Let me reiterate this: if you are powerful, you get an added efficiency bonus that a less powerful runner doesn't have. (runninginsystems.com)
We bred sighthounds with narrow aerodynamic bodies, long legs and deep ribcages, to make them faster and more powerful runners. (thehappypuppysite.com)
He's a powerful runner, a workhorse who could be dominant in a game that will be hard to pass in for either team. (sbnation.com)