Mobile Phone-Based Measures of Activity, Step Count, and Gait Speed: Results From a Study of Older Ambulatory Adults in a Naturalistic Setting.
Rye Hanton C, Kwon YJ, Aung T, Whittington J, High RR, Goulding EH, Schenk AK, Bonasera SJ. Mobile Phone-Based Measures of Activity, Step Count, and Gait Speed: Results From a Study of Older Ambulatory Adults in a Naturalistic Setting. JMIR Mhealth Uhealth. 2017 Oct 03; 5(10):e104.