As my hair grows longer, I'm in need of new hairstyles, especially for when I'm doing sports (I do vaulting, which in short is gymnastics on a horse). Untill now, the only two styles that have worked out all right are ponytail and french braid - and now I'm having trouble with the ponytail because my hair gets tangled and I'm afraid it causes too much damage. I haven't yet found any buns that stay. The main problem is, I can't have a lot of "stuff" in my hair, since my sport is a bit rough and hairsticks and forks and such might break or poke somebody's eyes out...

So, I'm just wondering if you know any hairstyles that are really secure, without a lot of accessories in it?
How do you wear your hair for such activities?