Stay away from AAS with running.. I know first hard due to training guys with wrestling, grappling and MMA.. You'll experience shin pumps and craps like crazy..
Meldonix (Meldonium) is the way you want to go, no muscle pumps or cramps and will assist with greater oxygen levels in the blood, I STRONG encourage that you run it with GW-0742..
AAS could cripple you during running, the pumps are not worth it and will set you back..