Originally Posted by PhoenixFire
I agree with the point that both of them are totally incredible atheletes, but it's a totally different type of fitness that you can't really compare. Stick each of them in the other's sport and I doubt they'd last 5 seconds fitness wise.
Boxers would last (obviously not at the pace) as they train for endurance and leg strength is focused upon because it is integral to punching power
Cyclists would be no hope in boxing