The pelvic floor muscles give you the ability to control the release of urine (wee), faeces (poo) and flatus (wind) and to delay emptying until it is convenient.
When you contract the pelvic floor muscles, they lift the internal organs of the pelvis and tighten the openings of the vagina, anus and urethra. Relaxing the pelvic floor allows passage of urine and faeces.
This function is especially important if your urethral or anal sphincters (muscles) do not work normally, as may be the case after giving birth or after prostate surgery.
Pelvic floor muscles are also important for sexual function in both men and women. In men, it is important for erectile function and ejaculation. In women, voluntary contractions (squeezing) of the pelvic floor contribute to sexual sensation and arousal.
The pelvic floor muscles form the base of the group of muscles commonly called the ‘core’. These muscles work with the deep abdominal (tummy) and back muscles and the diaphragm (breathing muscle) to support the spine and control the pressure inside the abdomen.
The floor of the pelvis is made up of layers of muscle and other tissue. These layers stretch like a hammock from the pubic bone at the front to the coccyx (tailbone) at the back, and from one ischeal tuberosity (sitting bone) to the other (side to side). The pelvic floor muscles are normally firm and thick.