The Pelvic Floor

Described plainly, because the usual language around this is so euphemistic that people practise for years without knowing what they are being asked to do.

What it is

A sheet of muscle spanning the bottom of the pelvis, from the pubic bone at the front to the tailbone at the back, and between the two sitting bones at the sides. Several layers, with openings for the urethra, the anus, and in women the vagina.

It is a structural floor. It holds the pelvic organs up, it maintains continence, and it is part of the system that manages pressure inside the abdomen.

What it does in a pose

It closes the bottom of the trunk. The trunk works as a pressurised container: diaphragm on top, abdominal wall around, pelvic floor below. When all three coordinate, the trunk is stable and force transfers efficiently between the legs and the arms. If the floor is absent, the container leaks pressure downward and the trunk is less stable.

It coordinates with the breath. This is the part almost nobody is taught. The pelvic floor moves with every breath: it descends slightly on the inhale as the diaphragm comes down, and it rises slightly on the exhale. It is not a static structure and it is not supposed to be held.

It supports the base of the spine. Its tone contributes to how the sacrum and lower spine are held.

Finding it

Three approaches. Try all three; different ones work for different people.

The stopping-flow reference. The muscle you would use to stop the flow of urine is part of it — the front portion. Do not actually practise this while urinating; it can interfere with normal bladder function. Use it once as a reference for where the sensation is.

The wind reference. The muscle you would use to hold back wind is the back portion.

Mula bandha, which is between them. What yoga generally means is a lift in the middle, around the perineum — between the anus and the genitals — drawing upward and slightly forward. Neither the front nor the back portion in isolation.

The test that it is right: nothing else moves. No buttock squeeze, no thigh tension, no held breath, no visible movement anywhere. If your buttocks tighten, you have recruited the wrong thing.

The intensity

Twenty to thirty percent. Not maximum.

This is the correction that matters most and the one most often missed. A maximal clench is not a stronger version of the right thing; it is a different, worse thing. It recruits the buttocks and hip rotators, it stops the breath, and it cannot be maintained.

The useful engagement is subtle, sustainable, and compatible with normal breathing.

Why gripping is the opposite of strength

A muscle held in continuous contraction becomes short and tense. A short, tense muscle is weak — it cannot generate force from a shortened position and it cannot lengthen when it needs to.

The pelvic floor needs to do both. It needs tone, and it needs to release: during the inhale, during elimination, during childbirth, during sex.

Chronic over-tension in the pelvic floor is a recognised clinical problem, and its symptoms overlap substantially with weakness — urgency, incomplete emptying, pain. People with an over-tense pelvic floor who are told to do more clenching get worse.

So the phrase "engage your pelvic floor" is incomplete advice. The full version is: engage it lightly when you need it, release it fully when you do not, and be able to do both on demand.

Training it properly

Both halves.

The lift. From a seated or lying position, lift lightly at twenty to thirty percent, hold for five seconds while breathing normally, and release completely. Ten repetitions.

The release. Deliberately let go. Feel the floor drop and widen. This is the half people skip, and for many people it is the half that is missing. Spend as much time on the release as on the lift.

The breath connection. Lying down, hand on your belly. As you inhale, feel the pelvic floor soften and descend slightly. As you exhale, feel it lift. Do nothing deliberately — just observe. Five minutes. This restores the coordination that habitual gripping destroys.

Quick contractions. Ten fast lift-and-releases. A different fibre type from the sustained hold, and needed for coughing and sneezing.

In asana

Where it is genuinely useful: arm balances, inversions, anything where the trunk needs to be stable while the limbs move, and the moment of greatest effort in a strong shape.

Where it is not: restorative and passive shapes, forward folds, and anything where release is the point.

The general approach: engage lightly at moments of effort and transition, release the rest of the time. Some traditions cue continuous engagement throughout a practice. For most people that is too much for too long, and the intermittent version is safer.

When to get proper help

This is a clinical area, and general yoga cueing is not adequate for a clinical problem.

See a pelvic health physiotherapist if: you leak urine when you cough, sneeze, laugh, jump or lift; you have urgency or frequency; you have pelvic pain; you have a sensation of heaviness or bulging; you are postnatal, at any point, and have not been assessed; you have pain with sex; or you have been doing pelvic floor exercises for months with no change.

That last one is important — no change after months often means the problem is over-tension rather than weakness, and the treatment is the opposite of what you have been doing.

Pelvic health physiotherapy is a proper specialism with a real evidence base. It is the right place for this, and a yoga class is not.