Tricky question. Muscles will grow in size from being worked, getting stronger and bigger as a result. So, yes, it can help. But how much help it will be is limited by one's ability to coordinate the various muscle groups. This is why you sometimes see smaller, less muscular people that are "stronger" than bigger folk - because they know how to use all of their muscle efficiently.
Not a black and white question, unfortunately.
"In case you ever wondered what it's like to be knocked out, it's like waking up from a nightmare only to discover it wasn't a dream." -Forrest Griffin