Would running 2 kilometres a week male you a faster sprinter?

I own the nike plus system and my goal is to be a faster runner at sprinting, and i also want to increase my stamina and endurance. I have been running 2km for 3 weeks the month at a pace of 4:30 minutes per km. Would this help me become a better sprinter,if not what would. Please tell me if skipping or plyometrics will work.