The stability ball reverse hyperextensions on the floor are a great exercise
for strengthening your lower back and glutes. Balancing on the ball causes your
core muscles to engage while you work the very important combination of lower
back and gluteal muscles. This is a great way to begin strengthening the lower
back but if the range of motion isn't great enough for you or your personal
training client, use the ball reverse
hyperextension on top of a weight bench as they can increase range of
motion and difficulty.