Trafimow J H, Schipplein O D, Novak G J, Andersson G B
Department of Orthopedics, Rush-Presbyterian-St. Luke's Medical Center, Chicago, Illinois.
Spine (Phila Pa 1976). 1993 Mar 1;18(3):364-7. doi: 10.1097/00007632-199303000-00011.
A biomechanical analysis was performed of lifting before and after fatiguing the quadriceps muscles. The hypothesis tested was that when the quadriceps muscles were fatigued the lifter would change lifting technique from more of a squat (leg) lift to more of a stoop (back) lift to decrease the demand on the quadriceps muscles. The hypothesis was broadly supported, and three variables changed significantly with fatigue: trunk angular velocity, which increased, and knee moment integral and hip angles, which both decreased. These changes are all consistent with a change from more of a squat toward a stoop technique. The fact that the technique of lifting changes with quadriceps muscle fatigue underlines the importance of the physiologic condition of these muscles and suggests that rehabilitation of low-back-injured workers should include the quadriceps muscles. The amount of work performed should be controlled to avoid the development of local muscle fatigue and subsequent changes in performance.
对股四头肌疲劳前后的举重动作进行了生物力学分析。所检验的假设是，当股四头肌疲劳时，举重者会将举重技术从更多的深蹲（腿部）举升转变为更多的弯腰（背部）举升，以减少对股四头肌的需求。该假设得到了广泛支持，并且有三个变量随着疲劳而显著变化：躯干角速度增加，膝关节力矩积分和髋关节角度均减小。这些变化都与从更多的深蹲技术向弯腰技术的转变相一致。举重技术随股四头肌疲劳而改变这一事实突出了这些肌肉生理状况的重要性，并表明对下背部受伤工人的康复治疗应包括股四头肌。应控制所完成的工作量，以避免局部肌肉疲劳的发展以及随后的性能变化。
