"Gliding discs" refer to small, smooth discs made of plastic or foam that are used to slide or glide on a surface during exercises or workouts. Full definition
Single leg rope climber on gliding discs — do 45 seconds on each leg if you can (if it's too difficult you can do 30 seconds). (rachaelattard.com)
Sfee Core Exercise Sliders - 2xDual Sided Gliding Discs for Use on Carpet, Hard Floor, Fitness Equipment Idea for Abdominal, Full Body Workout, Training, Leg Sliders, Aerobics, CrossFit + Gift Box (amazon.com)
And it also has demonstration workout videos for each exercise and workout:) I use gliding discs and ankle weights in the eBook but you can do the workouts without xx (rachaelattard.com)