will not fall out if I squat) to the slightly more plausible (should I really worry about lactic acid?), these fitness-related myths have been adopted as fact by many of the ignorant gym-ilk, who then take it upon themselves to propagate the foolishness — while also trying to make themselves look smart.

Here are some of the most pervasive bro-science myths that should be banned from the training floor. So the next time someone approaches you with one of these terrible 12, you can woman-splain the truth.