Training a Border Collie to run fast is doable. Border Collies are naturally athletic lean, and intelligent dogs meant to chase after things. Thus, training them to run fast is easy. Best of all, they love to play and exercise their minds, so it's also good for them. Border Collies don't need much convincing to run fast as they are great runners. Training them to run fast is very natural.  However, you can certainly encourage them in this way by incorporating more running into their daily exercise. Playing fetch and chasing balls keeps them excited and active, as they get bored with sedentary activities. This means your dog will have no problem running around and staying active with a little exercise and motivation. These activities keep them healthy and at the top of their game. A Border Collie's intelligence also means they need a lot of mental stimulation while running. They are very active animals; if you want to make them run fast, it should be worthwhile for them.