Bike Crunches Bicycle crunches work your rectus and obliques. Begin by lying flat on the ground with your knees bent 90 degrees.
Russian Twists Russian twists follow. This workout works your obliques and transverse abdominis. Sit on the ground with bent knees and flat feet to set up.
Reverse Crunches Reverse crunches work your lower abs. Start by lying on your back. Keep your arms by your sides or under your glutes for support.
Side Planks Side plank time. This workout works your obliques and transverse abdominis. Lay on your side with your elbow underneath your shoulder.
Mount climbers Mountain climber is the last floor workout for a big waist. This workout works your obliques, hip flexors, and rectus abdominis.