The company, known for athletic apparel said to draw sweat away from the body, forecast 2011 operating income of $149 million to $153 million on revenue of $1.37 billion to $1.39 billion.
 Under Armour |
Under Armour posted first-quarter net income of $12.1 million, or 23 cents per share, compared with $7.2 million, or 14 cents per share, a year earlier.
Analysts on average had expected earnings of 19 cents per share, according to Thomson Reuters I/B/E/S.
Revenue rose 36 percent to $312.7 million.
"The demand side of the equation remains healthy," said Wedbush Securities analyst Camilo Lyon.
Gross margin fell slightly to 46.4 percent from 46.9 percent a year earlier, due in part to a rise in fuel prices that is making transportation and production more expensive, Lyon said.
(Reporting by Helen Chernikoff; Editing by Derek Caney and Lisa Von Ahn)