Lying on a pink yoga mat, a flexible woman is doing a childs pose exercise by bending her back backwards

childs pose bhujangasana backbend stretch lower back belly adho mukha svanasana backbending flexibility upperback muscles spine alignment intercostal muscles balasana exercise core exercise workouts flexing lifting hip flexors lumbar spine motions midsection legs exercise mat muscular endurance resistance sets repitition yoga mat fitness knees arms woman sneakers shoulders upraised leg physical activity calorie burn oblique muscles situps training warm up aerobic exercise calisthenics drill stretching pushup