'walking' calories estimate seems very wrong
I believe that a 180lb person burns 100 cal per mile (speed doesn't matter much), and the calories are proportional to one's weight.
I'm 194lb and just logged 65 minutes of walking at 3.0mph. This should have been
194/180 * 65/60 * 3 * 100 = 350 cal, but I'm only seeing 229. Why?