An exercise slide board is an exercise device that can be used to help improve your cardio fitness and leg strength. What size board should I get? These come in different sizes, so you can choose the one that best fits your needs. You should get booties for slide board workouts, because most slide boards have a non-slip surface and come with booties that help protect your feet from slipping. To use a slide board, simply put on the booties and stand on the board. Then, start sliding your feet back and forth. You can increase the intensity of your workout by sliding faster or by adding resistance bands. Slide boards are a great way to get a low-impact cardio workout.