Table 3.

Error rate and error per minute values for trackers.

Wearing site	Activity	Error rate	Error per minute
Wrist	Walking with walker	73.1%	34.2
	Walking at 2.5 km/h	6.8%	6.2
	Walking with shopping cart	19.8%	16.4
	Walking at 5 km/h	3.9%	4.4
	Brisk walking at 8 km/h	4.4%	2.6
Chest	Walking with walker	95.6%	45.0
	Walking at 2.5 km/h	6.7%	6.6
	Walking with shopping cart	19.8%	15.4
	Walking at 5 km/h	1.4%	1.8
	Brisk walking at 8 km/h	1.8%	6.3
Pants pocket	Walking with walker	83.6%	38.8
	Walking at 2.5 km/h	5.5%	5.0
	Walking with shopping cart	6.4%	5.9
	Walking at 5 km/h	3.7%	5.5
	Brisk walking at 8 km/h	5.5%	5.7