Pff i know you need both for a lot of sports, and i train for both, and what FF said is true the majority of well built people are fitter than random people on the street. But if you had to do only one exclusively it would be possible to be fit just doing running/ cycling,
i don't think it would be possible just weight lifting and wheeling on a wheel chair all day at 1mph or sat on a chair.
says on wiki since we seem to use this as a source; Physical fitness is an attribute required for service in virtually all military forces.
whats the majority of fitness in military...running, and running with weight very little "heavy" exersises involved as they aren't directly related to "essential" fitness.
You can use any source you want mate..Physically fitness is more than just running....and any source will agree with that

Check the physical tests for the US or UK military..I guarantee there is more than just running in them
