A common goal for many marathon runners is to break certain times, such as 5 hours, 4 hours, 3 hours, etc. For many runners a sub 4 hour marathon is a goal that they feel is attainable. A sub 4 hour marathon requires a 9:09 pace, although you really need to run a bit faster […] The post Are You Ready to Run a Sub 4 Hour Marathon? appeared first on Mile By Mile.