New Instagram challenge! Today through Monday, 2/16, we're giving you the chance to nominate your run family and win sweet prizes. Think of your favorite teammate who you love to hate, when (s)he drags you out of bed for Sunday long run, pushes your pace at the track on Tuesdays, battles ice baths with you through winter...this one's for them. And we promise, you don't have to be a chemist to know how it works. Grab your GoPro, selfie stick, Nikon camera, iPhone...and get 'graming.
