Your question was: What is the OMNI Scale, and how is it used?
Our experts said: The OMNI scale was developed by Dr. Robert Robertson to help exercisers rate their perceived exertion (RPE) visually with pictures. The scale has been proven valid and reliable in a variety of exercise modes and populations. Several studies have shown that the OMNI scale is effective for Thera-Band resistive exercise (Colado et al. 2008, 2009). For more information on the OMNI scale book by Robertson, visit Human Kinetics Publishers.
View the OMNI scale here.