Set of 12 heavy duty, non-slip rubber exercise discs, with illustrated diagrams. Used for circuit training, stations or as a warm up exercise. Activities include: push ups, star jumps, tuck jumps, lunge, bicycle crunches, plank hold, arm circles, sit ups, squats, calf raises, oblique hold and dips. Fabulous for an all over body, low impact workout. Marker size: 24.5cm diameter, 2mm thick.