This is an either-or workout; follow the duration that is put in on “aerobic day: always. The run/walk progression may be a little off time since I used the workout builder tool. The run/walk progression is for athletes who want to start running again but haven’t been able to in the past due to injury or other factors. You should not be doing both a hike and a run those days. Just choose one activity and do it for the duration programmed out.
Does that make sense?