The Duchess of Cambridge's sister Pippa Middleton, who turned 35 yesterday, is doing her best to maintain her physique during the third trimester of her pregnancy.

"Having the agility to bend down is not what it was," she says.

"I feel far from a ballerina, but I'm equally determined not to break into a penguin-style waddle and plod around with bad posture.

"So with this in mind, I've continued to embrace barre-inspired workouts throughout pregnancy — a form of exercise taken from ballet which involves the small, isolated movements that develop flattering muscle tone or so I hope."

Advertisement

Pippa, who is expecting her first child in October with multi-millionaire financier husband James Matthews, has previously shared intimate details of her baby bump and her pregnancy work-out experiences, reports the Daily Mail.

The fitness fanatic revealed in her Waitrose Weekend column last month that she has given up jogging.

"I stopped running — not because I read it was unsafe, just because I rather liked the idea of giving my body (and growing baby) a rest from pavement pounding."

She says she is "conscious of holding my tummy in (as if giving your baby a hug) to support my back and ensure that post-baby, my old favourite jeans will still fit... eventually."

Pippa is expecting her first child in October with multi-millionaire financier husband James Matthew. Photo / Getty Images
Pippa is expecting her first child in October with multi-millionaire financier husband James Matthew. Photo / Getty Images

And while her sister suffered from extreme morning sickness in the early stages of each of her three pregnancies, Pippa endured no such discomfort during her first trimester.

The debilitating illness resulted in the Duchess of Cambridge withdrawing from public duties for several weeks.

"I was lucky to pass the 12-week scan without suffering from morning sickness," she has said.

"This being my first pregnancy, I had so many questions I felt were still unanswered.

"I wanted to know things like — would I strain if I served in tennis? Are all strokes of swimming safe?

"Can I still do a normal yoga class if I avoided certain positions? Could I still work my abs?

"It's particularly hard in the early months when you don't really want to share the news with everyone, not even your class instructor."

"I've noticed my body change and weight increase — but through effective exercise and sports I feel that it's being strengthened to support a healthy pregnancy, birth and recovery."

The mum-to-be's latest comments come days after she supervised a furniture delivery at her west London home.

She was on hand as a team of movers unloaded rugs, mattresses and ornamental armchairs at the £17million property she shares with husband on Tuesday.

The couple have been living in rented accommodation for almost a year while extensive renovation work was carried out, with a nursery among the new additions to the sprawling mansion.

However it appears the couple will soon be back at home, with furniture being moved back into place meaning they will be settled in ahead of the arrival of the baby.

They spent a reported £1.2million on a large extension, which will add a separate male and female dressing rooms off the master bedroom as well as a nursery for their little one.