The side plank hip abduction is a fantastic exercise for strengthening the glutes. Boren et al. (2011) studied it along with several other glute exercises used in rehab and found that it was one of the best glute exercises. Glute medius activation with 88%MVIC for the top leg and 103% for the bottom leg. Glute max activation was 72 and 70% MVIC. To put it simply, this exercise is a great addition to any exercise program. Another great feature of this exercise is that it also works the abodminals as well!