The problem is that just a few appointments or a short night are enough for the walk to get dropped. The plan was actually to still go for a walk on days with morning appointments, as long as I'm not gone the whole morning. Afternoons are the same: as soon as extra commitments come up or I drive to Bolzano or Innsbruck for more than two hours, the walk falls through. That's exactly what shouldn't happen, so I still need to come up with a better strategy.