Slim and Fit Thighs

Vrksasana (Tree Pose)
Vrksasana clarifies just how challenging it can be to stand on one leg

Step by Step
Stand in Tadasana Shift your weight slightly onto the left foot, keeping the inner foot firm to the floor, and bend your right knee. Reach down with your right hand and clasp your right ankle.
Draw your right foot up and place the sole against the inner left thigh; if possible, press the right heel into the inner left groin, toes pointing toward the floor. The center of your pelvis should be directly over the left foot.
Rest your hands on the top rim of your pelvis. Make sure the pelvis is in a neutral position, with the top rim parallel to the floor.
Lengthen your tailbone toward the floor. Firmly press the right foot sole against the inner thigh and resist with the outer left leg. Press your hands together in Anjali Mudra. Gaze softly at a fixed point in front of you on the floor about 4 or 5 feet away.
Stay for 30 seconds to 1 minute. Step back to Tadasana with an exhalation and repeat for the same length of time with the legs reversed.

Urdhva Prasarita Eka Padasana (Standing Split)
When you practice Standing Splits focus on the stretch in your quad and hamstring, not how high you can lift your leg

Step by Step
Perform Virabhadrasana II(Warrior II Pose), right leg forward. Inhale and cartwheel your left arm up and over your head, creating a nice opening in the left ribs.
With an exhale, twist your torso to the right, pivoting on the ball of the left foot to lift the heel off the floor. Then lean forward, lay your front torso onto the right thigh, and set your hands on the floor on either side of the right foot (if your hands don't rest comfortably on the floor, support each one on a block).
Walk your hands slightly ahead of, and shift your weight onto, the right foot. Then, inhale and slowly straighten your right leg, simultaneously lifting the left leg parallel to the floor.
The proper balance of external and internal rotation in each leg is important, especially for the standing leg. Your left leg and hip will tend to externally rotate slightly, lifting the hip away from the floor and angling the pelvis to the right. Try to keep the front pelvis parallel to the floor by internally rotating the left thigh.
Pay close attention to the standing leg, especially the angle of the knee. The knee will tend to rotate inwardly: Be sure to rotate the thigh outwardly and turn the knee so the kneecap faces straight ahead.
Feel how the downward energy of the standing leg creates an upward movement in the raised leg. Don't focus on how high your raised leg goes; instead, work toward directing equal energy into both legs. You can hold the raised leg more or less parallel to the floor, or try to raise it slightly higher; ideally your torso should descend as the leg ascends. If you're flexible you can grasp the back of the standing-leg ankle with the opposite-side hand.
Stay for 30 seconds to 1 minute. Then, lower the raised leg with an exhale and repeat on the other side for the same length of time.

Eka Pada Rajakapotasana II (One-Legged King Pigeon Pose II)
Nowadays we simply shoo pigeons away from our public gathering places. But in Vedic times, 3,000 years ago, the pigeon was a bird of ill omen, the messenger of the goddess Nirriti, a personification of misfortune, misery, and death.

Step by Step
Sit in Dandasana(Staff Pose). Bend your right knee and place the foot on the floor just in front of the right sitting bone. The shin will be approximately perpendicular to the floor.
Then shift slightly to the right and swing your left leg straight back behind the torso. Lay it on the floor fully extended, with the front of the leg (and top of the foot) on the floor.
Bend your left knee and raise the shin approximately perpendicular to the floor. Your body weight will balance on the right foot and left knee (and thigh if you're very flexible). To stabilize your position, push your right knee forward until it protrudes out slightly beyond the right toes.
Inhale as you lift your right arm up and, bending the elbow, exhale and take the left foot. Then do the same with your left arm. Holding the foot firmly, lift your chest and drop your head back toward the sole of your left foot. Press your elbows toward the ceiling. Hold for about 15 to 30 seconds, breathing as smoothly as possible.
Exhale and release the left foot and bring the leg back to the floor. Repeat steps 1 through 4 on the left side for the same length of time.

Eka Pada Rajakapotasana (One-Legged King Pigeon Pose)
Deep backbend that puffs the chest, making a yogi resemble a pigeon.

Step by Step
Begin on all fours, with your knees directly below your hips, and your hands slightly ahead of your shoulders. Slide your right knee forward to the back of your right wrist; at the same time angle your right shin under your torso and bring your right foot to the front of your left knee. The outside of your right shin will now rest on the floor. Slowly slide your left leg back, straightening the knee and descending the front of the thigh to the floor. Lower the outside of your right buttock to the floor. Position the right heel just in front of the left hip.
The right knee can angle slightly to the right, outside the line of the hip. Look back at your left leg. It should extend straight out of the hip (and not be angled off to the left), and rotated slightly inwardly, so its midline presses against the floor. Exhale and lay your torso down on the inner right thigh for a few breaths. Stretch your arms forward.
Then slide your hands back toward the front shin and push your fingertips firmly to the floor. Lift your torso away from the thigh. Lengthen the lower back by pressing your tailbone down and forward; at the same time, and lift your pubis toward the navel. Roll your left hip point toward the right heel, and lengthen the left front groin.
If you can maintain the upright position of your pelvis without the support of your hands on the floor, bring your hands to the top rim of your pelvis. Push heavily down. Against this pressure, lift the lower rim of your rib cage. The back ribs should lift a little faster than the front. Without shortening the back of your neck, drop your head back. To lift your chest, push the top of your sternum (at the manubrium) straight up toward the ceiling.
Stay in this position for a minute. Then, with your hands back on the floor, carefully slide the left knee forward, then exhale and lift up and back into Adho Mukha Svanasana (Downward Facing Dog Pose). Take a few breaths, drop the knees to all-fours on another exhalation, and repeat with the legs reversed for the same length of time.

Krounchasana (Heron Pose)
Intensifies the stretch of Triang Mukha Eka Pada Pashcimottanasana.

Step by Step
Sit in Dandasana (Staff Pose). Bring your left leg into Ardha Virasana. Then bend your right knee and place the foot on the floor, just in front of the right sitting bone. Place your right arm against the inside of the right leg (so that your shoulder presses against the inner knee). Cross your hand in front of the right ankle and grasp the outside of the right foot. Finally grasp the inside of the right foot with your left hand.
Lean back slightly, but keep the front torso long. Firm the shoulder blades against your back to help maintain the lift of the chest. Inhale and raise the leg diagonally to the floor, angled about 45 degrees, or with the foot as high as or slightly higher than your head.
Hold this position for 30 seconds to a minute. Then exhale and release the raised leg. Carefully unbend and straighten the left leg (see the description of Virasana [Hero Pose] for the safe way to remove the leg from its position). Repeat with the legs reversed for the same length of time.