Fig. 1.

The graph shows the change in isokinetic muscle strength from preoperatively to 6 weeks postoperatively (expressed in percent strength change). The patients who had mini-posterior THAs had greater improvement in hip extension strength (p = 0.04) and a trend toward a greater increase in strength of the hip flexors (p = 0.16) and hip internal rotators (p = 0.11) compared with patients who had two-incision THAs. ABD = abduction; ADD = adduction; FLX = flexion; EXT = extension; INT ROT = internal rotation; EXT ROT = external rotation.