No, as their are many "big" and thick people who are very weak for their given size.
However, the reverse is true. Strength = Size. As you get stronger, you tend to develop more muscle, quicker and easier (at least in the beginning).
100,000 generations of humans have been hunters and gatherers; 500 generations have been agriculturalists; ten have lived in the industrial age; and only one has been exposed to the world of computers.