Association of Wearable Device–Measured Step Volume and Variability With Blood Pressure in Older Chinese Adults: Mobile-Based Longitudinal Observational Study

Han Xiao   ^{1, 2} , MD ;   Zechen Zhou   ^{1, 2} , PhD ;   Yujia Ma   ^{1, 2} , PhD ;   Xiaoyi Li   ^{1, 2} , PhD ;   Kexin Ding   ^{1, 2} , PhD ;   Xiaotong Dai   ^{3, 4} , Prof Dr ;   Dafang Chen   ^{1, 2} , MD, PhD

¹ Department of Epidemiology and Biostatistics, Peking University, Beijing, China

² Key Laboratory of Epidemiology of Major Diseases (Peking University), Ministry of Education, Beijing, China

³ School of Sport Science, Beijing Sport University, Beijing, China

⁴ Key Laboratory of Ministry of Education for Sports and Physical Health, Beijing Sport University, Beijng, China