Move Targets: Abdominal muscles and hip flexors
Step 1: Lie flat on your back with your arms at your sides, palms facing down and your lower back pressed firmly into the floor. Lift your feet and shoulders 6 to 8 inches off the floor. Quickly kick (flutter) your legs up and down, raising and lowering your feet only a few inches.
Modification (beginner): Place your hands beneath your glutes for added back support. You can also lift your legs higher to ease tension on lower back