CBS, linking to a paywalled ESPN article about Giannis's efforts to improve his free throw shooting:
He tried a motivational tactic during the offseason where his girlfriend would come to his workouts and she would have to run if he missed free throws -- sometimes while carrying their son. But that hasn't seemed to solve anything
Giannis wanted to have a real environment type of workout. He also added a little twist. If he missed his free throws, his coaches would need to run, and he would need to watch. The idea was to be as focused as he can be, and if he wasn’t, other people would pay for his poor shooting.
As if that wasn’t enough, he brought along his girlfriend Mariah Danae Riddlesprigger to the gym with their ten-month-old son Liam. Now the stakes were even higher because he had to watch his girlfriend run with Liam if he misses.