Two Ab Workouts July 15, 2007 by Cathe Friedrich The 4 day Split series contains two Core routines, but the Ab workout on Kickbox seemed to be everyone’s favorite. Categories: 4-Day Split Series, Behind The Scenes, BlogTags: 4 day split, ab workout, boot camp, cathe, Higher Intensity Step, kickbox, Lower Intensity Step, workout dvd Leave a Comment Related PostsDate-Sweetened Paleo BrowniesApril 19, 2014Overcome Strength Training Plateaus with Eccentric ContractionsOctober 17, 20217 Powerful Tips to Improve Your Relationship with FoodSeptember 18, 2022