To maintain muscle mass in minimal gravity, astronauts have been known to engage in a variety of creative workouts, from resistance-band training to cage matches with the proud leaders of alien nations. Keep intergalactic grudges out of your exercise routine with today's Groupon: for $175, you get a 55-1539A Therapy Inversion System from Stamina Products (a $399 value, including shipping).
The Therapy Inversion System gently stretches and strengthens scrunched backs using one’s own body weight and the tenets of Newtonian gravitational laws. After locking ankles into secure, foam-padded collars, users hoist heels toward the sky with the help of weight-leveraging handlebars. Upended backs breathe easily on the supportive pellicle-mesh bed, which helps cushion compacted vertebrae while users enjoy unparalleled views of the monsters or tote bins hiding under the bed. An easily adjustable three-position foot bar and auto-stop feature help ensure comfortable and safe dangles in the privacy of one’s home, and the unit folds for easy storage.