MP Penny Mordaunt said she took painkillers ahead of the Coronation to help her carrying ceremonial swords. She told Nick Robinson's Political Thinking podcast she had made sure she fit and well ahead of the ceremony.
She said: "I was not in the gym for six months prior to this" but added: "You want to make sure you are in good nick.
"I did take a couple of painkillers before just to make sure I was going to be alright."
Ms Mordaunt said her navy training helped her know how to keep her circulation going by "wriggling your toes".
Ms Mordaunt has said she is grateful after praise was heaped on the Conservative Cabinet minister for her role in the King’s coronation.
As Lord President of the Council, she was responsible for bearing The Sword of State and presenting The Jewelled Sword of Offering to the King – the first time it has been carried and presented by a woman.
Dressed in a custom-made teal outfit with a matching cape and headband with gold feather embroidery, she held and carried the pieces for the majority of the service.
Writing in the Telegraph, she described the occasion as a “humbling day” and said she was “grateful” that people had decided to recognise her role in the event.
She added: “It was a humbling day in every respect. Crowned heads and world leaders were just faces in the congregation. All came to bear witness to love, service and sacrifice. His Majesty the King served longer than anyone in history as Prince of Wales.
“This is a life lived in the public eye. The royal family sets a parenthesis. We politicians should heed this example. We, too, have a choice. We can decide to narrow the parenthesis. Or we can decide to widen it. It takes courage, patience and judgment to listen to all views.
“If people chose to recognise my role, then I’m grateful. But my gratitude and thanks are reserved for all who took part. You can choose dissent. You can choose duty. The real recognition for Saturday, though, belongs to all of us.”
The Leader of the House of Commons, and former Conservative leadership frontrunner, carried the 17th-century Sword of State in procession to the abbey.
Its silver-gilt hilt features the form of a lion and unicorn and the wooden scabbard is covered in red velvet with silver-gilt rose, thistle and fleur-de-lis emblems.
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Later in the ceremony, Ms Mordaunt exchanged the Sword of State for the Jewelled Sword of Offering and delivered it to the archbishop.
The second sword was briefly clipped to the King’s coronation sword belt and then after a proclamation by the archbishop, the King stepped forward and offered up the sword.
It was then placed on the altar and redeemed with “redemption money” by Ms Mordaunt.
The sword was later drawn and she carried it in its “naked” form – without its scabbard – before the King for the rest of the service.
Her performance of the highly visible role in proceedings attracted much praise from across the political spectrum.
She wrote that since Saturday, she had been “asked hundreds of times about how I felt about the coronation”.
She said: “The overriding emotion was one of great love. There are a thousand types of love and a thousand ways of showing it. What we saw on Saturday was a form of love. But we’re British, so we prefer the word duty.”
She wrote: “Where we were from on Saturday was diverse. Some protested. Most would disagree with such views.
“Most would also defend their right to express them. That’s what democracy is about. It doesn’t mean unity. It’s about dissent.
“Some think democracies are weak because of this and believe autocracies are somehow doing better. The reverse is true. At times like this, we are reminded of what we all have in common. And that we should cherish one another, and the differences and obligations between us.”
