Rabbits are built for running. Most breeds can move extremely speedily when they want to, and they love being given a chance to stretch their legs. You’ll often see rabbits play-fighting and chasing each other around their runs. When this happens, look at the speed with which they move - they use those powerful back legs to drive themselves forwards.
Just as we do, rabbits need to exercise in order to stay fit and healthy
In the wild, rabbits are prey to a lot of things - foxes, stoats and birds of prey to name just a few. A rabbit’s primary means of avoiding these creatures is to run away, fast, and preferably into their warren.