Exercise shoes in Greece

Hi everyone.  I'm an adult college student in Austin, TX, USA and I am doing a project for my international marketing class.  I have to introduce a new product to the Greek market.  I've choosen Z-coil shoes.  I use them for running, but they are also used by people who are on their feet a lot or who have foot, back, and knee problems.  I'd like to find out what the exercise (mainly walking and running) shoe competition would be.  I'd also like to find out how popular running races are in Greece.  I would think since the Olympics started in Athens, there would be a large running community, but I haven't been able to find anything online.  I'll need to make sure there would be a market for the shoe.  If the market isn't there for the runners, then I can market to people who work on their feet all day and also to hikers, along with people who need the foot support due to back, knee, foot, and hip problems.  Any help and information from anyone would be greatly appreciated.  My mother is going to help me by making baklava for me to hand out to my professor and the rest of my class.  I'm hoping this will be a great project for me.  Thank you, Jo.