Figure 2. Abdominal muscle activation between the sexes. RA indicates rectus abdominis; EO, external obliques; TrA-IO, transversus abdominis–internal obliques; *, TrA-IO activation in males was significantly greater than in females ( P < .05); and †, in males, the TrA-IO activation was significantly greater than activation of the RA and EO ( P < .05) .
