The purpose of this study was to investigate the activation of the hip flexor and abdominal muscles during an active straight leg raise (ASLR) to end range of hip flexion. Data were recorded from nine healthy men. Fine-wire electromyography (EMG) electrodes were inserted into psoas major (PM), and surface electrodes were placed over rectus femoris (RF), rectus abdominis, obliquus externus abdominis (OE), and obliquus internus abdominis/transversus abdominis (OI/TrA). EMG and kinematic data were obtained during concentric, hold (at end range) and eccentric phases of an ASLR. Concentric and eccentric movements were divided into three phases (early, mid, and late). Onsets of EMG relative to the onset of the ALSR movement and EMG amplitudes in each phase were compared between muscles. Onsets of the PM (–33 ± 245 ms) and RF (-3 ± 119 ms) EMG prior to leg elevation were significantly earlier than those of the OE and OI/TrA. PM EMG showed highest activation in the late concentric, hold, early eccentric phase, and was significantly higher than RF EMG. OI/TrA EMG was significantly greater in mid and late concentric, hold, and early eccentric phase than other phases. During the ASLR, unlike RF, PM EMG continues to increase towards the end range of hip flexion. Activation of OI/TrA muscle may be involved in control trunk and pelvic movement.

本研究的目的是调查在主动直腿抬高 (ASLR) 到髋屈曲结束范围期间髋屈肌和腹部肌肉的激活。数据来自九名健康男性。将细丝肌电图 (EMG) 电极插入腰大肌 (PM)，将表面电极置于股直肌 (RF)、腹直肌、腹外斜肌 (OE) 和腹内斜肌/腹横肌 (OI/TrA) 上）。EMG 和运动学数据是在 ASLR 的同心、保持（在末端范围）和偏心阶段获得的。向心和离心运动分为三个阶段（早期、中期和晚期）。比较肌肉之间相对于 ALSR 运动开始的 EMG 和每个阶段的 EMG 振幅。腿部抬高前 PM (–33 ± 245 ms) 和 RF (-3 ± 119 ms) EMG 的发生明显早于 OE 和 OI/TrA。PM EMG 在向心晚期、保持、早期离心阶段显示出最高的激活，并且明显高于 RF EMG。OI/TrA EMG 在同心中期和晚期、保持期和离心早期明显高于其他阶段。在 ASLR 期间，与 RF 不同，PM EMG 继续向髋关节屈曲的末端范围增加。OI/TrA 肌肉的激活可能参与控制躯干和骨盆运动。和早期偏心阶段比其他阶段。在 ASLR 期间，与 RF 不同，PM EMG 继续向髋关节屈曲的末端范围增加。OI/TrA 肌肉的激活可能参与控制躯干和骨盆运动。和早期偏心阶段比其他阶段。在 ASLR 期间，与 RF 不同，PM EMG 继续向髋关节屈曲的末端范围增加。OI/TrA 肌肉的激活可能参与控制躯干和骨盆运动。