As her Let's Move campaign turns five this year, First Lady Michelle Obama has been encouraging Americans to find five ways of leading a healthier life via the 'GimmeFive' challenge.
She showed how she punches and crunches her way to her famously-toned body in a video posted on Twitter.
The video was in response to a challenge by U.S. President Barack Obama who asked her to 'GimmeFive'; in a video of his own that he posted on Twitter last week. FLOTUS is an acronym for First Lady of the United States.
The president's video showed him jogging down the halls of the White House with Vice President Joe Biden and running up the stairs of Air Force One.