A tilting inversion exerciser includes a foot support attached to an extension of a table, a carrier attached to the extension, a spindle attached to the extension, and a foot retaining device includes a lever having an oblong hole for slidably engaging with the spindle, a stem slidably attached to the lever, a pin attached to the stem and slidably engaged in a curved channel of the carrier biased to engage with the carrier, and the lever is engageable with the pin for retaining the pin to the carrier and for preventing the pin from being disengaged from the carrier when the extension of the table is inverted to an up-side-down position, and for giving some security to the user while conducting the inversion exercises.