Figure 4. Root mean square of electromyogram (RMS-EMG) of the moving and non-moving sides of the upper, central, and lower portions of the rectus abdominis (URA, CRA, and LRA, respectively) and the external and internal obliques (EO and IO, respectively) during the eccentric phase of the asymmetric abdominal exercises. The asterisk indicates a statistically significant difference between sides (p < 0.05). The circle indicates outlier value in RMS-EMG. SUT, sit-up twist; OLR, oblique leg raise; SB, side bridge; SBE, side bridge roll out with the elbow; SBF, side bridge roll out with the foot.