Performing hip extension movements in greater hip abduction may therefore increase gluteus maximus involvement, and thereby produce a superior training effect. (strengthandconditioningresearch.com)
If you have always neglected doing hip extension movement, here is a way to absolve yourself from that mistake: (strengthsensei.com)
Gluteus maximus EMG amplitude is lower in combined hip extension and knee extension movements than in isolated hip extension movements. (strengthandconditioningresearch.com)