One of the key elements of the Reebok Crossfit workout programme is its simplicity - it requires no specialist equipment, no gym, no specialist clothing…

As the ‘Fittest man on Earth’ Rich Froning Jnr, Reebok Crossfit Games 2011 Winner says, “You can do a workout any time, anywhere.” In this film he's joined by a group of fellow 'Crossfitters' on the streets of New York City to put the theory to the test.