Apparently, you can work up a sweat with bondage-style workout classes

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Here's a fitness trend Christian Grey would approve of: Dominatrixes are offering BDSM-based workout classes that combine fantasies and fitness. (Exercise Makes You Better in Bed, after all.) These kinky calorie burns are (thankfully) yet to be picked up full-time by studios, but they are offered by individuals around the world.

In Australia, Mistress Anna offers a dominant/submissive "forced fitness boot camp" class called "Slave Training and Fitness." And here in the U.S., Snowy Murphy-a woman who teaches similar classes in LA-told People: "There are the people that want to exercise while wearing a leather g-string and maybe have clothespins on their nipples, and then there are people who just want to be motivated to do pushups or sit-ups [where] when they get down to the floor, they kiss my boots."

We understand that a little motivational boost here and there is much needed (hey, that's why we go to trainers, right?), but you don't need us to tell you that said apparel isn't the best workout attire-or that said environment is the right one to build your best body. (Try these 7 Kinky Upgrades for Your Sex Life.) These classes may satisfy the fantasies of fetish-inclined fitness-buffs, sure, but we're sticking with burning calories with certified fitness professionals to avoid injury. Instead, try the Full Body Workout Inspired by Your Favorite Workout Classes-and if you want, suit up and look sexy in 50 Shades of Grey Activewear.