Pippa Middleton shares her go-to pregnancy workout

Pippa Middleton continues to stay in shape while entering her third trimester.

The 34-year-old expectant mother -- and Kate Middleton's younger sister -- gave an update on how she's feeling as she gets ready to welcome her and husband James Matthews' first child together. In her latest column for the U.K. supermarket monthly Waitrose Kitchen magazine this week, Pippa reveals that her recent go-to exercise regimen consists of swimming.

21 PHOTOS
Pippa Middleton and James Matthews together
See Gallery
Pippa Middleton and James Matthews together
Pippa Matthews, center, James Matthews, center left, and James Middleton, second right, arrive to attend the wedding of Princess Eugenie of York and Jack Brooksbank at St George’s Chapel, Windsor Castle, near London, England, Friday Oct. 12, 2018. (Adrian Dennis, Pool via AP)
WINDSOR, ENGLAND - OCTOBER 12: James Matthews and Pippa Middleton attend the wedding of Princess Eugenie of York and Jack Brooksbank at St George's Chapel in Windsor Castle on October 12, 2018 in Windsor, England. (Photo by Pool/Samir Hussein/WireImage)
Pippa Middleton and her husband James Matthews arrive for the christening service of Prince Louis at the Chapel Royal, St James's Palace, London, Monday, July 9, 2018. (Dominic Lipinski/Pool Photo via AP)
Photo by: KGC-520/STAR MAX/IPx 2018 7/13/18 Pippa Middleton and James Matthews arrive at The All England tennis club in Wimbledon for the Mens Semi Final.
PARIS, FRANCE - MAY 27: Pippa Middleton and her husband James Matthews are seen at the French Open at Roland Garros on May 27, 2018 in Paris, France. (Photo by Bertrand Rindoff Petroff/Pierre Suu/Getty Images)
Pippa Matthews and James Middleton sit in the Royal Box on Centre Court on the fourth day of the Wimbledon Tennis Championships in London, Thursday July 5, 2018. (AP Photo/Tim Ireland)
LONDON, ENGLAND - JULY 14: Pippa Middleton & James Matthews seen at Day 11 of Wimbledon 2017 on July 14, 2017 in London, England. (Photo by HGL/GC Images)
LONDON, ENGLAND - JULY 14: Pippa Middleton and James Matthews attend day eleven of the Wimbledon Tennis Championships at the All England Lawn Tennis and Croquet Club on July 14, 2017 in London, United Kingdom. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - JUNE 27: Pippa Middleton (L) and James Matthews attend The Miles Frost Fund party at Bunga Bunga Covent Garden on June 27, 2017 in London, England. (Photo by David M Benett/Dave Benett/Getty Images)
LONDON, ENGLAND - JUNE 27: Pippa Middleton (L) and James Matthews attend The Miles Frost Fund party at Bunga Bunga Covent Garden on June 27, 2017 in London, England. (Photo by David M Benett/Dave Benett/Getty Images)
Pippa Middleton (L) and her husband James Matthews (R) arrive at Rose Bay Wharf by sea plane in Sydney on May 31, 2017. Pippa and Matthews, who married on May 20, 2017, are visiting Sydney on their honeymoon. / AFP PHOTO / SAEED KHAN (Photo credit should read SAEED KHAN/AFP/Getty Images)
JUNE 1, 2017: DARWIN, NT - (EUROPE AND AUSTRALASIA OUT) Newly married James Matthews and Pippa Middleton arrive into Darwin International Airport in Darwin, Northern Territory. (Photo by Glenn Campbell/Newspix/Getty Images)
ENGLEFIELD GREEN, UNITED KINGDOM - MAY 20: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) James Matthews and Pippa Middleton leave St Mark's Church after their wedding on May 20, 2017 in Englefield Green, England. (Photo by Max Mumby/Indigo/Getty Images)
ENGLEFIELD GREEN, UNITED KINGDOM - MAY 20: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) James Matthews and Pippa Middleton leave St Mark's Church after their wedding on May 20, 2017 in Englefield Green, England. (Photo by Max Mumby/Indigo/Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Pippa Middleton and James Matthews leave after getting married at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by Pool/Samir Hussein/WireImage)
ENGLEFIELD GREEN, UNITED KINGDOM - MAY 20: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) James Matthews and Pippa Middleton leave St Mark's Church after their wedding on May 20, 2017 in Englefield Green, England. (Photo by Max Mumby/Indigo/Getty Images)
BUCKLEBURY, BERKSHIRE - DECEMBER 25: Pippa Middleton and James Matthews attend church on Christmas Day on December 25, 2016 in Bucklebury, Berkshire. (Photo by Samir Hussein/Samir Hussein/WireImage)
LONDON, ENGLAND - JULY 06: Pippa Middleton and James Matthews attend day nine of the Wimbledon Tennis Championships at Wimbledon on July 06, 2016 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - JULY 06: Pippa Middleton and James Matthews attend day nine of the Wimbledon Tennis Championships at Wimbledon on July 06, 2016 in London, England. (Photo by Karwai Tang/WireImage)
Photo by: KGC-520/STAR MAX/IPx 2018 7/11/18 Pippa Middleton and her brother James Middleton arrive at Wimbledon for the tennis this afternoon.
Pippa and James Matthews in the stands on centre court on day eleven of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon. (Photo by Steven Paston/PA Images via Getty Images)
HIDE CAPTION
SHOW CAPTION
of
SEE ALL
BACK TO SLIDE

