Kentuckiana Farms is pleased to announce that the 2010 book for Muscle Mass is now full and closed

. Standing his second season at stud, his first crop of foals are highly anticipated to arrive this spring. Mares in his first exciting season include the dams of Sand Vic ($2.1 million), Pure Ivory ($1.4 million), Susies Magic ($734,188), Birminghim ($791,084) and Porsche Hall ($642,396).

Muscle Mass retired to stud duty as the fastest two-year-old son of super-sire Muscles Yankee having established his world-record mark of 1:53.4 in only his second career start. Muscle Mass won five major stakes in an undefeated season at 2 winning all seven of his starts, including back-to-back wins in Lexington and a 10-length, track and stakes record in the American-National.

Muscle Mass was a stunning $100,000 yearling and hails from one of harness racing's most prolific families. Out of the dam Graceful Touch, 2, 1:56.1 ($161,983), a brilliant stakes winning two-year-old herself and a daughter of the sensational ill-fated Valley Victory racemare and producer Act of Grace, 3, 1:52.3 ($403,525). Before her tragic death, Act of Grace produced stakes winning Cobol, 3, 1:54.1 ($411,457) and Graceful Touch in only two foals.