CrossFit - Workout of the Day Friday 251024 Complete as Enter Jay Cardiello's Cardio Core 4x4, which shows you that your body can be your gym. Cardiello tailored this program for his tight-on-time celebrity clients, but you don't have to be a celebrity to get these kinds of results Cardio Core 4x4: The 20-Minute, No-Gym Workout That Will