Distinguish walking time from an activity target
For adults aged 18–64, WHO guidance recommends 150–300 minutes of moderate-intensity aerobic activity per week, or an equivalent vigorous combination. It also includes muscle-strengthening activity on at least two days. Those recommendations describe a broader pattern, not a requirement to complete one long walk.
A Paris walking plan can start with routes you already need: part of a commute, a trip to a shop or a neighbourhood visit. Record actual walking time separately from time spent standing, taking photographs or sitting in a café.
Choose a route that fits the day
For an editorial planning exercise, begin with your starting address, destination and a return option. A riverside outing, a neighbourhood circuit and a hill walk ask different things of a visitor. Check surfaces, stairs and current access before choosing.
Leave room to shorten the outing if conditions or your energy change. Comfortable footwear, an appropriate layer and a clear return route are more useful planning details than an unsupported promise that every itinerary suits every walker.
Build a routine without treating travel as a test
Choose an activity level suited to your present ability and build gradually. A route that works for another traveller may be unsuitable for you. If a health condition or symptoms affect activity, ask a qualified health professional about your circumstances.
After the walk, note the parts that were practical: the duration, surfaces, transport connection and places to pause. Use that record to choose a future route, rather than judging the day by an arbitrary number of kilometres.