If you place a blanket beneath you for this pose, you’ll not only get a deep stretch but also strengthen your leg muscles.
From a high lunge, place both hands on the floor to the inside of your right foot. Lower your left knee to the floor. Bring your forearms down onto a block or, if it feels appropriate, to the floor. Bring your pelvis into a reverse tilt (tailbone forward). You’ll feel the left side of your belly and the front of your left leg (the psoas and quadriceps muscles) stretching. Stay for 5 to 8 breaths, then place your hands back on the floor, straighten your back leg, and step forward into Uttanasana (Standing Forward Bend). After a few breaths there, bend your knees and roll all the way up to Tadasana. Repeat on the other side.