Sports on the catwalk?

Recently, I have noticed a lot of designers have been adding more athletic looking clothes to their  collections,such as the popular Stella Mccartney,  Victoria Beckham, and Alexander Wang, prior to the upcoming London 2012 Olympics. But are the outfits wearable? Would the average teenage fashionista go out in fluorescent orange? I prefer the more subtle look for the sporty trend, such as Victoria Beckham's take on the Anorak, which I could definitely see flying off the rails in Topshop or River Island.