adjective having a robust muscular body-build characterized by predominance of structures (bone and muscle and connective tissue) developed from the embryonic mesodermal layer
Synonymsmesomorphic
Similarathletic
adjective having or suggesting great physical power or force
Similarpowerful
adjective (of a person) possessing physical strength and weight; rugged and powerful
Similarstrong
Source: WordNet 3.1, Princeton University