Please choose the correct ending to complete the given sentence: Health: [header] How to do reflexology [title] Learn the fundamentals of reflexology. [step] Reflexology is based on the premise that the nerves in your feet, hands and ears each correspond with other parts of your body. Applying pressure to certain reflex areas can relieve symptoms in other parts of the body.

Ending1: The first step to reflexology is learning how to sit still, lie down, sit upright, or extend your legs out in front of you. [substeps] The basics might seem fun, but you'll feel stuck if you're not able to sit still for much length. Ending2: Reflexology is also a part of traditional medicine. The term " reflexology " means " electrical activity " and refers to the blood vessels on your feet, on your hands, on your fingers. Ending3: One of the key organs that emit reflexology is the nervous system, which is what gives reflexology its name. [substeps] Your body is based on the premise that the nerve is responsible for getting sound into the mind. Ending4: Engaging a nerve in your big toe, for example, could reduce tension in your head and relieve a headache. Applying pressure to your heel could aid in digestion.

Answer format: ending1/ending2/ending3/ending4