Double Olympic and world track champion Mo Farah collapsed after crossing the finish line in the New York City Half Marathon on Sunday, having recovered from a fall earlier in the race to finish second to Kenyan Geoffrey Mutai.

Farah fell to the ground shortly after completing the race and was taken away from the finishing area in a wheelchair but later allayed fears for his health.

"I feel good," he told a news conference. "I don't remember passing out, but I think it was just I tried so hard in the race, obviously, taking a fall and then going through.

"I'm all right. It's fine. It's no big deal."

The Briton, who won the same half marathon in 2011, endured a tough run after taking a painful fall after five miles. He recovered to finish in 61 minutes 50 seconds -- 18 seconds behind Mutai.

Farah, who won the 5,000m and 10,000m golds at the 2012 Olympics and 2013 world championships, is preparing to run his first full marathon in London in April.

"The conditions today were very, very cold," he said.