In Formula 1, the neck is really important. There's a lot of force that's going to your head. We also have a helmet and it's not that light. When it's all about g-force, all of that extra weight in the helmet compounds and puts more and more pressure. To be able to maintain your head in a straight position - especially around the corners and while braking - you need to have strong neck. To train that, it's difficult.
I used to love ballet and I did it really, really intensely. But it came so much about achieving physical perfection, which when I was 14 was a big deal.