Use of the ME-BYO Index, a Mobile Health App, During an Online Strength Training Program in Adults: Fidelity, Feasibility, and Acceptability Study

Yoshinobu Saito   ^{1, 2} , PhD ;   Naoki Kikuchi   ^{2, 3} , PhD ;   Kaname Watanabe   ^{4, 5, 6} , MD, PhD ;   Sho Nakamura   ^{4, 7} , MD, PhD ;   Hiroto Narimatsu   ^{4, 5, 6, 7} , MD, PhD

¹ Faculty of Sport Management, Nippon Sport Science University, Yokohama, Japan

² Graduate School of Physical Education, Health and Sport Studies, Nippon Sport Science University, Tokyo, Japan

³ Faculty of Sport Science, Nippon Sport Science University, Tokyo, Japan

⁴ Cancer Prevention and Control Division, Kanagawa Cancer Center Research Institute, Yokohama, Japan

⁵ Center for Innovation Policy, Kanagawa University of Human Services, Kawasaki, Japan

⁶ Department of Genetic Medicine, Kanagawa Cancer Center, Yokohama, Japan

⁷ Graduate School of Health Innovation, Kanagawa University of Human Services, Kawasaki, Japan