Gravity can help or hurt. It’s better to invert more often for less time than less often and for longer periods of time. The more you can relieve the pressure in your spinal column the better your circulation of cerebral spinal fluid. Which should then help relieving pain, (depending on your specific ailment.) Im not a doctor but I do work in the field of medical and fitness equipment and have worked with hundreds of people who’ve increased their quality of life by using inversion tables daily. Just like anything, it’s not for everybody and you should always be cleared by a physician before undertaking an activity like this.

The quality of the chair matters and it is good to invert only halfway or slightly more to get acclimated to the new forces on the body.