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.
the inversion table must be secured
( z1 obligate :ARG2 ( z2 secure :ARG1 ( z3 table :mod ( z4 invert ) ) ) )