I am building up for a marathon and when I run over about 7mls I get arch pain (demonstrated in last two runs of 10 miles). Ive experienced this arch pain before (post 3peaks challenge) and physio diagnosed plantar faciitis. The problem went away after some stretches, taping etc but mainly as my activity level decreased to just running and football. I am running in NB 860 and this has reared its head again with these longer runs (so I'm stretching again). Today I went for gait analysis at up and running. I've been put into mizuno wave inspire 9 after he tried me in another pair of mizuno and a pair of brooks. Will the inspire 9 provide more support for the arch than the 860? Don't mind having paid out if it solves my issue. I suppose tomorrows run will tell me.