Problems with flat foot :(

[pudding_bowl]

Correcting Biomechanics is unique to everyone. You certainly need something to raise your arch. If you already have a good pair of shoes you could look into getting a pair of orthotic insoles from a qualified physio or podiatrist.
As for needing it your entire life... like i say it's unique. I used to get shin splints but after a year of insoles I grew out of them and am fine now.
The body remodels based on the stress it is put under - so by wearing correct footware all the time your foot will begin to remodell to be in a better alignment - this can take years however. You can look at strengthening the muslces of pronation, as this can help to reduce your pain, your physio should help you with this.
Unofortunatly walking around barefoot won't make you better.
You can buy insoles for you soccer boots rather than replacing them
Hope this helps

[kakaislegend]

Wow, thanks for a great and fast reply!

Anyway, are you certain about the body "remodelling" when I use the correct footwear for a long time?

That really makes me happy. So I just have to wear the right footwear, and at home, obviously I wont have to wear any footwear and long time, my foot should be betteR?

Yeah, my physio said to strengthen my hip, quads and buttocks muscle.

Thanks agani!