"I just post stuff in the moment - I am an impromptu person," she said. 

"I don't know if it is the best attitude, but that is the way I do it."

Asher-Smith was one of a group of athletes pressing the British Olympic Association to relax their stance on posting sponsor-related material, in line with less restrictive guidelines now allowed by the International Olympic Committee (IOC). 

She was speaking at a "Chat with Champions" forum at the Athletes' Village. 

These gatherings form part of the IOC Athlete 365 education programme and, according to organisers, "allow well-known champions to share their experiences and vision of the sport with the young athletes". 

The theme of this particular session was "Brand Yourself". 

Young athletes were also given a chance to question social media expert Zac Farrer, Samsung marketing supremo Stephanie Choi and kickboxer-turned-coach Janosch Nietlispach, billed as a "social media influencer".  

"Please share with your followers behind the scenes - sooner or later you will be a brand," Nietlispach advised.  

The presence in the audience of 11-year-old skateboarder Sky Brown served as an illustration of how things are changing. 

She has 447,000 instagram followers and hopes to represent Great Britain at the Tokyo 2020 Olympic Games. 

The era of Youth Olympic Games has coincided almost exactly with the decade when social media exploded onto the scene. 

But the Q&A session wasn't all about keypads and social media "likes". 

Participants asked for advice on nutrition, diet and training, and Asher-Smith told Swiss skater Noah Bodenstein: "I am most proud of myself when I have achieved something after hardship." 

This was a reference to her recovery from a foot injury in 2017 to win World Championship 4x100m relay silver.  

"I look at every sacrifice as relative - if I am successful, then my life will be better than it ever would have been if I had been out partying," said Asher-Smith, who competed in the European Youth Olympic Festival before graduating to the Olympic team in Rio 2016.  

"Chat with Champions" has been an integral part of the Youth Olympic Games, ever since the first edition in Singapore 10 years ago.  

The sessions in Lausanne continue at intervals throughout the Games, with participants including 2018 Olympic figure skating champion and Athlete Role Model Patrick Chan, cross-country gold medallist Kikkan Randall and IOC President Thomas Bach.