Maybe you’re a treadmill bunny and you need your phone to stay put and do its job of tracking your pace and playing Rudimental. Or you need reflective patches for your night runs. Brands take these details seriously when designing workout clothes.
Look for seam or continuous pockets in tops, shorts and jackets where you can rest your phone. Nike makes tiny loops on the back of running shirts to loop your headphones through. If you’re really into smart clothing, Omsignal makes a sports bra, Ombra, with an embedded fitness tracker and USB charger (omsignal.com).