Comparison of characteristics of bimanual coordinated movements in older adults with frailty, pre-frailty, and robust health - Fujikawa, Shoya; Murata, Shin; Goda, Akio; Sawai, Shun; Yamamoto, Ryosuke; Shizuka, Yusuke; Maru, Takayuki; Nakagawa, Kotaro; Nakano, Hideki (Frontiers in Aging, 2025)