The secrets of 51-year-old Princess Mary of Denmark’s age-defying figure

Princess Mary of Denmark showed off her age-defying physique in a form-fitting swimsuit on Tuesday as she enjoyed a refreshing dip in the ocean during a family holiday to Ibiza.

Soaking up the sun on the Spanish island, the Australian-born royal, 51, opted for her olive one-piece bathing suit from Danish brand Copenhagen Cartel. She previously wore the garment on Sydney’s Palm Beach in December 2022.

Showing off her enviably toned figure, the mother of four looked much younger than her 51 years as she enjoyed a day at the beach with her husband, Crown Prince Frederik of Denmark.

Her youthful appearance is due in no small part to a dedicated fitness and diet regimen that keeps the future queen looking and feeling her best.

One of the ways Princess Mary keeps looking fit and young is through a targeted exercise regimen, including walking, jogging and horseback riding.

Mary, like the rest of her family, is totally committed to exercise. She is always walking, jogging or horseback riding,” her sister-in-law Leanne Donaldson previously said New idea.

This was evident on the Princess Down Under’s recent family trip for Christmas, when Mary both jogged around Sydney with her son and dipped headfirst into the waves at Palm Beach.

Over the years, the royal family has been seen trying their hand at and succeeding in a number of sports, from tennis to fun runs for charity. She also reportedly has a personal trainer to help her stay in shape.

Meanwhile, when it comes to her diet, reports have suggested that the Australian-born royal family owes the “Danish diet” to her tall, lean physique – a regimen centered on locally sourced and readily available natural foods.

“People living in Denmark tend to eat more fish, especially fatty fish like salmon, and less meat than a typical Western diet,” Sydney dietician Lyndi Cohen previously told FEMAIL.

“In the ‘Danish diet’, the emphasis is on high-quality meat when meat is eaten – and lean options.”

A closer look at the diet shows that Danes tend to have a lower intake of carbohydrates and a higher intake of good fats such as nuts and seeds and protein.

“The Danish diet includes fruit and encourages snacking on berries, which are rich in antioxidants that may protect against disease,” Lyndi said.

“It is also high in root vegetables such as carrots, parsnips and potatoes, while rye bread is a staple food in the diet – mainly because it contains many more nutrients such as B group vitamins, iron, phytochemicals and magnesium.”

“Rye also contains significantly more fiber than white options, which can support heart health,” she said.

The dietitian explained that if Princess Mary follows the “Danish diet,” she is likely to eat a lot of fruits and vegetables and eat a lot of oily fish, potatoes, nuts and seeds, and cheese.

While Mary is said to be disciplined, she is not overly so, as the princess is regularly seen enjoying lavish dinners and glasses of red wine.

Princess Mary and her husband take time off from royal duties with their four children, Prince Christian, 17, Princess Isabella, 16, and Prince Vincent and Princess Josephine, both 12.

Mary and Frederik were spotted taking a break from the kids and their luxury yacht as they took a dinghy to the beach with another couple.

The beloved pair look relaxed as they swam, chatted and laughed together in the calm and clear waters.

Once ashore, Mary covered up in a bright yellow button-up shirt and khaki shorts, while Frederik paired his shorts with a blue T-shirt.

The princess shielded herself from the sun with a white Panama hat and Wayfarer sunglasses. Mary didn’t skip the accessories with gold chains and a leather phone bag from Jerome Dreyfuss.

Her sporty swimsuit – with a two-layer fabric for ultimate support and fit – features a chic square neckline, adjustable narrow straps and seam detailing around the top.

The family’s holiday comes after Princess Mary’s eldest son, Prince Christian, shocked royal fans with a bold announcement ahead of his 18th birthday.

The young prince, who will celebrate his 18th birthday on Oct. 15, will break protocol by forgoing his royal stipend to focus instead on his education.

While the future Danish king is entitled to government funding once he reaches adulthood, he will not accept payments and become a full-time royal until he is 21 years old.

A statement on the Royal House’s Instagram page read: “Prince Christian’s main priority for the coming year is to complete the Prince’s upper secondary education.”

“For example, it has been agreed with the Ministry of Foreign Affairs that support in the Danish parliament for a law on the annual pension will only be sought when the prince turns 21 or through a possible succession of the throne, if that takes place earlier.”

The statement concluded by saying that Christian will no longer be in the limelight but will one day return to public appearances in an official capacity.

“Only after that is it expected that His Royal Highness will participate to a greater extent in official contexts,” it read.

“However, it depends on where the prince is at the moment in his education. Until then, Prince Christian will, just like today, only participate in official contexts to a limited extent.’

Although he has made many public appearances along with his parents and siblings, Christian is not yet a full-time working royal.