Smartphone-Based Digital Peer Support for a Walking Intervention Among Public Officers in Kanagawa Prefecture: Single-Arm Pre- and Postintervention Evaluation

Masumi Okamoto   ^{1, 2, 3} , MPH ;   Yoshinobu Saito   ^{4, 5} , PhD ;   Sho Nakamura   ^{1, 3, 6} , MD, PhD ;   Makoto Nagasawa   ¹ , PhD ;   Megumi Shibuya   ⁷ , MSc ;   Go Nagasaka   ⁷ , BEng ;   Hiroto Narimatsu   ^{1, 2, 3, 6} , MD, PhD

¹ Graduate School of Health Innovation, Kanagawa University of Human Services, Kawasaki, Japan

² Center for Innovation Policy, Kanagawa University of Human Services, Kawasaki, Japan

³ Cancer Prevention and Control Division, Kanagawa Cancer Center Research Institute, Yokohama, Japan

⁴ Faculty of Sport Management, Nippon Sport Science University, Yokohama, Japan

⁵ Graduate School of Physical Education, Health and Sport Studies, Nippon Sport Science University, Tokyo, Japan

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

⁷ A 10 Lab Inc, Tokyo, Japan