Meghan Markle previously described megaformer Pilates as "hands down the best thing you could do for your body," while the Princess of Wales is also believed to have taken up the holistic workout in order to build up her strength following the birth of her children, Prince George, Princess Charlotte and Prince Louis.

Pilates classes can be pricey mainly due to the specialized equipment, personalized attention, and expertise of the instructors. It's an investment in both facilities and knowledgeable trainers, which contributes to the overall cost. As for frequency, twice a week is reasonable for results.