Happy Baby Pose What it stretches: lower back and hips Lie on your back, bend both knees, and hold onto the outside edges of your flexed feet with your hands. Keep your arms on the outsides of your legs. Gently use your upper-body strength to equally press both knees to the floor below your armpits. Stay like this for 30 to 60 seconds. Image Source: POPSUGAR Photography / Louisa Larson