Keeping joints moving Flank stretch

This pose helps maintain mobility in the hips and lower back as you get older and stiffer. You might like to also try the Downward dog pose:
1. Lie on your back with knees bent and feet flat on the floor. Place your right ankle on your left thigh, just above the knee. (If you find this exercise difficult, place a scarf or belt behind the knee to help pull it toward your chest.)
2. Reach forward to catch the left knee (or pull on the ends of the scarf) and draw the knee toward your chest. Maintain control without straining the upper back and neck. Hold for a few breaths, then try the other side.