This workout is part of our Ab Series. The Ab Series includes workout that are Pilates Based, with and without equipment. There are also Fitness Ab Workouts in the Series. This workout features Pilates Mat exercises on the Swiss Ball. The workouts are all under 30 minutes long. This particular workout is about 9 minutes. It?s fast paced and challenging. For more information about the equipment John uses, visit www.merrithew.com.