The purpose of this study was to compare the effect of a 2?week period of the abdominal drawing?in maneuver (ADIM) and tensor fasciae latae?iliotibial band (TFL?ITB) self?stretching on lumbopelvic rotation angle, lumbopelvic rotation movement onset, TFL?ITB length, and pain intensity during active prone hip lateral rotation. Twenty?two subjects with lumbar extension rotation syndrome accompanying shortened TFL?ITB (16 males and 6 females) were recruited for this study. The subjects were instructed how to perform ADIM training or ADIM training plus TFL?ITB self?stretching program at home for a 2?week period. A three?dimensional ultrasonic motion analysis system was used to measure the lumbopelvic rotation angle and lumbopelvic rotation movement onset. An independent t?test was used to determine between?group differences for each outcome measure (lumbopelvic rotation angle, lumbopelvic rotation movement onset, TFL?ITB length, and pain intensity). The level of significance was set as α = 0.05. The results showed that ADIM training plus TFL?ITB self?stretching decreased the lumbopelvic rotation angle, delayed the lumbopelvic rotation movement onset, and elongated the TFL?ITB significantly more than did ADIM training alone. Pain intensity was lower in the ADIM training plus TFL?ITB self?stretching group than the ADIM training alone group; however, the difference was not significant. In conclusion, ADIM training plus TFL?ITB self?stretching performed for a 2?week period at home may be an effective treatment for modifying lumbopelvic motion and reducing low back pain.