Hurts like hell --> No Pain No Gain Fat Burning Ab Exercises. Burn fat and slim down while toning up your abs and strengthening your core. Repeat the circuit once or twice more. Click the image to see the moves in GIF form.
Lift that Butt Mom! Sculpt a Better Butt: Facedown Hip External Rotation -- Don't let the look of this one fool you: It is one of the most challenging and effective moves for targeting your external hip muscles, which have a major impact on your glutes.