Working out with San Francisco's Gold Rush cheerleaders

London is due to host America's largest Football league - the NFL - at Wembley, with the San Francisco 49ers taking on the Denver Broncos this year.

The 49ers are doing everything they can to recreate home advantage, which includes the morale-boosting presence of their cheerleading troupe, the Gold Rush.

The BBC's Amanda Davies joined them in a gruelling work-out.