Your plan
Changing your run days, long run day or weekly miles
Manage Plan has a row for each: Run days (how many a week and which days they can fall on), Long run day, and Starting weekly miles.
Run days go from 3 to 6 a week, and up to 7 for an Experienced or Competitive runner. Starting weekly miles is the weekly distance your plan builds up from.
Each change asks first, then rebuilds your plan from today. Past completed weeks stay logged.
Plan tab, MANAGE Plan, then Run days, Long run day or Starting weekly miles.