Training program

Hello. 

Does anyone know how to get a schedule plan into my forerunner 955. For example, i added copenhagen marathon event and added a "end time" a goal. 3.15 minutes. Now my watch give me a lots of suggested daily goals. So my question is: Does the suggested daily goals from my Copenhagen maration calculate it according to my "end goal" 3.15 minutes or is the daily suggestion just random? 

Best Regard Stefan