Not really, If you ride in moutains It can be, But when you run acctualy, Your muscles work all the time plus it also trains your stamina, So for example if you get chased by gangsters you have to run on your knees. But if you really want to be good. You should run and bike everyday and it will keep you fit and strong.
Biking is a great exercise for cardiovascular. Biking is hard on the body in a good way in that it works the lower body but whilst it is good for cardio it can be bad for your joints so if you are looking for a cardio exercise which is not hard on your body you should try something like swimming
Running and biking are great exercises.
Running, yoga, biking.
swimming, road biking, and running
Piano, biking, and running
The triathlon consisted of running, swimming, and biking.
Swimming, Walking, Jogging, Biking, Running.
Biking, Swimming, and Running are the sports in a triathlon.
The triatholon : swimming , biking , and running
Biking, running, or mountain climbing.
Running, biking, and swimming
Running, Biking, and Swimming.