Indian yoga practitioners participate in a mass yoga session on International Yoga Day in New Delhi on June 21, 2017. Photo:AFP

Indian yoga practitioners participate in a mass yoga session on International Yoga Day in New Delhi on June 21, 2017. Photo: AFP

Malaysian yoga practitioners perform exercises during an event to mark International Yoga Day at the Sultan Abdul Samad building in Kuala Lumpur on June 21, 2017. Photo: AFP

Indian Prime Minister Narendra Modi (C) participates in a mass yoga session along with other Indian yoga practitioners to mark the 3rd International Yoga Day at Ramabhai Ambedkar Sabha Sthal in Lucknow on June 21, 2017. Photo: AFP

Indian Prime Minister Narendra Modi participates in a mass yoga session along with other Indian yoga practitioners to mark the 3rd International Yoga Day at Ramabhai Ambedkar Sabha Sthal in Lucknow on June 21, 2017. Photo: AFP