After walking the three miles both to and from work during the local bus strikes this week with my relatively heavy work bag I had not planned to carry much in my backpack today, beyond picking up some replacement hypo snacks, as I wandered around. My preferred fend-off hypos snack was on special offer... So, work bag weight for another three miles again! That's 40 miles worth of commuting miles/errands miles with the work weight backpack!