The descriptive epidemiology of accelerometer-measured physical activity in older adults.
Berkemeyer K, Wijndaele K, White T, Cooper AJ, Luben R, Westgate K, Griffin SJ, Khaw KT, Wareham NJ, Brage S
The international journal of behavioral nutrition and physical activity. Aug 2015
(DOI : 10.1186/s12966-015-0316-z)