NYC-based fitness studio The Brrrn focuses on slide board workouts in colder settings. Their in-person slide classes, for example, happen in 50-degree gym spaces. For those who want to do the same workout at home, classes and accessories are available through The Brrrn’s At-Home Subscription, a monthly plan that provides members with access to classes whenever they’d like. All of the classes use the studio’s eponymous Brrrn Board, a five-foot-long surface flanked by two wooden bumpers. From skating-type stance, you slide back and forth, following the instructor’s guidance for knee bend, hand placement and pace. Seasoned sliders can opt for fast-paced classes, longer sessions or workouts that reinvent the way you use the board. Each board weighs 28 pounds and comes with booties and wipes.