This 17 week 50K plan is suitable for someone who is running 25-30 miles per week base mileage and can comfortably finish a half marathon. It has flexibility built in for cross training if you wish to incorporate cycling into your training. No equipment needed other than a good pair of shoes and a positive attitude. Workouts are written with Rate of Perceived exertion so no heart rate monitor is needed, however there are basic heart rate guidelines as well if one wishes to use that. A GPS watch is helpful but not essential.