I've been having arch pain in my left foot while I run. After about 2 miles the pain turns into my entire left foot going numb. Numb foot while running FTL My left foot does have a slightly lower arch then the right, but it's not flat. My sneakers (new, just bought them $100 MSRP) http://www.asicsamerica.com/products/product.aspx?PRODUCT_ID=240010036&TITLE_CATEGORY_ID=250001542 Should I get some special insert for the left foot? Maybe get different running shoes? Is this normal for break-in?