Use a sharp knife and cut through the centre of the lobster on the underside of the body. (latashaskitchen.com)
You can check for your straight line by looking down the underside of your body. (mindbodygreen.com)
Well, if you want to effectively turn on your pelvic floor - glute combo you need to be able to sit back, this allows you to keep your spine from excessively rounding or arching, you need to be able to keep your pelvis in neutral so when you sit back, the underside of the body can turn on like a forklift, rather than the quads turning on like a crane. (weckmethod.com)