Sinewy

Adjective

 * 1) Tough; having strong sinews.
 * 2)  Having or showing nervous strength.
 * 3)  possessing physical strength and weight; rugged and powerful.
 * 4) * 1965 (original), Frank Herbert, Dune, Ace Edition; June 1987, Pennsylvania, page 32:
 * Hawat put a sinewy finger beside his eye.

Thesaurus
able-bodied, acid, athletic, biting, brawny, broad-shouldered, burly, cartilaginous, chewy, cohesive, coriaceous, corrosive, cutting, driving, durable, effective, fibrous, forceful, forcible, gristly, gutsy, hard, hardy, imperative, impressive, incisive, lasting, leatherlike, leathery, mighty, mordant, muscle-bound, muscular, nervous, penetrating, piercing, poignant, powerful, punchy, resistant, robust, ropy, sensational, sinewed, slashing, stiff, stout, strapping, striking, stringy, strong, stubborn, sturdy, telling, tenacious, thewy, thickset, tough, tough as leather, trenchant, untiring, vigorous, viscid, vital, well-built, well-knit, well-set, well-set-up, wiry