I have had a lot of people message me about this. They get this low abdominal ache after they start Core and Floor. It lasts a week or two and then goes. The most likely cause of this is DOMS – delayed onset muscle soreness. This is from activating your pelvic floor and deep abdominal muscles for the first time in forever ;-). So if it feels like a dull ache and similar to what you’d get in other muscles after exercising (like your bum and legs), then it’s probably just that. However, if you’re concerned or you have signs of infection (offensive smell, inflammation, redness) or you just think hmmm this doesn’t feel right, always seek care with a health professional.