Comparison of knee biomechanical characteristics during exercise between pinnacle and step trainers. - You, Yu-Lin; Lin, Chien-Ju; Chieh, Hsiao-Feng; Tsai, Yi-Jung; Lee, Su-Ya; Lin, Cheng-Feng; Hsu, Yu-Chi; Kuo, Li-Chieh; Su, Fong-Chin (Gait & Posture, 2020)