[quote=@XenoCyanide]
<Snipped quote by Thinslayer>

No, what I said was, I would argue that statement. I've seen very large men who were slow as hell. Speed is acceleration times mass. The more mass the more acceleration there must be which means you would require a significant increase in energy output. Watch UFC and compare Bantamweight to Heavyweight. :)
[/quote]

I see what you're saying. But muscles aren't just dead weight - they're power weight. An 8-cylinder engine is bigger than a 4-cylinder engine, but that doesn't make it slower; that makes it faster. Putting an 8-cylinder engine in a car that can't use it might make it slower, though. And 8-cylinder engines are greater fuel hogs than 4-cylinder engines, so it has greater fuel requirements.

The only reason a muscular orc would be slower than a less-muscular human would be if he didn't eat enough.