Tunturi Inversion Boots to train your abs. You hook the shoes on a rod. These are the same inversion boots Richard Gere used to train his abdominal muscles in the movie "An Officer and a Gentleman," a training where you hang upside down and do abdominal exercises. Very severe abdominal exercises, for advanced training! Equipped with the necessary firm padding! By hanging upside down, you can quickly recover from a workout and it also has a very positive effect on your back and spine.