The following insight was made by the guys at PT Podcast episode 35 and I wanted to get it down and share it with you.
If a research study uses quadriceps strengthening exercises as a treatment and gets good pain and functional outcomes, but does not test the subject’s strength after treatment… you cannot make the statement: “Strengthening of the quadriceps improves pain and function.”
You can only infer that performing the movements of these exercises produces the outcome. The outcome is determined by the movement, not the strength that is gained from that movement… or so it would seem, since it was not tested.
Great point! I wonder how much inference is involved n the rest of the body of knowledge that we hold in the profession?
This type of stuff gets me fired up for ODU PT Journal Club to start back up again in the Fall. Discussion certainly yields an expansion of thought…