New York Post Most of us treat our pelvic floors like that one gym membership we pay for but never use — we know it’s there, we know it’s important, but operating it? Forget about it. For years, we’ve been told to “ just do your Kegels ” while waiting for the kettle to boil, resulting in a collective nation of women pulse-squeezing their nether regions with the discretion of a pooping newborn. As it turns out, we’re mostly doing it wrong, often tensing up without ever fully letting go, which is less fitness and more unnecessary strain. Neglecting these muscles is a bold strategy, albeit a seemingly easier one, considering they are essentially the biological hammock holding your bladder, bowel and uterus in place. And when that hammock sags, things…leak. Descend.…