The relationship with the father / coach is really interesting. For each of the kids. You never know if its healthy or it goes over the edge.
There's a scene where they show home video footage of the kids training roller skies in a parking lot before school when they're like 8 years old at most. No 8 year old will decide for themselves to wake up at 6 am to ride in circles in a parking lot for an hour. Gjert constantly says he wants his kids to do what they choose, but everytime they choose something different than what he wanted, he flips. He says Jakob can choose for himself if he wants to dedicate his life to track, but he acts like his kids who didn't dedicate their life to athletics are weak minded wimps. Oh and girlfriends are unnecessary and harmful distractions.