The Single-Leg Circle works your abs, hips, hamstrings. and your inner and outer thighs. Do 5 reps on each leg, first clockwise, then counterclockwise.
-The Single Leg Circle: Lie back on the mat with your arms by your sides and your palms facing down. Begin by pointing your left foot as if reaching out with your toes towards the ceiling and rotate your legs slightly outward. Inhale and trace a circle on the ceiling with your left leg, moving your whole leg, but keeping your hips still. Don't lift your left hip off the floor. Trace the circle on the ceiling 5 times in a clockwise direction then repeat it in a counterclockwise direction. Now switch legs and repeat the exercise. The single leg circle works your abs, hips, hamstrings, and your inner and outer thighs.