Aptly located along the Boston Marathon course, this Marathon Sports location has been in Wellesley since 1994. The store, the second in a local chain, carries a wide variety of sporting goods aimed at improving your running, jogging or walking experience, such as iPod holders and heart-rate monitors. What really sets this store apart, however, is its commitment to fitting your sneakers. Rather than letting you choose your shoe based on how its looks and trying it on to see how you think it feels, the trained staff at Marathon Sports will carefully observe your feet as you walk and offer you several shoes they think will best match your foot.