The 12-minute regime, first revealed by Prince Harry in Spare, is said to start off with 'press ups, sit ups, the whole lot', according to Channel 5 's Inside Windsor Castle.
With their marriage entering its 20th year, Sky News looks back at the King and Queen's relationship - from dating in the 1970s to navigating his cancer diagnosis this year.
While his inspiring daily routine is already a robust regime to keep fit and healthy, the King will have to implement new lifestyle changes, including cutting back on the time he sits at his desk.
Expect to see more of Prince William after King Charles' cancer diagnosis washingtonpost.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from washingtonpost.com Daily Mail and Mail on Sunday newspapers.
This will be the second year with King Charles heading up the family’s new year celebrations but he and Camilla are keeping the Queen's charished traditions alive