"Swimming throughout pregnancy offers a wonderful feeling of weightlessness," Pippa writes. "As the months pass, you feel heavier by the day, but being in water gives that floating, light-as-air feeling that soothes and relieves the body, counteracts increased back strain and stretches the legs from the growing bump. It’s non-impact, gentle and relaxing."

What the brunette beauty, who's been rocking the perfect summer maternity style lately -- loves most about this form of exercise is that it's one of the safest, she explains.

"You don’t need to adapt and change too much (unlike most other sports)," Pippa continues. "It’s so good for you that you could swim every day -- as long as you don’t overexert yourself -- right up until the end of the third trimester."

The Duchess of Cambridge's little sis confirmed she was expecting back in June, revealing that she hadn't had any setbacks in the first three months. “I was lucky to pass the 12-week scan without suffering from morning sickness. That meant I was able to carry on as normal,” Pippa wrote in the same magazine, adding that she kept her pregnancy a secret until the "riskier months" were over.

Since then, Pippa has been spotted enjoying family time at Prince Louis' christening and attending Wimbledon with her hubby last month. See more on her pregnancy in the video below.

See more of the mom-to-be below!

8 PHOTOS
Pippa Middleton at the royal wedding
See Gallery
Pippa Middleton at the royal wedding
Pippa Middleton and James Middleton arrive for the wedding ceremony of Britain's Prince Harry, Duke of Sussex and US actress Meghan Markle at St George's Chapel, Windsor Castle, in Windsor, on May 19, 2018. (Photo by Ian West / POOL / AFP) (Photo credit should read IAN WEST/AFP/Getty Images)
Pippa Middleton and James Middleton arrive for the wedding ceremony of Britain's Prince Harry, Duke of Sussex and US actress Meghan Markle at St George's Chapel, Windsor Castle, in Windsor, on May 19, 2018. (Photo by Ian West / POOL / AFP) (Photo credit should read IAN WEST/AFP/Getty Images)
WINDSOR, ENGLAND - MAY 19: Pippa Middleton and James Matthews arrive at the wedding of Prince Harry to Ms Meghan Markle at St George's Chapel, Windsor Castle on May 19, 2018 in Windsor, England. (Photo by Chris Jackson/Getty Images)
Pippa Middleton (L) and her husband James Matthews (2L) arrive for the wedding ceremony of Britain's Prince Harry, Duke of Sussex and US actress Meghan Markle at St George's Chapel, Windsor Castle, in Windsor, on May 19, 2018. (Photo by Odd ANDERSEN / POOL / AFP) (Photo credit should read ODD ANDERSEN/AFP/Getty Images)
WINDSOR, ENGLAND - MAY 19: Pippa Middleton and James Matthews arrive at the wedding of Prince Harry to Ms Meghan Markle at St George's Chapel, Windsor Castle on May 19, 2018 in Windsor, England. (Photo by Chris Jackson/Getty Images)
WINDSOR, ENGLAND - MAY 19: Pippa Middleton & James Matthews arrive at the wedding of Prince Harry to Ms Meghan Markle at St George's Chapel, Windsor Castle on May 19, 2018 in Windsor, England. (Photo by Chris Jackson/Getty Images)
WINDSOR, ENGLAND - MAY 19: (L-R) Carole Middleton and James Middleton arrive at the wedding of Prince Harry to Ms Meghan Markle at St George's Chapel, Windsor Castle on May 19, 2018 in Windsor, England. (Photo by Chris Jackson/Getty Images)
Pippa Middleton (L) and her husband James Matthews (R) arrive for the wedding ceremony of Britain's Prince Harry, Duke of Sussex and US actress Meghan Markle at St George's Chapel, Windsor Castle, in Windsor, on May 19, 2018. (Photo by Odd ANDERSEN / various sources / AFP) (Photo credit should read ODD ANDERSEN/AFP/Getty Images)
HIDE CAPTION
SHOW CAPTION
of
SEE ALL
BACK TO SLIDE

Read Full Story