|Born||28 October 1977|
|Height||1.84 m (6 ft 0 in)|
|Weight||75 kg (165 lb; 11.8 st)|
|Event||Men's & mixed doubles|
With his men's doubles partner Lars Paaske he won the 2003 IBF World Championships defeating Indonesian pair Candra Wijaya and Sigit Budiarto in the gold medal match and the All England Super Series 2010 defeating compatriots Mathias Boe and Carsten Mogensen. Rasmussen also competed in badminton at the 2004 Summer Olympics in men's doubles with Paaske. They had a bye in the first round, then were defeated in the round of 16 by Yim Bang-eun and Kim Yong-hyun of Korea.
He also competed in mixed doubles with partner Rikke Olsen. They had a bye in the first round and defeated Daniel Shirley and Sara Petersen of New Zealand in the second. In the quarterfinals, Rasmussen and Olsen beat Kim Dong-moon and Ra Kyung-min of Korea 17–14, 15–8 to advance to the semifinals. There, they lost to Nathan Robertson and Gail Emms of Great Britain 15–6, 15–12. In the bronze medal match, they were defeated by fellow Danish pair Jens Eriksen and Mette Schjoldager 15–5, 15–5 to finish fourth place.
With the retirement of Lars Paaske after the World Championship 2010 in Paris, He is now pairing with another Danish player, Mads-Conrad Petersen.