Meet the woman making everyone clench their vaginas.

You're scrolling on your phone, doing a little bit of brain-rotting, when a smiling, blonde-haired face pops up on your feed.

"On," she says as she pinches her fingers and pulls upwards.

"Off," she says as her hand comes down, fingers releasing.

"Quick ones, let's go. On, off, on, off."

"Turn it on, hold for nine, eight, seven — keep breathing — six, five, four — hold — three, two, one. All the way off."

Sound familiar?

If you're a woman on Instagram, chances are you've come across Sarah Percy from Female Physio Co, aka the woman making us clench our vaginas on Instagram.

This clenching is otherwise known as doing your Kegels, which are pelvic floor exercises.

Sarah is a women's health physiotherapist with a passion for pelvic health — and her personal vagina-clenching vendetta is catching on.

Her videos are flooded with comments from women saying they 'never skip' one of her clenching lessons.

Is it a little weird to be doing a vagina workout on Instagram? Maybe.

But if Sarah has her say on things, it's one of the best things you can do on social media for your health.

Here's why.

Watch: Try pelvic floor exercises with Sarah Percy from Female Physio Co. Post continues below.

Let's start with a little anatomy lesson, because what actually is your pelvic floor?

Your pelvic floor is a group of muscles that sit at the base of your pelvis. They contract and relax to control the flow of urine, faeces and wind.

"It acts like a hammock to support and lift the internal pelvic organs (bladder, bowel, small intestine and uterus)," Sarah explained.

"It also aids in sexual functions and acts as a support to your overall core strength."

A strong pelvic floor sets the foundation for all of this. But for many of us, pelvic floor health is something we only pay attention to during pregnancy or after noticing changes with age.

While women have pelvic floor symptoms that arise during pregnancy, post-pregnancy and perimenopause, Sarah stresses that pelvic floor dysfunction can start much earlier.

"Knowing what's normal and what's not normal when it comes to pelvic health is key in recognising when you might need to see a women's health physio, which is what my platform is all about — spreading awareness," she said.

Sarah hopes to raise awareness about pelvic floor health. Image: Supplied/FemalePhysioCo.

Pregnancy, childbirth and perimenopause can all weaken the pelvic floor. And a weak pelvic floor? That can mean problems related to your bladder, bowel or sexual function.

"During pregnancy, we have a large increase in oestrogen and progesterone which can lead to softening of our passive structures internally, creating more laxity," Sarah explained.

"We have a lot more pressure that the pelvic floor has to withstand, plus we need strength in our pelvic floor to push a baby out vaginally if that's the mode of delivery we choose. We also need adequate strength in our pelvic floor to recover postnatally."

Sarah said pelvic floor muscles can tear during a vaginal delivery, which can cause symptoms such as incontinence, prolapse and pain. Meanwhile, a caesarean can cause pelvic floor muscle tension and increased dryness, leading to pain.

Then there's peri-menopause and menopause.

"As we age, we lose oestrogen receptors in the vulva," Sarah said. "This can cause vaginal atrophy, pain, dryness and overall discomfort. All of these can lead to incontinence, prolapse and pain with intimacy."

Should I follow a 'vagina clenching' Instagram reel?

So, we know what our pelvic floor does, but what exactly are the signs it might not be functioning properly?

These are some of Sarah's red flags:

• You can't control your urine when you cough, sneeze or laugh (this is called stress incontinence).

• You're constantly rushing to the bathroom (called urge incontinence).

• You experience pain with sexual intercourse/pain using tampons/severe period pain.

• You might experience constipation, diarrhoea or incomplete bowel emptying.

• You might experience vaginal heaviness or a vaginal bulge that is worse at the end of the day or with increased activity (a sign of prolapse).

It sounds quite daunting, but don't worry, it's not something to be afraid of.

"Even though there is a lot that can occur with your pelvic floor, there is also a lot we can do to treat pelvic floor dysfunction," Sarah said.

The best thing you can do for yourself is pelvic floor exercises, just like the ones Sarah shares on Instagram.

Also known as Kegel exercises, they involve contracting and relaxing the muscles in the pelvic floor, often holding for a few seconds while breathing normally and then relaxing.

"So many people struggle with remembering to of their pelvic floor exercises," Sarah said.

"And let's face it, we're all doom-scrolling at some point, so I think it's just so easy to do them whilst you're scrolling, as this is easy to fit into our busy lives," Sarah said.

Happy clenching!

Feature image: Supplied/FemalePhysioCo.