Influence of active and passive stretching on blood oxygen in ligament and muscle assessed using near-infrared spectroscopy  
Hu Tiantian, Wu Jinpeng, Yue Ping, Yang Qinlao, Wang Jun
Chinese Journal of Tissue Engineering Research . 2019, (20): 3176 -3181 .  DOI: 10.3969/j.issn.2095-4344.1160