Probably the safest model is an inversion table or chair. It is safer than most than hanging boots. The use of hanging boots is a bit hazardous because the user might have problem in hanging himself or removing the feet from the hanging position. Dangers can increase if the user loses its grip while clutching boots to the bar or if the bar’s supports became weak due to improper installation or because of the user’s weight and all of it might cause the user to fall head first. So only muscled individuals should use hanging boots, where they would have fewer problems in hanging or losing grip.
But tables and chairs are not immune to problems. Law requires that every chair or table has a clearly stated weight limit. Remember that the center of gravity of a machine changes when the person is just sitting and the while the person is in inversion. But if the frame is engineered badly and has many unseen defects, it may bend or break in the stress points while the person undergoes inversion, especially if the frame is old or did not have material quality to carry weight.
Another concern is the control of angle of inversion and returning from normal position, this may not be a problem if there is a buddy present, but some tables are not engineered enough to use without a buddy. This problem is lessened by introduction of new inversion machine tables that have new extra-long handles or rotational pivots that makes it easier to control even while in inversion.
