48 minutes.
Since my schedule is what it is (different than posted schedule now, of course), I didn't make two separate trips to the LF's school and mine, since there was only 45 minutes intervening between the letting out of the one and the letting out of the other, not quite enough time to get home, cool off properly, and then head out to get him. So that was 30 or so minutes total, and my body was nagging me, because 30 minutes of walking is not enough for my body now. So I took a trip to the store to make my body happy, and it was.