"I spent the day playing computer games, mainly soccer games because I like the competition, like I do in reality, and I think it will help me keep the right focus for the last three days," she said.
"I play FIFA on the second highest level and I also play Pro Evolution Soccer and I always aim to win."
Aiming to win is something Vadlau has taken seriously so far at the sailing regatta at Youth Olympic Games.
She is 12 points ahead of Constanze Stolz (GER) and Celine Carlsen (DEN), who are second and third respectively.
"We have one saying which we try not to say too often, 'We don't have competitors, we have only victims!' she said.
Vadlau is aiming to stay in the top10 in the remaining races.
"If I can stay around 30, 33 points, that would be ideal."
To follow racing sign up to the race Twitter feed, access photos and results on the Sailing competition at the Youth Olympic Games website visit: www.sailing.org/yog