Running tracksters are ideal for running as they are designed purely for running. That may sound obvious but  they will enhance your performance as the fabric feels really comfortable against your skin and moves with your body motion. They also come with really handy features like internal pockets and foot loops so they do not ride up your leg when running.

They also have effective reflective piping which is a great safety feature when running. 

There are a wide selction of tracksters and running trousers  on this site starting with the classic trackster.