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Time of onset of EMG activity during the active straight leg raise (ASLR), before the onset of elevation of the lower leg, in the contralateral psoas (contPS), the ipsilateral psoas (ipsiPS), the ipsilateral iliacus (ipsiIL), the ipsilateral rectus femoris (ipsiRF), and the ipsilateral adductor longus (ipsiAL), in conditions without (grey) and with (black) weight added
