Running is already difficult by itself. Now imagine doing it with a backpack. If it’s necessary for your to lug your stuff around while you trot, invest in a pack built around this activity. The Nike Cheyenne Backpack ($90) is designed for stability and comfort while running. It has a dual main compartment with a dedicated laptop sleeve, adjustable harness, Aerospan back panel with airflow channels for breathablity and Hypervoid perforated padding to reduce bouncing and shifting.