Though her workouts alternate all the time, her favourite technique is reportedly planking—with the Duchess employing different planks into almost all of her hour-long workouts.
The three different types of planks that Kate employs are the normal front plank, as well as the side plank (held with your body one one side) and the prone sky dive plank (involving "lying on your tummy and gently raising your chest off the floor"), according to Daily Mail.
It's also been reported that Kate employs rowing and cycling exercises into her workouts, and focuses on her abs with the help of a Swiss gym ball.
In accordance with her fitness routine, the Duchess rarely strays from her clean, protein-rich diet.
In fact, Kate has a widely-reported affinity for the 'Dukan Diet', which she's said to have employed to speedily shed baby weight after her three pregnancies. The Dukan Diet involves an almost exclusive omission of carbohydrates in favour of lean proteins, vegetables and healthy fats and oils.
While the Dukan Diet is an effective weight-loss method, it's worth noting that carbohydrates are the backbone of any balanced diet—so make sure to research prior, or seek the help of a health professional, before attempting the diet.
When Kate isn't on the Dukan Diet, it's been reported that her intake involves a wholesome blend of fruits and vegetables with high levels of antioxidants.
Kate reportedly avoids dairy and "drinks smoothies morning and afternoon, containing spirulina, kale, matcha (a finely ground green tea powder), spinach, lettuce, cilantro and blueberries". She's also said to enjoy berries blended with almond milk as an afternoon snack, according to Daily Mail.
According to the Daily Mail, Kate also favours raw dishes like watermelon salads, gazpacho, goji berries, tabbouleh and ceviche for their skincare-benefits. "Kate already has the perfect figure but her motivation is to achieve radiant skin," a source told the publication.
On top of her healthy breakfasts and dinners, reports say Kate turns to hearty meals for dinner that she can share with her family. Her go-to recipes include roast chicken, curry and soups.
"In the evenings she indulges her hobby of cooking William's favourite supper, roast chicken," Vanity Fair wrote in 2012.