B78 running programs are set up to progressively increase your run mileage in a manageable and calculated way.  If you are a highly experienced runner then you will likely know the answer as it applies to you.  If you are a beginner or novice then we suggest you follow the program as written.  Running is unique in that it is just as much about aerobic fitness as it is ones ability to handle impact.  It is important to let your body adapt and recover from the impact as much as the aerobic work.  As the program progresses your weekly hours and mileage will increase as well as the frequency with which you run (number of days per week you run).  If the program seems easy at the start, be patient, it will get more challenging.

Posted in: Running