I'm a newbie when it comes to running. I usually run for about 2-3 miles 3x a week for the past 6 months.
If I've skipped too many workouts (i.e. haven't ran in a month), I experience pain in my collarbone around the first mile marker. Or if I haven't skipped any, but try to run farther than I usually do, the pain occurs.
It usually goes away after another mile. However, its really uncomfortable for that mile. What could be the cause of this?