Royal figures, like Kate Middleton, are typically, not only glowing for the way they usually dress, act, speak and live, but also many of them impress with their physique. <a href="https:\/\/see.news\/?s=Kate">Duchess of Cambridge<\/a>, is definitely one of those.\r\n\r\nWith some questioning how she keeps in such trim shape, the Duchess is reportedly having a secret exercise to maintain her flat stomach and toned abs.\r\n\r\nThe Duchess relies on one particularly gruelling exercise to maintain her defined abdomen, according to the\u00a0<a href="https:\/\/www.express.co.uk\/life-style\/diets\/1162932\/kate-middleton-duchess-cambridge-news-diet-weight-exercise-work-out-plan"><strong>Daily Express<\/strong><\/a>\u00a0.\r\n\r\n[caption id="attachment_71100" align="aligncenter" width="490"]<img class=" wp-image-71100" src="https:\/\/see.news\/wp-content\/uploads\/2019\/08\/1_Royal-visit-to-Edinburgh-300x204.jpg" alt="Kate exercises" width="490" height="333" \/> Kate exercises[\/caption]\r\n\r\nKate, mum-of-three swears by an move called the plank, which is similar to a push-up except a person's forearms rest on the ground instead of their hands. According to the paper\u2019s report, plank practitioners have to maintain this position for a period of time, with the stance becoming more painful the longer it is held.\r\n\r\n[caption id="attachment_71103" align="aligncenter" width="276"]<img class=" wp-image-71103" src="https:\/\/see.news\/wp-content\/uploads\/2019\/08\/0_Duchess-of-Cambridge-visits-the-LTA-200x300.jpg" alt="Kate exercises" width="276" height="414" \/> Kate exercises[\/caption]\r\n\r\nA source told Mail Online: "There are three elements, the basic plank, the side plank and the prone sky dive, all of which are positions Kate can hold for 45 seconds or longer and repeat at least ten times each\u201d.\r\n\r\n"The side plank requires you to balance on your side, holding your body straight with feet together and one arm flexed directly under your shoulder,\u201d he added. "Meanwhile, the prone sky dive plank is slightly less excruciating, as you have to lie on your tummy and gently raise your chest off the floor until your tummy muscles beg for mercy."\r\n<p style="text-align: center;"><img class="alignnone wp-image-71101" src="https:\/\/see.news\/wp-content\/uploads\/2019\/08\/2_Kate-Middleton-October-2013-163x300.jpg" alt="Kate exercises" width="249" height="458" \/><\/p>\r\nShe also uses an inflated gym ball to work her abs, an insider said.\r\n\r\nKate's impressive shape form may also be down to active lifestyle. The royal played hockey and tennis at school, as well as taking part in cross-country runs.