How to use an inversion table for back pain<br>Secure your inversion table on a flat surface. Ensure that all the joints, straps and pivot points are correctly connected. Do this every time you use the table in order to avoid a serious accident.
Inversion tables should always be used on flat surfaces
The context says "secure your inversion table on a flat surface". I'm not sure why the system did not udnerstand
( z1 recommend :ARG1 ( z2 use :ARG1 ( z3 table :mod ( z4 reverse ) ) :location ( z5 surface :ARG1-of ( z6 flat ) ) :time ( z7 always ) ) )