On Jul 2, 2018, at 12:11 PM, Bill Rising <[email protected] <mailto:[email protected]>> wrote:
> Part of the difference could come from where she wears the fitbit. After some > discussions in our family (back when there was a friendly competition about > who could rack up the most steps), experimentation showed that many more > steps got registered if the fitbit was on a sock/shoe than if it was near the > waist, and near the waist registered more than near the neck. I suspect this is right. I have a pretty good Omron pedometer, designed to be worn at waist level. It is basically an accelerometer that counts steps by measuring the acceleration and deceleration as I walk or run. The Apple Watch is on my wrist and I’m much more likely to shake my wrist around, adding phantom steps. I did an experiment this morning. The dog took me to Hays-Kennedy park and I steadily walked on the track while counting my steps. I wore the following: • Omron pedometer near my right hip clipped to the waistband of my shorts. • iPhone in my left pocket running the Pedometer++ app. • Apple Watch on my left wrist. • Garmin Vivofit on my right wrist. Here are the results: • 2578 = my count of the number of steps • 2564 = Omron (0.5% low) • 2607 = iPhone (1.1% high) • 2702 = Apple Watch (6.6% high) • 2637 = Garmin (4.1% high) It seems the ones near the hips are most accurate. L^2 PS/ Pedometer++ has the capability to average in the count from the Apple Watch. I turned that off in its preferences. PPS/ The Apple Watch may have been skewed because I was holding a very active leash in my left hand most of the time. --- Lee Larson [email protected] <mailto:[email protected]> Alf Todd,’ said Ukridge, soaring to an impressive burst of imagery, ‘has about as much chance as a one-armed blind man in a dark room trying to shove a pound of melted butter into a wild-cat’s ear with a red-hot needle.’ — P. G. Wodehouse Ukridge, 1924
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