It started when sports minister Rajyavardhan Rathore posted a video of himself doing push-ups, and urging people to join the #fitnesschallenge.
India's cricket captain Virat Kohli posted a video of himself doing a plank and challenged PM Narendra Modi to share his own.
Mr Modi has now said he will join in.
Mr Rathore's tweet has been shared more than 9,000 times and has generated a lot of response on social media.
#HumFitTohIndiaFit ???— Rajyavardhan Rathore (@Ra_THORe) May 22, 2018
Post pictures and videos of how you keep yourself fit and send a #FitnessChallenge to your friends on social media. Here's my video ?and I challenge @iHrithik, @imVkohli & @NSaina to join in? pic.twitter.com/pYhRY1lNEm
I have accepted the #FitnessChallenge by @ra_THORe sir. Now I would like to challenge my wife @AnushkaSharma , our PM @narendramodi ji and @msdhoni Bhai for the same. ? #HumFitTohIndiaFit #ComeOutAndPlay pic.twitter.com/e9BAToE6bg— Virat Kohli (@imVkohli) May 23, 2018