Cat Stretch—a.k.a. Reclined Spinal Twist (Jathara Parivartanasana)

Benefits:

Relieves lower back pain by promoting circulation in the area and increasing spinal flexibility
“Wrings out” toxins by oxygenating and stimulating the internal organs (liver, kidneys, stomach, pancreas, and spleen.), thus flushing out impurities
Tones the abdominal muscles
Releases emotional tension and stress