Physical activity group classification algorithm using triaxial acceleration and heart rate. - Motofumi Nakanishi; Shintaro Izumi; Sho Nagayoshi; Hironori Sato; Hiroshi Kawaguchi 001; Masahiko Yoshimoto; Takafumi Ando; Satoshi Nakae; Chiyoko Usui; Tomoko Aoyama; Shigeho Tanaka (EMBC, 2015)